CN116969698B - Solid waste-based composite cementing material with adjustable performance, and preparation method and application thereof - Google Patents
Solid waste-based composite cementing material with adjustable performance, and preparation method and application thereof Download PDFInfo
- Publication number
- CN116969698B CN116969698B CN202310740718.3A CN202310740718A CN116969698B CN 116969698 B CN116969698 B CN 116969698B CN 202310740718 A CN202310740718 A CN 202310740718A CN 116969698 B CN116969698 B CN 116969698B
- Authority
- CN
- China
- Prior art keywords
- solid waste
- parts
- based composite
- cementing material
- composite cementing
- 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.)
- Active
Links
- 239000000463 material Substances 0.000 title claims abstract description 221
- 239000002910 solid waste Substances 0.000 title claims abstract description 169
- 239000002131 composite material Substances 0.000 title claims abstract description 79
- 238000002360 preparation method Methods 0.000 title abstract description 15
- 239000000654 additive Substances 0.000 claims abstract description 52
- 239000000843 powder Substances 0.000 claims abstract description 40
- 239000002893 slag Substances 0.000 claims abstract description 37
- 239000010440 gypsum Substances 0.000 claims abstract description 31
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 31
- 238000011049 filling Methods 0.000 claims abstract description 28
- 239000002243 precursor Substances 0.000 claims abstract description 19
- 239000002994 raw material Substances 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 8
- 239000010959 steel Substances 0.000 claims abstract description 8
- 239000002585 base Substances 0.000 claims description 55
- 239000000203 mixture Substances 0.000 claims description 46
- 230000000996 additive effect Effects 0.000 claims description 44
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 42
- 239000004568 cement Substances 0.000 claims description 34
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 239000004575 stone Substances 0.000 claims description 22
- 239000004567 concrete Substances 0.000 claims description 18
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims description 15
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 14
- 239000003638 chemical reducing agent Substances 0.000 claims description 13
- 239000002689 soil Substances 0.000 claims description 13
- 238000002156 mixing Methods 0.000 claims description 11
- 239000010881 fly ash Substances 0.000 claims description 10
- 238000000227 grinding Methods 0.000 claims description 10
- 239000003513 alkali Substances 0.000 claims description 9
- 229910021487 silica fume Inorganic materials 0.000 claims description 9
- 150000004683 dihydrates Chemical group 0.000 claims description 8
- 239000004115 Sodium Silicate Substances 0.000 claims description 7
- 239000000292 calcium oxide Substances 0.000 claims description 7
- 235000012255 calcium oxide Nutrition 0.000 claims description 7
- 239000011159 matrix material Substances 0.000 claims description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000004131 Bayer process Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 238000004090 dissolution Methods 0.000 claims description 5
- 239000000945 filler Substances 0.000 claims description 5
- 238000011068 loading method Methods 0.000 claims description 5
- 239000004576 sand Substances 0.000 claims description 5
- 230000000087 stabilizing effect Effects 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000001070 adhesive effect Effects 0.000 abstract description 2
- 230000008929 regeneration Effects 0.000 abstract description 2
- 238000011069 regeneration method Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 17
- 238000001035 drying Methods 0.000 description 11
- 229910052799 carbon Inorganic materials 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 238000000498 ball milling Methods 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 239000002002 slurry Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 208000005156 Dehydration Diseases 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229920000876 geopolymer Polymers 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920005646 polycarboxylate Polymers 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000000979 retarding effect Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 229910018516 Al—O Inorganic materials 0.000 description 1
- 229910018557 Si O Inorganic materials 0.000 description 1
- 229910004283 SiO 4 Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229920000592 inorganic polymer Polymers 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- DGVVJWXRCWCCOD-UHFFFAOYSA-N naphthalene;hydrate Chemical compound O.C1=CC=CC2=CC=CC=C21 DGVVJWXRCWCCOD-UHFFFAOYSA-N 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 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
- C04B7/00—Hydraulic cements
- C04B7/14—Cements containing slag
- C04B7/147—Metallurgical slag
- C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
-
- 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
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
-
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/0075—Uses not provided for elsewhere in C04B2111/00 for road construction
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Processing Of Solid Wastes (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a solid waste-based composite cementing material with adjustable performance, and a preparation method and application thereof, and belongs to the technical field of solid waste regeneration. The raw materials of the adhesive comprise the following components in parts by weight: 5 to 40 parts of alkaline solid waste, 15 to 45 parts of precursor materials, 5 to 10 parts of gypsum, 5 to 20 parts of filling materials and 0 to 10 parts of additives; the precursor material is one or more of blast furnace slag powder, refined slag powder and converter steel slag powder; the particle size of the filling material is 200 meshes or more. The invention can realize the performance regulation and control of the solid waste base rubber composite gel material according to engineering requirements, has high material strength, can meet the requirements of different raw material grade variability, avoids secondary pollution to the environment, can obviously reduce material cost, fully utilizes the solid waste material, protects the environment and saves resources.
