CN111517729A - Sleeve grouting material for connecting steel bars of fabricated building - Google Patents
Sleeve grouting material for connecting steel bars of fabricated building Download PDFInfo
- Publication number
- CN111517729A CN111517729A CN202010474261.2A CN202010474261A CN111517729A CN 111517729 A CN111517729 A CN 111517729A CN 202010474261 A CN202010474261 A CN 202010474261A CN 111517729 A CN111517729 A CN 111517729A
- Authority
- CN
- China
- Prior art keywords
- grouting material
- waste concrete
- parts
- sleeve grouting
- micro powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000463 material Substances 0.000 title claims abstract description 88
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 21
- 239000010959 steel Substances 0.000 title claims abstract description 21
- 239000004567 concrete Substances 0.000 claims abstract description 86
- 239000002699 waste material Substances 0.000 claims abstract description 73
- 239000000843 powder Substances 0.000 claims abstract description 61
- 239000000835 fiber Substances 0.000 claims abstract description 58
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000004568 cement Substances 0.000 claims abstract description 25
- 239000006004 Quartz sand Substances 0.000 claims abstract description 24
- 239000002131 composite material Substances 0.000 claims abstract description 23
- 239000002245 particle Substances 0.000 claims description 53
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 52
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 26
- 238000002360 preparation method Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 15
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 14
- 239000004113 Sepiolite Substances 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 14
- 229910052624 sepiolite Inorganic materials 0.000 claims description 14
- 235000019355 sepiolite Nutrition 0.000 claims description 14
- 241000209094 Oryza Species 0.000 claims description 13
- 235000007164 Oryza sativa Nutrition 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 13
- 235000009566 rice Nutrition 0.000 claims description 13
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 11
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 10
- 239000012634 fragment Substances 0.000 claims description 10
- 235000013379 molasses Nutrition 0.000 claims description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 9
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 9
- 239000002518 antifoaming agent Substances 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 8
- 239000003112 inhibitor Substances 0.000 claims description 8
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 8
- 238000000498 ball milling Methods 0.000 claims description 7
- 239000000292 calcium oxide Substances 0.000 claims description 7
- 235000012255 calcium oxide Nutrition 0.000 claims description 7
- 125000000217 alkyl group Chemical group 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- -1 glycerin fatty acid ester Chemical class 0.000 claims description 6
- 230000001678 irradiating effect Effects 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000007873 sieving Methods 0.000 claims description 4
- 239000004094 surface-active agent Substances 0.000 claims description 4
- 241001474374 Blennius Species 0.000 claims description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerol Natural products OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 3
- FHVDTGUDJYJELY-UHFFFAOYSA-N 6-{[2-carboxy-4,5-dihydroxy-6-(phosphanyloxy)oxan-3-yl]oxy}-4,5-dihydroxy-3-phosphanyloxane-2-carboxylic acid Chemical compound O1C(C(O)=O)C(P)C(O)C(O)C1OC1C(C(O)=O)OC(OP)C(O)C1O FHVDTGUDJYJELY-UHFFFAOYSA-N 0.000 claims description 2
- TXQVDVNAKHFQPP-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CO)(CO)CO TXQVDVNAKHFQPP-UHFFFAOYSA-N 0.000 claims description 2
- 229940072056 alginate Drugs 0.000 claims description 2
- 235000010443 alginic acid Nutrition 0.000 claims description 2
- 229920000615 alginic acid Polymers 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 2
- 239000000194 fatty acid Substances 0.000 claims description 2
- 229930195729 fatty acid Natural products 0.000 claims description 2
- 125000005456 glyceride group Chemical group 0.000 claims description 2
- 230000003014 reinforcing effect Effects 0.000 claims 4
- 239000011440 grout Substances 0.000 claims 2
- 235000011187 glycerol Nutrition 0.000 claims 1
- 230000004913 activation Effects 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 abstract description 7
- 239000000126 substance Substances 0.000 abstract description 6
- 230000000052 comparative effect Effects 0.000 description 46
- 230000000694 effects Effects 0.000 description 12
- 239000000654 additive Substances 0.000 description 9
- 239000002956 ash Substances 0.000 description 9
- 230000000996 additive effect Effects 0.000 description 8
- 238000006703 hydration reaction Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 230000036571 hydration Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 235000019738 Limestone Nutrition 0.000 description 3
- 238000013329 compounding Methods 0.000 description 3
- 150000004683 dihydrates Chemical class 0.000 description 3
- 229910052602 gypsum Inorganic materials 0.000 description 3
- 239000010440 gypsum Substances 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000006028 limestone Substances 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 235000010755 mineral Nutrition 0.000 description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- HYZJCKYKOHLVJF-UHFFFAOYSA-N 1H-benzimidazole Chemical compound C1=CC=C2NC=NC2=C1 HYZJCKYKOHLVJF-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 239000000378 calcium silicate Substances 0.000 description 2
- 229910052918 calcium silicate Inorganic materials 0.000 description 2
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- CRVGTESFCCXCTH-UHFFFAOYSA-N methyl diethanolamine Chemical compound OCCN(C)CCO CRVGTESFCCXCTH-UHFFFAOYSA-N 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 229920002748 Basalt fiber Polymers 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- PLYWEXFVESBTFL-UHFFFAOYSA-N O(C=1C=C(C(C(=O)NN)=CC1)C(=O)O)C=1C=C(C(C(=O)NN)=CC1)C(=O)O Chemical compound O(C=1C=C(C(C(=O)NN)=CC1)C(=O)O)C=1C=C(C(C(=O)NN)=CC1)C(=O)O PLYWEXFVESBTFL-UHFFFAOYSA-N 0.000 description 1
- ULUAUXLGCMPNKK-UHFFFAOYSA-N Sulfobutanedioic acid Chemical group OC(=O)CC(C(O)=O)S(O)(=O)=O ULUAUXLGCMPNKK-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 229910052599 brucite Inorganic materials 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
- 239000000920 calcium hydroxide Substances 0.000 description 1
- 229910001861 calcium hydroxide Inorganic materials 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002121 nanofiber Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/16—Waste materials; Refuse from building or ceramic industry
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/023—Chemical treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/04—Heat treatment
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Civil Engineering (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a sleeve grouting material for connecting steel bars of an assembly type building, which comprises the following components in parts by weight: 700 portions of cement, 80 to 150 portions of waste concrete active micro powder, 800 portions of quartz sand, 10 to 90 portions of composite fiber and 30 to 110 portions of admixture; the used waste concrete active micro powder adopts a special physical-chemical combined activation technology, obviously improves the mechanical strength of the sleeve grouting material, and improves the fluidity of the grouting material.
