CN115521112A - Ultrahigh-performance anti-abrasion concrete - Google Patents
Ultrahigh-performance anti-abrasion concrete Download PDFInfo
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- 239000004567 concrete Substances 0.000 title claims abstract description 91
- 238000005299 abrasion Methods 0.000 title claims abstract description 59
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 44
- 239000004576 sand Substances 0.000 claims abstract description 17
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 16
- WHGYBXFWUBPSRW-FOUAGVGXSA-N beta-cyclodextrin Chemical compound OC[C@H]([C@H]([C@@H]([C@H]1O)O)O[C@H]2O[C@@H]([C@@H](O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O[C@H]3O[C@H](CO)[C@H]([C@@H]([C@H]3O)O)O3)[C@H](O)[C@H]2O)CO)O[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@@H]3O[C@@H]1CO WHGYBXFWUBPSRW-FOUAGVGXSA-N 0.000 claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 10
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000008262 pumice Substances 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000003469 silicate cement Substances 0.000 claims abstract description 6
- 229920000858 Cyclodextrin Polymers 0.000 claims abstract description 5
- 239000001116 FEMA 4028 Substances 0.000 claims abstract description 5
- 235000011175 beta-cyclodextrine Nutrition 0.000 claims abstract description 5
- 229960004853 betadex Drugs 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims description 5
- 229920000877 Melamine resin Polymers 0.000 claims description 3
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical group NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 20
- 239000003795 chemical substances by application Substances 0.000 abstract description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000005336 cracking Methods 0.000 abstract description 3
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 16
- 238000003756 stirring Methods 0.000 description 15
- 239000012615 aggregate Substances 0.000 description 14
- 238000010276 construction Methods 0.000 description 14
- 239000004568 cement Substances 0.000 description 8
- 238000009991 scouring Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000003628 erosive effect Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 239000004575 stone Substances 0.000 description 5
- 201000010099 disease Diseases 0.000 description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000010881 fly ash Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- WPJGWJITSIEFRP-UHFFFAOYSA-N 1,3,5-triazine-2,4,6-triamine;hydrate Chemical group O.NC1=NC(N)=NC(N)=N1 WPJGWJITSIEFRP-UHFFFAOYSA-N 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 239000011398 Portland cement Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001818 nuclear effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000011863 silicon-based powder Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000979 retarding effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000010878 waste rock 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
- 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/2038—Resistance against physical degradation
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses ultra-high performance anti-abrasion concrete, which comprises the following raw materials in percentage by weight of concrete: low heat silicate cement 290-330 kg/m 3 8.5-12.5 kg/m metakaolin 3 Pumice powder 25-35 kg/m 3 738-765 kg/m of basalt sand 3 Basalt aggregate 1200-1350 kg/m 3 1.2-3.6 kg/m basalt chopped fiber 3 Beta-cyclodextrin 0.12-0.32 kg/m 3 0.05-0.15 kg/m of graphene oxide 3 2.58-3.65 kg/m of water reducing agent 3 And the balance water. The ultra-high performance anti-abrasion concrete developed by adopting the scheme abandons the concept of air entraining of the traditional concrete, does not mix an air entraining agent in the formula, and forms novel anti-abrasion concrete with high strength, high compactness, strong durability, low cracking property and strong anti-abrasion capability by means of chemical reaction and synergistic action among all components of the material.
Description
Technical Field
The invention relates to the technical field of building materials, in particular to ultra-high-performance anti-abrasion concrete.
Background
The hydraulic dam concrete has the advantages of large volume, large concrete pouring amount, high engineering investment occupation ratio, complex engineering construction and construction conditions, and many key technical problems of concrete construction of the hydraulic dam, such as concrete cracks in construction period, structural freeze-thaw damage in operation period, high-speed sand-containing water flow, bed load scouring abrasion damage and the like, especially in high and cold regions of Qinghai-Tibet plateau, the hydraulic concrete construction is under adverse weather conditions of low annual average temperature, dry climate, high annual freeze-thaw cycle times, large annual temperature amplitude, large daily amplitude, frequent sudden temperature drop and the like, and the engineering construction operation environment is severe, so that the problems are more prominent.