Description
Technical Field
The invention belongs to the technical field of solid waste regeneration, and relates to a solid waste-based cementing material, in particular to a solid waste-based composite cementing material with adjustable performance, and a preparation method and application thereof.
Background
The disclosure of this background section is only intended to increase the understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art already known to those of ordinary skill in the art.
Cement production belongs to the industry of high energy consumption and high emission. According to statistics, the carbon emission of the cement industry in 2020 is about 13.5% of the total national carbon emission, and how to realize carbon reduction and carbon reduction in the cement industry is important to realize the aim of double carbon. The low-carbon gel material is used as a potential substitute of the cement material, and the large-scale popularization and application of the low-carbon gel material provide an effective way for solving the problem of double high in the cement industry. Most of the current commonly used low-carbon cementing materials are green cementing materials with little or no clinker formed by taking solid waste materials as main raw materials and combining the proportioning optimization decision of the cementing materials in a chemical excitation, physical excitation or composite excitation mode. The basic principle is that an aluminosilicate material rich in active Si and Al is excited by alkali to form a three-dimensional network structure inorganic polymer consisting of AlO 4 and SiO 4 tetrahedral structural units, namely a geopolymer, which is used for replacing the traditional cement. The solid waste-based cementing material not only can reduce energy consumption and carbon emission in the cement production process, but also can absorb a large amount of solid waste materials, reduces land occupation and environmental pollution caused by solid waste stockpiling, and has the advantage of multiple purposes.
However, long-term research and practical results show that the following problems still exist in the current solid waste-based cementing materials and are to be solved. On one hand, the solid waste base rubber material prepared by the same formula and process has larger performance difference due to the influence of the solid waste raw material generation process, storage environment, raw material difference and the like; secondly, most solid waste-based cementing materials are still activated by adopting a strong alkaline reagent, so that the surface of the material is easy to generate a whiskering phenomenon after hydration reaction, and the problem of secondary environmental pollution exists; furthermore, under the influence of a reaction mechanism, partial solid waste base rubber materials have the condition of slow strength increase and even shrinkage in the later period, and the performance is generally lower than that of the traditional 425 cement; in addition, the cost of the solid waste-based cementing material with high quality performance is high, even exceeds the cost of cement, and the large-scale popularization and application are limited; finally, environmental protection of solid waste-based cementing materials is still a major concern in various industries, and design is required to be started from the selection of raw materials, so that effective solidification of heavy metal ions is realized, and environmental pollution is avoided.
Disclosure of Invention
In order to solve the defects of the prior art, the invention aims to provide the solid waste-based composite cementing material with adjustable performance, and the preparation method and the application thereof.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
according to the first aspect of the invention, a solid waste-based composite cementing material with adjustable performance is provided, and the raw materials comprise, by weight: 5 to 40 parts of alkaline solid waste, 15 to 45 parts of precursor materials, 5 to 10 parts of gypsum, 5 to 20 parts of filling materials and 0 to 10 parts of additives;
the precursor material is one or a mixture of more of blast furnace slag powder, refined slag powder and converter steel slag powder;
The additive comprises an additive A and an additive B, wherein the mass ratio of the additive A to the additive B is as follows: 0 to 0.5:0.2 to 1; the additive A is one or more of sodium hydroxide, potassium hydroxide and sodium silicate; the additive B is one or more of quicklime, P.O425 or P.C425 cement;
the particle size of the filling material is 200 meshes or more.
According to a second aspect of the invention, the preparation method of the solid waste-based composite cementing material with adjustable performance is provided, and comprises the following steps:
(1) Dewatering the alkaline solid waste, gypsum and filling material;
(2) Filling the dehydrated alkaline solid waste and filling materials into a ball mill according to a proportion, and grinding to obtain a primary mixed material;
(3) And (3) loading the primary mixed material, gypsum and the additive into a ball mill according to a proportion for blending to obtain the solid waste base composite cementing material.
In a third aspect of the present invention, there is provided an application of the above-mentioned solid waste-based composite cementitious material with adjustable properties, wherein the above-mentioned solid waste-based composite cementitious material with adjustable properties is used for preparing a solid waste-based rubber material stabilized macadam mixture for road base, a solid waste-based rubber material concrete for prefabricated members or a solid waste-based rubber material stabilized soil mixture for roadbeds.
The beneficial effects of the invention are as follows:
(1) According to the solid waste-based composite cementing material with adjustable performance, through the optimal decision design among the components (the relative stability of the performance is realized by adjusting the content of different solid waste raw materials), the grade variability requirement among different solid waste materials can be met, the stable mechanical performance of the solid waste-based cementing material is ensured, the solid waste-based cementing material is not influenced by the production process and raw materials of the solid waste materials, and the solid waste-based cementing material has better applicability. Through adjusting the types and components of the solid waste raw materials, the properties of the solid waste base rubber material such as strength, setting time and fluidity can be regulated and controlled according to engineering application scenes, the customized design of the solid waste base rubber material is realized, and the application range is wider.