Description
Technical Field
The invention belongs to the field of cement-based building materials, and particularly relates to a sleeve grouting material for connecting steel bars of an assembly type building.
Background
The prefabricated building is one of the key structural forms developed in the current housing industrialization process in China. The fabricated building has the advantages of high construction speed, small restriction on climatic conditions, better control on construction quality, construction period, labor consumption and cost, low energy consumption and pollution in site construction, low labor cost, high production efficiency and the like. The key technology of the assembly type building construction is the connection between the nodes of the structural part, if the connection quality of the nodes has problems, the components are cracked if the nodes are light, and the structure is disintegrated and collapsed if the nodes are heavy. At present, the steel bar connection in the fabricated building mainly adopts a steel bar sleeve grouting connection technology, namely cement-based grouting material is injected into the sleeve at normal temperature, the grouting material and the steel bar in the sleeve form reliable bonding, and the bonding effect is realized at the interface through the steel bar and the grouting material to bear the load necessary for bearing the structure. The essence of the bonding effect is that the tensile force is transmitted to the grouting material through the reinforcing steel bars, and then transmitted to the connecting sleeve or other structural members through the grouting material, so that the whole structure is stressed. Therefore, the quality of the sleeve grouting material for connecting the steel bars and the bonding degree of the sleeve grouting material and the steel bars in the sleeve directly determine the quality, safety and service time of the fabricated building. The national release standard JGT408-2013 sleeve grouting material for steel bar connection strictly regulates the quality of the sleeve grouting material for steel bar connection.
In the existing patent application, the sleeve grouting material provided by CN108947424A is added with I-grade fly ash, active silica fume and ultrafine brucite powder as admixture, and composite fiber compounded by basalt fiber, ultra-short ultrafine steel fiber and nano fiber in proportion is added, but the mechanical strength of the grouting material still has a certain space-improving problem.
The sleeve grouting materials provided by the invention CN105693173B and CN106699077B adopt double-doped cement, namely Portland cement and sulphoaluminate cement are superposed for use. The silicate cement and the sulphoaluminate cement are two different types of cement, the hydration process is completely different from the hydration product, and the rapid setting or flash setting phenomenon can occur when the cement is used. Even if the retarder is used for controlling the hydration reaction, the finished grouting material also has hidden quality danger.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a sleeve grouting material for connecting reinforcing steel bars, which is realized by the following technology.
The sleeve grouting material for connecting the steel bars of the fabricated building comprises the following components in parts by weight: 700 portions of cement, 80 to 150 portions of waste concrete active micro powder, 800 portions of quartz sand, 10 to 90 portions of composite fiber and 30 to 110 portions of admixture;
the preparation method of the waste concrete active micro powder comprises the following steps:
s1, crushing the waste concrete with the strength grade not lower than C50 into concrete fragments with the particle size not more than 50mm, and then drying for 2.5h at 400 ℃;
s2, adding a surfactant into the dried concrete blocks, and performing ball milling to obtain particles with the particle size of not more than 0.15 mm;
s3, irradiating the particles obtained in the step S2 for 20min by microwaves with the frequency of 2400MHz, and then grinding the particles together with hydroxy polyaluminium chloride and calcareous quicklime with the particle size of less than 4.75mm until the specific surface area is more than or equal to 500 square meters per kg, thus obtaining the waste concrete active micro powder.
According to the sleeve grouting material for connecting the steel bars, the waste concrete active micro powder is added into the raw materials, so that the mechanical strength such as the compressive strength, the flexural strength and the tensile strength of the finally prepared sleeve grouting material is obviously enhanced. The preparation process of the waste concrete active micro powder is that waste concrete fragments are firstly crushedCrushing, treating the fragments by physical microwave irradiation, chemically strengthening by using hydroxy polyaluminium chloride, and grinding together with calcareous quicklime to a certain particle size. The microwave irradiates the material to generate temperature difference between the minerals of the material, so that the minerals in the material generate phase change, crystal form transformation and chemical reaction. The reclaimed sand powder of the waste concrete contains cement hydration products or carbonate (with no activity or low activity), and the hydration products can generate phase change after being irradiated by microwave to form a dehydration phase (such as calcium silicate (C-S), calcium aluminate (C-A) and calcium hydroxide (Ca (OH))2) Carbonate forms a transformation phase (CaO), and the dehydration phase and the transformation phase can obtain hydration property again, so that the activity of the reclaimed sand micro powder of the waste concrete can be improved. The hydroxy polyaluminium chloride belongs to hydroxy polyaluminium, which contains [ Al13O4(OH)24]7+、Cl-Form [ Al ] after hydrolysism(OH)n]3m-n+、Cl-。[Alm(OH)n]3m-n+Can increase the solubility of soluble substances, and make the dehydrated phase or the converted phase after microwave irradiation undergo alkali activation reaction to improve the activity of the water-soluble substances. Cl-Can also promote the generation of ettringite in the cement and improve the early strength of the grouting material. Through the physical-chemical combined activation mode, compared with the common waste concrete micro powder with the same granularity, the waste concrete active micro powder has higher activity, the mechanical strength of the reinforcing steel bar sleeve grouting material can be obviously enhanced, and the fluidity is also improved to a certain degree.
The used cement is ordinary portland cement which meets the technical standard of GB175-2007 general portland cement and has the strength grade of 52.5, and the 3d compressive strength is not lower than 29.0MPa, and the 28d compressive strength is not lower than 58.0 MPa. The used additives are common raw materials in the sleeve grouting material, and comprise a water reducing agent, an expanding agent, a defoaming agent and a rust inhibitor, which are all common types on the market. For example, the water reducing agent may be selected from a non-air entraining type powdery polycarboxylic acid water reducing agent having a water reducing rate of not less than 30%. The expanding agent consists of an early expanding agent and a middle and later expanding agent, wherein the early expanding agent comprises at least one of 4,4' -oxydiphthalic hydrazide, alkyl glucamide, sulfosuccinate ester salt and a carbonate foaming agent, and the middle and later expanding agent comprises sulphoaluminate cement clinker, limestone and dihydrate gypsum; when in use, the sulphoaluminate cement clinker of the expanding agent in the middle and later stages, the limestone and the dihydrate gypsum are ground together, the specific surface area is not less than 450 square meters per kg, and then the expanding agent in the early stage is mixed with the ground expanding agent. The defoaming agent can be polyether modified polysiloxane defoaming agent. The rust inhibitor can be a composite rust inhibitor, namely a composition doped with 2, 5-dimercapto-1, 3, 4-thiatriazole, benzimidazole and N, N-bis (2-hydroxyethyl) methylamine.
Preferably, the percentage of the waste concrete active micro powder in the total amount of the sleeve grouting material components is 5-7%; when the percentage is 6%, the prepared sleeve grouting material has better performance.
Preferably, the sleeve grouting material provided by the invention comprises the following components in parts by weight: 820 parts of cement, 120 parts of waste concrete active micro powder, 950 parts of quartz sand, 60 parts of composite fiber and 70 parts of additive.
Preferably, in the step S3 of preparing the waste concrete active fine powder, the material subjected to microwave irradiation with a frequency of 2400MHz comprises the particles obtained in the step S2 and rice hull ash which are uniformly mixed, and the using amount ratio of the rice hull ash to the particles obtained in the step S2 is 1: 2-6. By mixing the waste concrete particles with the rice hull ash before microwave irradiation, activation of the waste concrete active micro powder can be further promoted, and the activity of the product is stronger.
More preferably, in the step S3 of preparing the waste concrete active fine powder, the ratio of the rice hull ash to the particles obtained in the step S2 is 1: 4.
Preferably, the surfactant used in the preparation of the waste concrete active fine powder is at least one of alkyl polyglucoside, pentaerythritol stearate, citric acid fatty glyceride and glycerol fatty acid ester.
Preferably, when the waste concrete active micro powder is prepared, the content of alumina in the adopted hydroxyl polymeric aluminum is not less than 75%.
Preferably, the quartz sand is prepared by grinding common quartz sand for 10-30min, sieving into three quartz sand with different particle sizes of 20-40 meshes, 40-70 meshes and more than 70 meshes, and finally compounding and uniformly mixing according to the weight ratio of 2-6:1-4: 1.
Preferably, the preparation method of the composite fiber comprises the following steps: adding light calcium carbonate and heavy calcium carbonate into the fiber raw material, uniformly mixing, adding molasses and water, uniformly stirring and drying to obtain the composite material; the fiber raw materials are sepiolite fibers and polyvinyl alcohol fibers, or sepiolite fibers and seaweed fibers. The water used is mainly enough to ensure that all the raw materials can be fully mixed, and the dosage is 2 to 4 times of the dosage of other raw materials. The specific surface area of the light calcium carbonate is not less than 4500 square meters per kilogram, and the specific surface area of the heavy calcium carbonate is not less than 1500 square meters per kilogram.