(2) The solid waste-based composite cementing material with adjustable performance is prepared from common industrial solid waste, the alkali content of a solid waste-based rubber material system is adjusted through the additive, the phenomenon of whiskering is prevented, and simultaneously, the solidification of metal ions can be realized, so that secondary pollution to the environment is avoided.
(3) The performance-adjustable solid waste-based composite cementing material system provided by the invention is mainly composed of solid waste materials, the preparation method is simple, the energy consumption is low, a large amount of recycling of the solid waste materials can be realized, and the environmental pollution, land occupation and carbon emission are reduced; the total cost and the processing cost of each component material are far lower than those of common cement, the economic advantage is obvious, and furthermore, the performance of the solid waste-based composite cementing material with adjustable performance is higher than that of the traditional 425 cement.
Detailed Description
Noun interpretation:
grade variability: mainly refers to that solid waste materials in different production places and different batches have certain difference in performance. The invention can be applicable to solid waste materials with different production areas and different batches, and achieves the solid waste-based cementing material with stable performance.
Based on various problems existing in the existing solid waste-based cementing material, the invention provides a solid waste-based composite cementing material with adjustable performance, and a preparation method and application thereof.
The first exemplary embodiment of the invention provides a solid waste-based composite cementing material with adjustable performance, which comprises the following raw materials in parts by weight: 5 to 40 parts of alkaline solid waste, 15 to 45 parts of precursor materials, 5 to 10 parts of gypsum, 5 to 20 parts of filling materials and 0 to 10 parts of additives;
the precursor material is one or a mixture of more of blast furnace slag powder, refined slag powder and converter steel slag powder;
The additive comprises an additive A and an additive B, wherein the mass ratio of the additive A to the additive B is as follows: 0 to 0.5:0.2 to 1; the additive A is one or more of sodium hydroxide, potassium hydroxide and sodium silicate; the additive B is one or more of quicklime, P.O425 or P.C425 cement;
the particle size of the filling material is 200 meshes or more.
In some embodiments of the invention, the refined slag powder used in the invention meets the GB/T33813-2017 standard.
In some embodiments of the invention, the base solid waste adopted by the invention is one or a mixture of more of alkali slag, carbide slag and Bayer process red mud, and the mass ratio is 0-1: 0 to 2:0 to 1. Preferably, the alkali dissolution value of the alkaline solid waste is 9-10.8, and the specific surface area is more than 400m 2/kg.
In some embodiments of the invention, the precursor material adopted by the invention is one or a mixture of more than one of active silicon-aluminum phase-enriched materials such as blast furnace slag powder, refined slag powder, converter steel slag and the like; when the mixture is adopted, the mass ratio of the three is 0.5-1: 0 to 0.5:0 to 0.3. The precursor material is subjected to fracture and recombination of Si-O bonds and Al-O bonds under the action of an alkaline activator (OH -) (in a liquid state), so that a silica-alumina gel material, namely a geopolymer, is generated, and is used for replacing the traditional cement, and has the advantages of high strength, excellent durability, quick setting, acid resistance and the like.
Preferably, the blast furnace slag powder is grade S95 or grade S105.
In some embodiments of the invention, the gypsum used in the present invention is dihydrate desulfurized gypsum with less than 2% impurity content.
In some embodiments of the invention, the filling material used in the invention is one or a mixture of more of fly ash, recycled powder and silica fume; when the mixture is adopted, the mass ratio of the three is 0-1: 0 to 0.8:0 to 0.5. The filling material can fill micro-pores generated in the hydration reaction process, so that the compactness of the material is improved, the mechanical property is improved, and meanwhile, the fluidity of solid waste base rubber material mixtures such as concrete or mortar is improved, and the working performance is improved.
In some embodiments of the present invention, the mass ratio of sodium hydroxide, potassium hydroxide and sodium silicate in the additive a used in the present invention is: 0 to 1.2:0 to 1.2:0 to 0.5. The additive A can provide and adjust the alkaline environment required by the precursor material to carry out the polymerization reaction, and simultaneously prevent the later-stage phenomenon of 'whiskering'.
In some embodiments of the invention, the mass ratio of quicklime, P.O425 or P.C425 cement in the additive B adopted by the invention is 0-0.5: 0.3 to 1:0 to 1.2.
The second exemplary embodiment of the invention provides a preparation method of the solid waste-based composite cementing material with adjustable performance, which comprises the following steps:
(1) Dewatering the alkaline solid waste, gypsum and filling material;
(2) Filling the dehydrated alkaline solid waste and filling materials into a ball mill according to a proportion, and grinding to obtain a primary mixed material;
(3) And (3) loading the primary mixed material, gypsum and the additive into a ball mill according to a proportion for blending to obtain the solid waste base composite cementing material.