More preferably, the weight ratio of the sepiolite fibers to the polyvinyl alcohol fibers or the weight ratio of the sepiolite fibers to the seaweed fibers is 1: 1-2;
the total weight of the light calcium carbonate and the heavy calcium carbonate is 5-6 times of that of the fiber raw material, the weight ratio of the light calcium carbonate to the heavy calcium carbonate is 0.5-2.5:1, and the dosage of the molasses is 0.4-0.8% of the total weight of the light calcium carbonate, the heavy calcium carbonate and the fiber raw material.
Preferably, the admixture comprises: 2-4 parts of a water reducing agent, 20-70 parts of an expanding agent, 0.5-2 parts of a defoaming agent and 5-40 parts of a rust inhibitor.
When the reinforcing steel bar sleeve grouting material is used, mixing water accounting for 11-14% of the weight of the reinforcing steel bar connecting sleeve grouting material is added, and the mixture can be used for sleeve grouting after being uniformly stirred.
Compared with the prior art, the invention has the advantages that:
1. by adding the waste concrete active micro powder into the sleeve grouting material, the mechanical strength of the grouting material is obviously improved, and the fluidity is improved;
2. the waste concrete active micro powder has higher activity compared with common waste concrete powder by adopting a physical-chemical combined activation technology; in addition, the rice hull ash added in the activation technical process is additionally used before activation, so that the physical-chemical combined activation effect can be enhanced, the activity of the waste concrete active micro powder is further enhanced, and the mechanical strength of the sleeve grouting material is maximized finally.
3. The waste concrete is used, so that the cost is reduced, and the purposes of waste utilization, energy conservation and environmental protection are achieved.
Detailed Description
The technical solutions of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the following examples and comparative examples, the cement selected was ordinary portland cement having a strength grade of 52.5 purchased from dun stone of cement, inc. of the east of Liaoning Ji, and had a 3d compressive strength of not less than 29.0MPa and a 28d compressive strength of not less than 58.0 MPa. The raw material used by the waste concrete active micro powder is waste concrete, and is purchased from Shenyang integrity environmental service company Limited. The quartz sand is purchased to Shenyang mountain city quartz sand factory. In the raw materials of the composite fiber, sepiolite fiber, polyvinyl alcohol fiber and alginate fiber are respectively purchased to Shijiazhuang whole mineral products Limited company, Yukui engineering materials Limited company in Laiwu city and Qingdao Gecheng Longqi and Longqi biological technology Limited company, light calcium carbonate and heavy calcium carbonate are purchased from Fushun you super calcium resistant industry Limited company, and molasses is purchased from Shenyang molasses technology Limited company.
In the admixture, a water reducing agent is a commercially available polycarboxylic acid water reducing agent; the expanding agent is selected from sulfosuccinate, sulphoaluminate cement clinker, limestone and dihydrate gypsum; the defoaming agent is polyether modified polysiloxane defoaming agent; the rust inhibitor is a composition doped with a compound rust inhibitor, namely 2, 5-dimercapto-1, 3, 4-thiatriazole, benzimidazole and N, N-bis (2-hydroxyethyl) methylamine. The additive comprises the following components in parts by weight: 4 parts of water reducing agent, 70 parts of expanding agent, 2 parts of defoaming agent and 34 parts of rust inhibitor.
The waste concrete active micro powder is prepared by the following steps unless otherwise specified:
s1, crushing the waste concrete with the strength grade not lower than C50 into concrete fragments with the particle size not more than 50mm, and then drying for 2.5h at 400 ℃;
s2, adding alkyl polyglucoside into the dried concrete blocks, and then carrying out ball milling to obtain particles with the particle size of not more than 0.15 mm;
s3, irradiating the particles obtained in the step S2 for 20min by microwaves with the frequency of 2400MHz, and then grinding the particles together with hydroxy polyaluminum chloride with the content of aluminum oxide of about 80 percent and calcareous quicklime with the particle size of less than 4.75mm until the specific surface area is more than or equal to 500 square meters per kg, thus obtaining the waste concrete active micro powder.
The quartz sand used, unless otherwise specified, was prepared in the following manner: grinding common quartz sand for 20min, sieving into three kinds of quartz sand with different particle sizes of 20-40 mesh, 40-70 mesh and over 70 mesh, and finally compounding and mixing according to the weight ratio of 4:2: 1.
The composite fibers used, unless otherwise specified, were prepared in the following manner:
p1, weighing 25 parts of sepiolite fibers and 25 parts of polyvinyl alcohol fibers according to the proportion of 1:1, adding 125 parts of light calcium carbonate and 125 parts of heavy calcium carbonate according to the proportion of 1:1, and uniformly mixing;
p2, adding 2 parts of molasses and 700 parts of water, stirring uniformly, and drying by hot air at 80 ℃.
Example 1
The sleeve grouting material provided by the embodiment comprises the following components in parts by weight: 820 parts of cement, 120 parts of waste concrete active micro powder, 950 parts of quartz sand, 60 parts of composite fiber and 70 parts of additive; wherein the percentage of the waste concrete active micro powder in the total amount of the sleeve grouting material components is about 6%.
Example 2
The sleeve grouting material provided by the embodiment comprises the following components in parts by weight: 820 parts of cement, 100 parts of waste concrete active micro powder, 950 parts of quartz sand, 60 parts of composite fiber and 70 parts of additive; namely, the percentage of the waste concrete active micro powder in the total amount of the sleeve grouting material components is 5%.
Example 3
The sleeve grouting material provided by the embodiment comprises the following components in parts by weight: 820 parts of cement, 143 parts of waste concrete active micro powder, 950 parts of quartz sand, 60 parts of composite fiber and 70 parts of additive; namely, the percentage of the waste concrete active micro powder in the total amount of the sleeve grouting material components is about 7%.
Example 4
The sleeve grouting material provided by the embodiment comprises the following components in parts by weight: 700 parts of cement, 150 parts of waste concrete active micro powder, 1100 parts of quartz sand, 10 parts of composite fiber and 30 parts of additive; wherein the percentage of the waste concrete active micro powder in the total amount of the sleeve grouting material components is 7.5%.
Example 5
The sleeve grouting material provided by the embodiment comprises the following components in parts by weight: 900 parts of cement, 80 parts of waste concrete active micro powder, 800 parts of quartz sand, 90 parts of composite fiber and 110 parts of additive; wherein the percentage of the waste concrete active micro powder in the total amount of the sleeve grouting material components is 4.0%.
Example 6
The sleeve grouting material provided by the embodiment has the same components as those in embodiment 1, except that:
the preparation method of the waste concrete active micro powder adopted by the embodiment comprises the following steps:
s1, crushing the waste concrete with the strength grade not lower than C50 into concrete fragments with the particle size not more than 50mm, and then drying for 2.5h at 400 ℃;
s2, adding alkyl polyglucoside into the dried concrete blocks, and then carrying out ball milling to obtain particles with the particle size of not more than 0.15 mm;
s3, weighing the particles obtained in the step S2 and rice hull ash, uniformly mixing the particles and the rice hull ash according to the proportion of 4:1, irradiating the mixture for 20min by using microwaves with the frequency of 2400MHz, and then grinding the mixture together with hydroxy polyaluminum chloride and calcareous quicklime with the particle size of less than 4.75mm until the specific surface area is not less than 500 square meters per kg, thus obtaining the waste concrete active micro powder. The used rice hull ash was purchased from Touchai (Panjin) Rice Biotech limited.
Comparative example 1
The sleeve grouting material provided by the comparative example comprises the following components in parts by weight: 820 parts of cement, 120 parts of waste concrete micro powder, 950 parts of quartz sand, 60 parts of composite fiber and 70 parts of additive; the percentage of the waste concrete active micro powder in the total amount of the sleeve grouting material components is about 6%, which is the same as that in the embodiment 1.
The preparation method of the waste concrete micro powder adopted by the comparative example comprises the following steps:
s1, crushing the waste concrete with the strength grade not lower than C50 into concrete fragments with the particle size not more than 50mm, and then drying for 2.5h at 400 ℃;
s2, adding alkyl polyglucoside into the dried concrete blocks, and then carrying out ball milling to obtain particles with the particle size of not more than 0.15 mm;
s3, irradiating the particles obtained in the step S2 for 20min by using microwaves with the frequency of 2400MHz, and then grinding the particles until the specific surface area is more than or equal to 500 square meters per kg to obtain the waste concrete micro powder of the comparative example.
Comparative example 2
The sleeve grouting material provided by the comparative example has the same components as those of the comparative example 1, and the difference is that:
the preparation method of the waste concrete micro powder adopted by the comparative example comprises the following steps:
s1, crushing the waste concrete with the strength grade not lower than C50 into concrete fragments with the particle size not more than 50mm, and then drying for 2.5h at 400 ℃;
s2, adding alkyl polyglucoside into the dried concrete blocks, and then carrying out ball milling to obtain particles with the particle size of not more than 0.15 mm;
s3, grinding the particles obtained in the step S2, hydroxy polyaluminium chloride with the content of aluminum oxide being not less than 50 percent and calcareous quicklime with the particle size being less than 4.75mm together until the specific surface area is not less than 500 square meters per kg, thus obtaining the waste concrete active micro powder.
Comparative example 3
The sleeve grouting material provided by the comparative example has the same components as those of the comparative example 1, and the difference is that:
the preparation method of the waste concrete micro powder adopted by the comparative example comprises the following steps:
s1, crushing the waste concrete with the strength grade not lower than C50 into concrete fragments with the particle size not more than 50mm, and then drying for 2.5h at 400 ℃;
s2, performing ball milling to obtain particles with the particle size of not more than 0.15 mm;
s3, irradiating the particles obtained in the step S2 for 20min by microwaves with the frequency of 2400MHz, and then grinding the particles together with hydroxy polyaluminum chloride with the content of aluminum oxide not less than 50% and calcareous quicklime with the particle size less than 4.75mm until the specific surface area is not less than 500 square meters per kg, thus obtaining the waste concrete active micro powder.