In some embodiments of the present invention, in the step (1), the method for dehydrating the alkaline solid waste, the gypsum and the filling material may be a drying method, or a method combining natural air drying, dehydration and drying in a sunlight shed, where the drying temperature is 70-90 ℃, the water content is tested at 30min, 40min, 50min and 60min during drying, and the drying is stopped when the water content reaches below 1%.
In some embodiments of the present invention, in the step (2), the dehydrated alkaline solid waste and the filling material are proportionally put into a ball mill to be ground to form a primary mixed material, the rotation speed of the ball mill is 100rpm, the grinding time is not less than 30min, and the specific surface area of the primary mixed material after grinding is more than 400m 2/kg.
In some embodiments of the present invention, in the step (3), the primary mixed material, the gypsum and the additive are proportionally put into a ball mill, the rotation speed is adjusted to 200rpm, the ball milling test is performed for 40min, the components are fully mixed, the inclination angle of the ball mill is adjusted to 3 degrees, and the maximum ball milling temperature is 80 degrees, so as to obtain the solid waste base composite cementing material.
The third exemplary embodiment of the invention provides an application of the solid waste-based composite cementing material with adjustable performance, which is used for preparing solid waste-based rubber material stabilized macadam mixture for road base, solid waste-based rubber material concrete for prefabricated parts or solid waste-based rubber material stabilized soil mixture for roadbeds.
In some embodiments of the present invention, the road base stabilizing macadam mixture for a solid waste base rubber material includes: the solid waste-based composite cementing material with adjustable performance comprises the solid waste-based composite cementing material, graded broken stone and water. The quality of the solid waste-based composite cementing material with adjustable performance is 4-6% of the dry quality of graded broken stone, and the quality of water is 6-8% of the sum of the solid waste-based composite cementing material with adjustable performance and the dry quality of graded broken stone.
Preferably, the medium-grade broken stone of the solid waste base rubber material stabilized broken stone mixture for the road base comprises the following particle sizes in percentage by mass: 35-45% of 0-4.75 mm, 31-41% of 4.75-16 mm and 19-29% of 16-26.5 mm.
Preferably, the preparation method of the solid waste base rubber material stabilized macadam mixture for the road base comprises the following steps: mixing the solid waste-based composite cementing material with adjustable performance, graded broken stone and water according to a proportion.
In some embodiments of the present invention, the solid waste base rubber material concrete for a prefabricated member includes: 320-450 parts of the solid waste-based composite cementing material with adjustable performance, 1000-1200 parts of graded broken stone, 500-800 parts of river sand, water and a water reducing agent. The water content is 30-42% of the quality of the solid waste-based composite cementing material with adjustable performance; the content of the water reducer is 0.5-2% of the mass of the solid waste matrix composite cementing material with adjustable performance.
Preferably, the intermediate-grade mixed broken stone for the solid waste base rubber material concrete for the prefabricated part consists of the following particle sizes in percentage by mass: the proportion of 5 mm-10 mm is 40%, and the proportion of 10 mm-15 mm or 10 mm-20 mm is 60%.
Preferably, the water reducing agent is a polycarboxylate water reducing agent or a naphthalene water reducing agent.
Preferably, the preparation method of the solid waste base rubber material concrete for the prefabricated part comprises the following steps: mixing the solid waste-based composite cementing material with adjustable performance, graded broken stone, river sand, water and a water reducing agent according to a proportion.
In some embodiments of the present invention, the solid waste base rubber material stabilized soil mixture for roadbed includes: 2-6 parts of the solid waste base composite cementing material with adjustable performance, 94-98 parts of filler soil and water. The mass of the water is 8-12% of the sum of the solid waste-based composite cementing material with adjustable performance and the dry mass of the filler soil.
Preferably, the preparation method of the solid waste base rubber material stabilized soil mixture for the roadbed comprises the following steps: mixing the solid waste-based composite cementing material with adjustable performance, filler soil and water in proportion to obtain the composite cementing material.
In order to enable those skilled in the art to more clearly understand the technical scheme of the present invention, the technical scheme of the present invention will be described in detail with reference to specific embodiments.
Example 1
The early-strength solid waste-based composite cementing material comprises the following raw materials in parts by weight: 5 parts of alkaline solid waste, 35 parts of precursor materials, 10 parts of gypsum, 20 parts of filling materials and 10 parts of additives.
Wherein the alkaline solid waste is alkaline residue, and the alkali dissolution value is 10.8. The precursor material is a mixture of S95-level blast furnace slag powder and refined slag powder, and the mass ratio of the two is 0.6:0.4. the gypsum is dihydrate desulfurized gypsum. The filling material is a mixture of fly ash and silica fume, and the mass ratio of the fly ash to the silica fume is 0.8:0.2. the additive is additive B, and the mass ratio of the components is 0.2:1 with p.o425 cement.
The preparation method of the early-strength solid waste-based composite cementing material in the embodiment comprises the following steps:
(1) And (3) putting the alkaline residue, the dihydrate desulfurized gypsum, the fly ash and the silica fume into drying equipment at 80 ℃ for dehydration treatment, wherein the drying time is 40min, and the water content of the dried materials is 0.8%, 0.5%, 1% and 1% respectively.
(2) And (3) proportionally loading the dried alkaline residue, the dried fly ash and the dried silica fume into a ball mill for grinding for 30min, wherein the specific surface area of the ground primary mixed material is 420m 2/kg.
(3) And (3) putting the primary mixed material, the desulfurized gypsum, the S95-level slag powder, the refined slag powder, the quicklime and the P.O425 cement into a ball mill according to a proportion, mixing, wherein the ball milling temperature is 70 ℃, the ball milling time is 40min, and the rotating speed is 200rpm, so as to form the strong solid waste base composite cementing material.
The early-strength solid waste-based composite cementing material prepared in the embodiment is prepared according to a water-gel ratio of 0.4 to form a clear slurry test piece with the thickness of 40mm multiplied by 40mm, and the clear slurry test piece is cured under standard curing conditions to test the compressive strength of 3d, 7d and 28 d.
Example 2
The delayed coagulation type solid waste matrix composite cementing material comprises the following raw materials in parts by weight: 35 parts of alkaline solid waste, 40 parts of precursor materials, 5 parts of gypsum, 15 parts of filling materials and 8 parts of additives.
Wherein, the alkaline solid waste is carbide slag, and the alkali dissolution value is 9. The precursor material is a mixture of S105-level slag powder of a blast furnace and steel slag powder of a converter, and the mass ratio of the two is 1:0.2. the gypsum is dihydrate desulfurized gypsum. The filling material is a mixture of fly ash and recycled powder, and the mass ratio of the fly ash to the recycled powder is 0.5:0.5. the additive is a mixture of additive A and additive B, and the mass ratio is 0.2:0.8. the additive A is sodium hydroxide, the additive B is a mixture of quicklime, P.O425 cement and P.C425 cement, and the mass ratio is 0.5:0.5:1.
The preparation method of the retarding solid waste matrix composite cementing material in the embodiment comprises the following steps:
(1) Placing carbide slag, dihydrate desulfurized gypsum, fly ash and reclaimed powder into drying equipment at 90 ℃ for dehydration treatment, wherein the drying time is 50min, and the water content of the dried materials is 0.7%, 0.4%, 1% and 1% respectively;
(2) And (3) proportionally loading the dried carbide slag, the fly ash and the reclaimed powder into a ball mill for grinding for 40min, wherein the specific surface area of the primary mixed material obtained after grinding is 400m 2/kg.
(3) And (3) mixing the primary mixed material, the desulfurized gypsum, the S105-level slag powder, the converter steel slag powder and the additive in a ball mill according to a proportion, wherein the ball milling maximum temperature is 60 ℃, the ball milling time is 60min, and the rotating speed is 200rpm, so that the retarding solid waste matrix composite cementing material is formed.
The retarder type solid waste base composite cementing material prepared in the embodiment is prepared to form a clear slurry test piece with the water-gel ratio of 0.4 and the size of 40mm multiplied by 40mm, and the clear slurry test piece is cured under standard curing conditions to test the compressive strength of 3d, 7d and 28 d.
Example 3
The common solid waste-based composite cementing material comprises the following raw materials in parts by weight: 17 parts of alkaline solid waste, 35 parts of precursor materials, 5 parts of desulfurized gypsum, 15 parts of filling materials and 5 parts of additives.
Wherein the alkaline solid waste is Bayer process red mud, and the alkali dissolution value is 10.4. The precursor material is S95-level slag powder. The gypsum is dihydrate desulfurized gypsum. The filling material is a mixture of recycled powder and silica fume, and the mass ratio of the recycled powder to the silica fume is 0.8:0.3. the additive is a mixture of additive A and additive B, and the mass ratio is 0.5:0.5. the additive A is a mixed material of sodium hydroxide and sodium silicate, and the mass ratio of the sodium hydroxide to the sodium silicate is 0.5:0.5. the additive B is a mixture of P.O425 cement and P.C425 cement, and the mass ratio is 0.3:0.9.
The preparation method of the common solid waste matrix composite cementing material in the embodiment comprises the following steps:
(1) The Bayer process red mud, the dihydrate desulfurized gypsum and the reclaimed powder are put into a drying device at 90 ℃ for dehydration treatment, the drying time is 60min, and the water content of the dried material is 0.9%, 0.5% and 1% respectively;
(2) The dried Bayer process red mud and the recycled powder are proportionally put into a ball mill for grinding for 30min, and the specific surface area of the primary mixed material obtained after grinding is 400m 2/kg.
(3) And (3) putting the primary mixed material, the desulfurized gypsum, the S95-level slag powder, the silica fume and the additive into a ball mill according to a proportion, mixing, wherein the ball milling maximum temperature is 70 ℃, the ball milling time is 50min, and the rotating speed is 200rpm, so that the common solid waste base composite cementing material is formed.