Comparative example 4
The sleeve grouting material provided by the comparative example has the same components as those of the comparative example 1, and the difference is that:
the preparation method of the waste concrete micro powder adopted by the comparative example comprises the following steps: crushing the waste concrete with the strength grade not lower than C50 into concrete fragments with the particle size not more than 50mm, drying for 2.5h at 400 ℃, and finally grinding until the specific surface area is not less than 500 square meters per kg to obtain the waste concrete micro powder.
Comparative example 5
The sleeve grouting material provided by the comparative example has the same components as those of the comparative example 1, and the difference is that:
the preparation method of the quartz sand adopted in the comparative example comprises the following steps: grinding common quartz sand for 5h, sieving into 20-40 mesh and 40-70 mesh quartz sand with different particle sizes, and finally compounding and uniformly mixing according to the weight ratio of 2: 1.
Comparative example 6
The sleeve grouting material provided by the comparative example has the same components as those of the comparative example 1, and the difference is that:
the preparation method of the composite fiber adopted in the comparative example comprises the following steps:
p1, weighing 25 parts of sepiolite fibers and 25 parts of polyvinyl alcohol fibers according to the proportion of 1:1, adding 250 parts of light calcium carbonate, and uniformly mixing;
p2, adding 2 parts of molasses and 700 parts of water, stirring uniformly, and drying by hot air at 80 ℃.
Comparative example 7
The sleeve grouting material provided by the comparative example has the same components as those of the comparative example 1, and the difference is that:
the preparation method of the composite fiber adopted in the comparative example comprises the following steps:
p1, weighing 25 parts of sepiolite fibers and 25 parts of polyvinyl alcohol fibers according to the proportion of 1:1, adding 250 parts of ground calcium carbonate, and uniformly mixing;
p2, adding 2 parts of molasses and 700 parts of water, stirring uniformly, and drying by hot air at 80 ℃.
Comparative example 8
The sleeve grouting material provided by the comparative example has the same components as those of the comparative example 1, and the difference is that:
the preparation method of the composite fiber adopted in the comparative example comprises the following steps:
p1, weighing 150 parts of sepiolite fibers and 150 parts of polyvinyl alcohol fibers according to the proportion of 1:1, and uniformly mixing;
p2, adding 2 parts of molasses and 700 parts of water, stirring uniformly, and drying by hot air at 80 ℃.
Comparative example 9
The sleeve grouting material provided by the comparative example has the same components as those of the comparative example 1, and the difference is that:
the preparation method of the composite fiber adopted in the comparative example comprises the following steps: weighing 25 parts of sepiolite fibers and 25 parts of polyvinyl alcohol fibers according to the proportion of 1:1, adding 125 parts of light calcium carbonate and 125 parts of heavy calcium carbonate according to the proportion of 1:1, and uniformly mixing. Application example 1: performance testing of the above-described example and comparative example Sleeve grouting materials
The sleeve grouting materials for reinforcing steel bar connection prepared in examples 1 to 6 and comparative examples 1 to 9 are mixed with water accounting for 12% of the mass of the grouting materials. The initial fluidity and the fluidity after 30min of the sleeve grouting material and the compressive strength of (1d, 3d and 28d) of the sleeve grouting material are measured according to the method in JGT408-2013 sleeve grouting material for connecting steel bars. The sleeve grouting materials for connecting the steel bars prepared in the examples 1 to 6 and the comparative examples 1 to 9 are mixed with water, poured into a full grouting sleeve, anchored with steel bars (nominal diameter 25mm) of HRB500E, subjected to a unidirectional tensile test, and tested for tensile strength. In addition, the flexural strength of the grouting material was also measured, and the results are shown in table 1 below.
TABLE 1 Performance test results of Sleeve grouting materials
In the above tests, no bleeding was observed in both the examples and the comparative examples. According to the test data in the table 1 above, it can be seen from the comparison of examples 1 to 6 that the sleeve grouting material prepared by using the amounts of the components in example 1 has the best mechanical properties and relatively smaller fluidity variation; the final performance of the sleeve grouting material can be influenced by adjusting the proportion of the waste concrete active micro powder in the sleeve grouting material. When the waste concrete active micro powder is prepared, the rice hull ash is additionally added in the corresponding steps, so that the mechanical strength of the grouting material can be further improved. It can be known from comparative example 1 and comparative examples 1 to 4 that the waste concrete active micro powder prepared by a special method is added into the components, so that the fluidity and the mechanical strength of the grouting material are obviously improved and enhanced, the preparation method of the waste concrete active micro powder is changed, or only the common waste concrete micro powder is selected, and the fluidity and the mechanical strength of the grouting material are relatively unobvious. It can be seen from comparative example 1 and comparative example 5 that the mechanical strength of the grouting material is obviously reduced when quartz sand larger than 70 meshes is lacked. As can be seen from the comparison of example 1 and comparative examples 6-9, the composite fiber prepared by the preparation method of the application has a relatively obvious promotion effect on the mechanical strength of the grouting material.