The general solid waste based composite cementing material prepared in the embodiment is prepared according to the water-gel ratio of 0.4 to form a clear slurry test piece with the thickness of 40mm multiplied by 40mm, and the clear slurry test piece is cured under standard curing conditions to test the compressive strength of 3d, 7d and 28 d.
Comparative example 1
The comparative example was a P.C425 cement, and a clear paste test piece of 40mm by 40mm was prepared according to a water-cement ratio of 0.4, and cured under standard curing conditions to test compressive strengths of 3d, 7d and 28 d.
Table 1 the net pulp strength test results of the net pulp test pieces prepared in examples 1 to 3 and comparative example 1
Example 4
The embodiment is a solid waste base rubber material stabilized macadam mixture for a road base, which is prepared by adopting the early-strength solid waste base composite cementing material in the embodiment 1, and the compactness is 98%.
The road base is with solid useless base gum material stabilized macadam mixture includes: the early-strength solid waste-based composite cementing material prepared in example 1, graded broken stone and water. The content of the early-strength solid waste-based composite cementing material in the solid waste-based rubber material stabilized macadam mixture for the road base is 5% of the dry mass of graded macadam. The water content in the solid waste rubber material stabilized macadam mixture for the road base is 6.3% of the sum of the dry mass of the early-strength solid waste composite cementing material and the graded macadam. The crushed stone grading in the solid waste rubber-based material stabilized crushed stone mixture for the road base comprises the following particle sizes in percentage by mass: 40% of 0-4.75 mm, 36% of 4.75-16 mm and 24% of 16-26.5 mm.
The solid waste base rubber material stabilized macadam mixture for the road base is prepared by mixing the early-strength solid waste base composite cementing material prepared in the embodiment 1, graded macadam and water in proportion.
Example 5
This example is a solid waste-based cement concrete for prefabricated parts, which is prepared by using the early-strength solid waste-based composite cementing material in example 1.
The solid waste base rubber material concrete for the prefabricated part comprises: 380 parts of the early-strength solid waste-based composite cementing material prepared in the embodiment 1, 1060 parts of graded broken stone, 800 parts of river sand, water and a water reducing agent. The medium-grade mixed broken stone of the solid waste base rubber material concrete consists of the following particle sizes in percentage by mass: 5 mm-10 mm accounts for 40%,10 mm-20 mm accounts for 60%. The water content in the solid waste base rubber material concrete for the prefabricated part is 41% of the mass of the early-strength solid waste base composite cementing material. The content of the water reducer in the solid waste rubber material concrete is 1% of the mass of the early-strength solid waste composite cementing material, and the water reducer is a polycarboxylate water reducer.
The solid waste-based adhesive concrete for the prefabricated part is prepared by mixing the early-strength solid waste-based composite cementing material, graded broken stone, river sand, water and a water reducing agent prepared in the embodiment 1 in proportion.
Example 6
The embodiment is a solid waste base rubber material stabilized silt mixture for roadbed, which is prepared by adopting the early-strength solid waste base composite cementing material in the embodiment 1.
The solid waste base rubber material stabilized soil mixture for the roadbed comprises the following components: 4 parts of the early-strength solid waste matrix composite cementing material prepared in the example 1, 96 parts of silt and water. The water content in the solid waste rubber material stabilized soil mixture for the roadbed is 8% of the sum of the mass of the early-strength solid waste composite cementing material and the dry mass of the silt.
Comparative example 2
A cement stabilized macadam mixture for a road base is different from example 4 in that the cementing material is P.C425 cement, and the water content is 6% of the total dry mass of cement and graded macadam.
Comparative example 3
The cement concrete for the prefabricated parts is different from example 5 in that the kind of cementing material is p.c425 cement.
Comparative example 4
The solid waste base rubber material stabilized silt mixture for roadbed is different from the embodiment 6 in that the type of the cementing material is P.C425 cement, and the water content is 8.5 percent of the sum of the dry mass of the early-strength solid waste base composite cementing material and the silt.
Examples 4 and 6 and comparative examples 2 and 4 were subjected to 7d unconfined compressive strength tests according to JTG E51-2009, highway engineering inorganic binder stabilizing material test procedure, and examples 5 and comparative example 3 were subjected to concrete 3d, 7d and 28d compressive strength tests according to JTG3420-2020, highway engineering cement-based cement concrete test procedure.