Claims (10)
1. The sleeve grouting material for connecting the steel bars of the fabricated building is characterized by comprising the following components in parts by weight: 700 portions of cement, 80 to 150 portions of waste concrete active micro powder, 800 portions of quartz sand, 10 to 90 portions of composite fiber and 30 to 110 portions of admixture;
the preparation method of the waste concrete active micro powder comprises the following steps:
s1, crushing the waste concrete with the strength grade not lower than C50 into concrete fragments with the particle size not more than 50mm, and then drying for 2.5h at 400 ℃;
s2, adding a surfactant into the dried concrete blocks, and performing ball milling to obtain particles with the particle size of not more than 0.15 mm;
s3, irradiating the particles obtained in the step S2 for 20min by microwaves with the frequency of 2400MHz, and then grinding the particles together with hydroxy polyaluminium chloride and calcareous quicklime with the particle size of less than 4.75mm until the specific surface area is more than or equal to 500 square meters per kg, thus obtaining the waste concrete active micro powder.
2. The sleeve grouting material for connecting reinforcing steel bars of fabricated buildings according to claim 1, wherein the percentage of the waste concrete active micro powder in the total amount of the sleeve grouting material components is 5-7%.
3. The sleeve grouting material for reinforcing bar connection of prefabricated buildings according to claim 1 or 2, wherein in the step of preparing the waste concrete active micro powder S3, the material irradiated with microwave of 2400MHz frequency comprises uniformly mixing the particles obtained in the step S2 and rice hull ash, and the ratio of the rice hull ash to the particles obtained in the step S2 is 1: 2-6.
4. The sleeve grouting material for reinforcing bar connection of fabricated building according to claim 3, wherein in the preparation step S3 of the waste concrete active micro powder, the ratio of the rice hull ash to the particles obtained in step S2 is 1: 4.
5. The reinforcing bar connecting sleeve grout material as set forth in claim 1 or 2, wherein the surfactant used in the preparation of the waste concrete active fine powder is at least one of alkyl polyglucoside, pentaerythritol stearate, citric acid fatty glyceride and glycerin fatty acid ester.
6. The sleeve grouting material for reinforcing steel bar connection according to claim 1 or 2, wherein the content of alumina in the hydroxyl polyaluminium chloride adopted in the preparation of the waste concrete active micro powder is not less than 75%.
7. The sleeve grouting material for connecting the steel bars according to claim 1 or 2, characterized in that the quartz sand is prepared by grinding common quartz sand for 10-30min, sieving into three different particle sizes of 20-40 mesh, 40-70 mesh and more than 70 mesh, and finally mixing according to the weight ratio of 2-6:1-4: 1.
8. The sleeve grouting material for reinforcing steel bar connection according to claim 1 or 2, wherein the preparation method of the composite fiber comprises the following steps: adding light calcium carbonate and heavy calcium carbonate into the fiber raw material, uniformly mixing, adding molasses and water, uniformly stirring and drying to obtain the composite material;
the fiber raw materials are sepiolite fibers and polyvinyl alcohol fibers, or sepiolite fibers and seaweed fibers.
9. The sleeve grouting material for connecting steel bars according to claim 8, wherein the weight ratio of the sepiolite fibers to the polyvinyl alcohol fibers, or the weight ratio of the sepiolite fibers to the alginate fibers is 1: 1-2;
the total weight of the light calcium carbonate and the heavy calcium carbonate is 5-6 times of that of the fiber raw material, the weight ratio of the light calcium carbonate to the heavy calcium carbonate is 0.5-2.5:1, and the dosage of the molasses is 0.4-0.8% of the total weight of the light calcium carbonate, the heavy calcium carbonate and the fiber raw material.
10. The sleeve grout for reinforcing bar connection according to claim 1 or 2, wherein the admixture comprises: 2-4 parts of a water reducing agent, 20-70 parts of an expanding agent, 0.5-2 parts of a defoaming agent and 5-40 parts of a rust inhibitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010474261.2A CN111517729B (en) | 2020-05-29 | 2020-05-29 | Sleeve grouting material for connecting steel bars of fabricated building |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010474261.2A CN111517729B (en) | 2020-05-29 | 2020-05-29 | Sleeve grouting material for connecting steel bars of fabricated building |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111517729A true CN111517729A (en) | 2020-08-11 |
| CN111517729B CN111517729B (en) | 2022-02-15 |
Family
ID=71911053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010474261.2A Active CN111517729B (en) | 2020-05-29 | 2020-05-29 | Sleeve grouting material for connecting steel bars of fabricated building |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111517729B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113880535A (en) * | 2021-10-29 | 2022-01-04 | 沈阳建筑大学 | Sleeve grouting material for connecting low-temperature cement-based steel bars |
| CN114716174A (en) * | 2022-02-28 | 2022-07-08 | 沈阳建筑大学 | Waste concrete active slag powder and preparation method and application thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007238745A (en) * | 2006-03-08 | 2007-09-20 | Denki Kagaku Kogyo Kk | Grout composition and grout mortar using the same |