TABLE 2 results of Strength tests for examples 4-6 and comparative examples 2-4
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The solid waste-based composite cementing material with adjustable performance is characterized by comprising the following raw materials in parts by weight: 5 to 40 parts of alkaline solid waste, 15 to 45 parts of precursor materials, 5 to 10 parts of gypsum, 5 to 20 parts of filling materials and 0 to 10 parts of additives;
the precursor material is one or a mixture of more of blast furnace slag powder, refined slag powder and converter steel slag powder;
The additive comprises an additive A and an additive B, wherein the mass ratio of the additive A to the additive B is as follows: 0 to 0.5:0.2 to 1; the additive A is one or more of sodium hydroxide, potassium hydroxide and sodium silicate; the additive B is one or more of quicklime, P.O425 and P.C425 cement;
The particle size of the filling material is 200 meshes or more;
The alkaline solid waste material is one or a mixture of more of alkaline residue, carbide slag and Bayer process red mud, and the mass ratio is 0-1: 0 to 2:0 to 1;
The mass ratio of the sodium hydroxide, the potassium hydroxide and the sodium silicate in the additive A is as follows: 0 to 1.2:0 to 1.2:0 to 0.5;
The mass ratio of the quicklime to the P.O425 to the P.C425 cement in the additive B is 0-0.5: 0.3 to 1:0 to 1.2.
2. The adjustable solid waste based composite cementing material according to claim 1, wherein the alkali dissolution value of the alkali solid waste is 9-10.8.
3. The solid waste based composite cementing material with adjustable performance according to claim 1, wherein when the precursor material is a mixture, the mass ratio of the blast furnace slag powder, the refined slag powder and the converter steel slag powder is 0.5-1: 0 to 0.5:0 to 0.3.
4. The adjustable solid waste based composite cementitious material of claim 1, wherein the blast furnace slag powder is grade S95 or grade S105.
5. The adjustable solid waste based composite cementing material according to claim 1, wherein the gypsum is dihydrate desulfurized gypsum with an impurity content of less than 2%.
6. The solid waste based composite cementing material with adjustable performance according to claim 1, wherein the filling material is one or a mixture of more of fly ash, recycled powder and silica fume, and the mass ratio is 0-1: 0 to 0.8:0 to 0.5.
7. The method for preparing the solid waste based composite cementing material with adjustable performance according to any one of claims 1 to 6, which is characterized by comprising the following steps:
(1) Dewatering the alkaline solid waste, gypsum and filling material;
(2) Filling the dehydrated alkaline solid waste and filling materials into a ball mill according to a proportion, and grinding to obtain a primary mixed material;
(3) And (3) loading the primary mixed material, gypsum, precursor materials and additives into a ball mill according to a proportion for blending to obtain the solid waste matrix composite cementing material.
8. The use of a performance-adjustable solid waste-based composite cementitious material according to any one of claims 1 to 6, characterized in that the performance-adjustable solid waste-based composite cementitious material according to any one of claims 1 to 6 is used for preparing a solid waste-based rubber material stabilized macadam mixture for road base, a solid waste-based rubber material concrete for prefabricated parts or a solid waste-based rubber material stabilized soil mixture for roadbeds.
9. The use according to claim 8, wherein the road base stabilizing macadam mix for solid waste base rubber material comprises: the adjustable performance solid waste based composite cementitious material, graded crushed stone and water of any one of claims 1-6; the quality of the solid waste-based composite cementing material with adjustable performance is 4-6% of the dry quality of graded broken stone, and the quality of water is 6-8% of the sum of the solid waste-based composite cementing material with adjustable performance and the dry quality of graded broken stone;
Or, the solid waste base rubber material concrete for the prefabricated part comprises: 320-450 parts of the solid waste based composite cementing material with adjustable performance, 1000-1200 parts of graded broken stone, 500-800 parts of river sand, water and a water reducing agent according to any one of claims 1-6; the water content is 30-42% of the quality of the solid waste-based composite cementing material with adjustable performance; the content of the water reducer is 0.5-2% of the mass of the solid waste-based composite cementing material with adjustable performance;
Or, the solid waste base rubber material stabilized soil mixture for the roadbed comprises: 2-6 parts of the solid waste based composite cementing material with adjustable performance, 94-98 parts of filler soil and water according to any one of claims 1-6; the mass of the water is 8-12% of the sum of the solid waste-based composite cementing material with adjustable performance and the dry mass of the filler soil.