| CN104944869A (en) * | 2014-03-31 | 2015-09-30 | 天津天筑建材有限公司 | Grouting material for connecting prefabricated assembled concrete component sleeve |
| CN105236869A (en) * | 2014-07-08 | 2016-01-13 | 上海城建物资有限公司 | Special high strength grouting material for connecting reinforcement sleeve |
| CN106699077A (en) * | 2016-12-19 | 2017-05-24 | 重庆市建筑科学研究院 | Sleeve grouting material for assembly type building steel bar connection |
| CN108947424A (en) * | 2018-08-30 | 2018-12-07 | 成都宏基建材股份有限公司 | A kind of fiber reinforcement reinforcing bar sleeve for connection grouting material and preparation method thereof |
| CN109704607A (en) * | 2019-02-14 | 2019-05-03 | 合肥国瑞集成建筑科技有限公司 | A kind of regeneration concrete micro mist preparation method |
-
2020
- 2020-05-29 CN CN202010474261.2A patent/CN111517729B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007238745A (en) * | 2006-03-08 | 2007-09-20 | Denki Kagaku Kogyo Kk | Grout composition and grout mortar using the same |
| CN104944869A (en) * | 2014-03-31 | 2015-09-30 | 天津天筑建材有限公司 | Grouting material for connecting prefabricated assembled concrete component sleeve |
| CN105236869A (en) * | 2014-07-08 | 2016-01-13 | 上海城建物资有限公司 | Special high strength grouting material for connecting reinforcement sleeve |
| CN106699077A (en) * | 2016-12-19 | 2017-05-24 | 重庆市建筑科学研究院 | Sleeve grouting material for assembly type building steel bar connection |
| CN108947424A (en) * | 2018-08-30 | 2018-12-07 | 成都宏基建材股份有限公司 | A kind of fiber reinforcement reinforcing bar sleeve for connection grouting material and preparation method thereof |
| CN109704607A (en) * | 2019-02-14 | 2019-05-03 | 合肥国瑞集成建筑科技有限公司 | A kind of regeneration concrete micro mist preparation method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113880535A (en) * | 2021-10-29 | 2022-01-04 | 沈阳建筑大学 | Sleeve grouting material for connecting low-temperature cement-based steel bars |
| CN113880535B (en) * | 2021-10-29 | 2023-10-13 | 沈阳建筑大学 | Sleeve grouting material for connecting low-temperature cement-based steel bars |
| CN114716174A (en) * | 2022-02-28 | 2022-07-08 | 沈阳建筑大学 | Waste concrete active slag powder and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111517729B (en) | 2022-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111689752B (en) | Multi-source solid waste base grouting cementing material and preparation method and application thereof | |
| CN110526628B (en) | Preparation method of high-doping-amount wet-grinding phosphorus-solid waste super-retarding cementing material | |
| CN107344840B (en) | Preparation method of phosphorus-based grouting material | |
| KR100884715B1 (en) | Composition of blended cement using high-volume industrial by-products and method of thereof | |
| CN111606637B (en) | Excellent-performance sleeve grouting material for steel bar connection | |
| CN105174887A (en) | Modified desulphurization gypsum-based mater batch and preparation method therefor | |
| CN112456946A (en) | Nano micro-expansion inorganic grouting material and preparation method thereof | |
| CN102503338A (en) | Technique method for producing dry building mortar through industrial solid waste | |
| CN113372029B (en) | Low-carbon type super-sulfate cement, preparation method thereof and cement mortar | |
| CN114988791B (en) | Flue grouting material doped with sulfur-rich lithium slag, and preparation method and application thereof | |
| CN111517729B (en) | Sleeve grouting material for connecting steel bars of fabricated building | |
| CN105198336A (en) | Seashore building cement resisting strong wind and big waves | |
| CN114605121B (en) | Tungsten tailing autoclaved aerated concrete and preparation method thereof | |
| KR101416005B1 (en) | Nature-friendly block using non-sintering inorgarnic binder and manufacturing method thereof | |
| Chang et al. | Ladle furnace slag as a sustainable binder for masonry mortars | |
| CN113880535B (en) | Sleeve grouting material for connecting low-temperature cement-based steel bars | |
| CN102557563A (en) | Low-shrinkage full-tailing fine aggregate sleeper concrete and preparation method thereof | |
| CN115925286A (en) | Low-cost multi-source solid waste filling cementing material and preparation method and application thereof | |
| CN112441765B (en) | Alkali activator, alkali-activated gel material, concrete and preparation method of concrete | |
| CN115108795A (en) | Environment-friendly grouting material based on industrial waste and preparation method thereof | |
| CN108358664B (en) | Cementing material prepared from fly ash and preparation method thereof | |
| CN102060496A (en) | Rock ballast powder aerated concrete and preparation method thereof | |
| CN111302683A (en) | Masonry cement and production process thereof | |
| CN110028295A (en) | A kind of mating grouting material of ECP wallboard and preparation method thereof | |
| CN112429985B (en) | Moderate heat portland cement prepared by utilizing industrial waste residues and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231204 Address after: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee after: Dragon totem Technology (Hefei) Co.,Ltd. Address before: 110168 No. 9 Hunnan East Road, Hunnan District, Shenyang City, Liaoning Province Patentee before: SHENYANG JIANZHU University |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240305 Address after: No. 168 Changgang Middle Road, Haizhu District, Guangzhou City, Guangdong Province, 510000 Patentee after: Guangzhou municipal engineering maintenance Office Co.,Ltd. Country or region after: China Address before: 230000 floor 1, building 2, phase I, e-commerce Park, Jinggang Road, Shushan Economic Development Zone, Hefei City, Anhui Province Patentee before: Dragon totem Technology (Hefei) Co.,Ltd. Country or region before: China |