10. The use according to claim 9, characterized in that the graded broken stone in the solid waste base rubber material stabilized broken stone mixture for road base is composed of the following particle sizes in percentage by mass: 35-45% of 0-4.75 mm, 31-41% of 4.75-16 mm and 19-29% of 16-26.5 mm;
or the intermediate-grade mixed broken stone of the solid waste base rubber material concrete for the prefabricated part consists of the following particle sizes in percentage by mass: the proportion of 5 mm-10 mm is 40%, and the proportion of 10 mm-15 mm or 10 mm-20 mm is 60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310740718.3A CN116969698B (en) | 2023-06-21 | 2023-06-21 | Solid waste-based composite cementing material with adjustable performance, and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310740718.3A CN116969698B (en) | 2023-06-21 | 2023-06-21 | Solid waste-based composite cementing material with adjustable performance, and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116969698A CN116969698A (en) | 2023-10-31 |
| CN116969698B true CN116969698B (en) | 2024-05-03 |
Family
ID=88470267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310740718.3A Active CN116969698B (en) | 2023-06-21 | 2023-06-21 | Solid waste-based composite cementing material with adjustable performance, and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116969698B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111689752A (en) * | 2020-05-28 | 2020-09-22 | 山东大学 | Multi-source solid waste base grouting cementing material and preparation method and application thereof |
| WO2021219058A1 (en) * | 2020-04-29 | 2021-11-04 | 青岛理工大学 | Recycled material floor tile and preparation method therefor |
| CN113754374A (en) * | 2021-09-07 | 2021-12-07 | 中国恩菲工程技术有限公司 | Low-clinker ultra-high performance concrete and preparation method thereof |
| CN114702294A (en) * | 2022-04-02 | 2022-07-05 | 山东高速工程检测有限公司 | Solid waste based super-retarding cementing material and preparation method and application thereof |
| CN115321848A (en) * | 2022-08-05 | 2022-11-11 | 段崇国 | Full-solid waste-based low-carbon green ecological cementing material and manufacturing method thereof |
| CN115925299A (en) * | 2022-12-28 | 2023-04-07 | 内蒙古鄂尔多斯电力冶金集团股份有限公司 | Full-solid waste self-excited alkaline cementing material and preparation method thereof |
-
2023
- 2023-06-21 CN CN202310740718.3A patent/CN116969698B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021219058A1 (en) * | 2020-04-29 | 2021-11-04 | 青岛理工大学 | Recycled material floor tile and preparation method therefor |
| CN111689752A (en) * | 2020-05-28 | 2020-09-22 | 山东大学 | Multi-source solid waste base grouting cementing material and preparation method and application thereof |
| CN113754374A (en) * | 2021-09-07 | 2021-12-07 | 中国恩菲工程技术有限公司 | Low-clinker ultra-high performance concrete and preparation method thereof |
| CN114702294A (en) * | 2022-04-02 | 2022-07-05 | 山东高速工程检测有限公司 | Solid waste based super-retarding cementing material and preparation method and application thereof |
| CN115321848A (en) * | 2022-08-05 | 2022-11-11 | 段崇国 | Full-solid waste-based low-carbon green ecological cementing material and manufacturing method thereof |
| CN115925299A (en) * | 2022-12-28 | 2023-04-07 | 内蒙古鄂尔多斯电力冶金集团股份有限公司 | Full-solid waste self-excited alkaline cementing material and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116969698A (en) | 2023-10-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107265966B (en) | It is a kind of to prepare bridge self-compaction cracking resistance clear-water concrete using high fine powder content Machine-made Sand | |
| CN109704695B (en) | Early-strength cast-in-situ reactive powder concrete and preparation method thereof | |
| CN109678433B (en) | Ultrahigh-strength self-compacting micro-expansion steel pipe concrete and preparation method thereof | |
| CN111825406A (en) | Phosphogypsum-based self-leveling mortar | |
| CN103613303A (en) | Modified limestone powder high-performance mineral admixture and preparation method thereof | |
| CN113698164B (en) | Anti-cracking anti-settling road water-stabilizing layer material and preparation method thereof | |
| CN114804675B (en) | Composite alkali-activated cementing material and preparation method thereof | |
| CN109896770B (en) | Concrete reinforcing agent | |
| CN114368953A (en) | Low-carbon green ultra-high performance concrete and preparation method thereof | |
| CN111848035A (en) | Grouting material for connecting reinforcing steel bar sleeve and preparation method and application thereof | |
| Wang et al. | Ultra-high performance concrete: Mix design, raw materials and curing regimes-A review | |
| CN111807792A (en) | Quartz glass powder plastic concrete and preparation method thereof | |
| CN113336489B (en) | Method for mixing proportion of machine-made sand self-compacting lightweight aggregate concrete | |
| CN112592131B (en) | Ultrathin layer masonry mortar special for sintered blocks prepared from recycled fine powder containing red bricks | |
| CN113800840A (en) | Low-temperature pipeline grouting material based on solid waste source high-activity powder material and preparation method thereof | |
| CN106587817B (en) | A kind of preparation method of high-adaptability concrete | |
| CN112919870A (en) | High-strength self-compacting concrete with recycled fine aggregate | |
| CN116969698B (en) | Solid waste-based composite cementing material with adjustable performance, and preparation method and application thereof | |
| CN116177974A (en) | Phosphogypsum-based self-compacting backfill for machine-made sand tailing slurry, and preparation method and application thereof | |
| CN113735537A (en) | Grouting material for pavement and preparation method thereof | |
| CN113603413A (en) | Concrete filling material for coal mine underground gob-side entry retaining and preparation method thereof | |
| CN112125612A (en) | Low-temperature-difference large-volume concrete suitable for elephant trunk construction and preparation process thereof | |
| CN115321930B (en) | Self-leveling mortar of modified beta phosphogypsum-based waste concrete reclaimed sand and preparation method thereof | |
| CN116332611B (en) | Premixed fluidized solidified soil and preparation method thereof | |
| CN115057638B (en) | Hydrated calcium silicate and hydrated magnesium silicate cementing material for mine filling 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 |