Major projects of China for developing water energy resources are mostly concentrated in the regions of southwest and Tibet, particularly the regions of Sichuan, yunnan and Tibet, and power stations which are developed in an important way are mainly distributed in Jinshajiang, yangtze, minjiang, yashui, lancang, hongshui and Yalu Tibet. The river course of the rivers has steep slopes and outstanding silt problems, and particularly, stones in the water flow are abundant, the particle size distribution is wide, and the water-power engineering is seriously damaged by scouring. The erosion abrasion and cavitation damage of high-speed water flow containing sand and stone to concrete on the flow passing surface of a hydraulic building are common diseases of hydraulic drainage buildings such as overflow dams, flood discharging tunnels (tanks), sluice gates and the like. In particular, when the flow rate is high and suspended matter (silt) or bed load (stone) is carried in the water flow, the erosion and cavitation of the building are more serious. According to investigation, nearly 70% of projects of large concrete dams have such diseases in the operation process, particularly, due to the fact that the contents of silt and bed load are large, the water flow speed is high, the problems of erosion and cavitation of outlet structures become one of the main diseases in the operation of some hydropower stations, and some of the problems even endanger the engineering safety, of the large hydropower stations on the yellow river main flow and the water conservancy and hydropower projects in southwest regions.
In the prior art, the following several publications are listed: invention patent 1 (patent number: CN 202011085321.8): the invention researches and develops high-strength high-crack-resistance abrasion-resistant concrete using basalt excavating materials as aggregate, wherein the concrete comprises the following components in parts by weight: 246-294 parts of low-heat portland cement; 43-83 parts of I-grade fly ash; 629 to 694 parts by weight of artificial sand produced from basalt excavating material; 1346 to 1469 weight parts of crushed stone produced by basalt excavating material; 110 to 126 portions of water; 2.026-2.936 portions of retarding polycarboxylic acid high-performance water reducing agent; 0.023 to 0.033 weight portion of air entraining agent. The invention provides high-strength high-crack-resistance anti-abrasion concrete using basalt excavating materials as aggregates and a preparation method thereof, which not only solve the problems that the excavating materials of a cavern of hydropower engineering occupy a construction site and waste rock mineral resources in stacking, but also economically and effectively solve the contradiction between the high strength and the high crack resistance of the hydraulic anti-abrasion concrete in terms of mix proportion design.
Invention patent 2 (patent No. CN 202010411831.3): the invention discloses high-strength low-elasticity hydraulic engineering abrasion-resistant concrete which comprises the following components in parts by weight: 270-310 kg/m cement 3 170-200 kg/m of superfine mineral powder 3 1100-1300 kg/m of crushed stone 3 460-500 kg/m river sand 3 50-70 kg/m of modified rubber powder 3 100-120 kg/m of high molecular polymer emulsion 3 9-12 kg/m of water reducing agent 3 70-100 kg/m of water 3 . According to the invention, by introducing the superfine mineral powder, the modified rubber powder and the high-molecular polymer emulsion into the hydraulic concrete, the hydraulic concrete has excellent performance of resisting small-angle cutting and large-angle impact while ensuring the mechanical property, realizes effective unification of high strength, low elasticity, wear resistance and impact resistance, and effectively ensures the service performance and durability of the hydraulic concrete; and the related preparation method is simple, has low cost and is suitable for popularization and application.
Invention patent 3 (patent No. CN 202210524477.4): the invention relates to high-strength high-crack-resistance hydraulic abrasion-resistant concrete and a preparation method thereof, wherein the raw materials of the concrete comprise the following components in percentage by weight: 125-138 kg/m of water 3 272-315 kg/m of cement 3 68.1-78.9 kg/m of fly ash 3 0.9kg/m of fiber 3 27.3-28.6 kg/m silicon powder 3 Fine aggregate 738-764 kg/m 3 And coarse aggregate 1137-1178 kg/m 3 2.94-4.73 kg/m of water reducing agent 3 0.0257-0.0591 kg/m of air entraining agent 3 (ii) a Firstly, adding coarse aggregate, cement, fly ash, silica powder, fine aggregate and fiber into a stirrer in sequence, uniformly stirring for 60-80 s, simultaneously adding a water reducing agent and an air entraining agent into mixing water, uniformly mixing, and slowly adding the mixed solution into the mixed material within 10sFully mixing and stirring for 90-120 s to obtain high-strength and high-crack-resistance hydraulic abrasion-resistant concrete; the invention has the advantages of high strength, excellent abrasion resistance, good crack resistance and the like, and greatly reduces the construction cost and the later operation and maintenance cost of enterprises.
The main disadvantages of the above three patents: the three materials do not develop corresponding anti-abrasion concrete for alpine and high-altitude areas. Therefore, it is necessary to develop an ultra-high performance anti-abrasion concrete suitable for alpine and high-altitude areas to improve the scouring resistance and prolong the service life of hydraulic engineering water-passing buildings.
Disclosure of Invention
Compared with the defects of the prior art, the invention aims to provide the ultra-high performance anti-abrasion concrete, the ultra-high performance anti-abrasion concrete developed by adopting the scheme abandons the concept of traditional concrete air entraining, does not mix an air entraining agent in a formula, and forms novel anti-abrasion concrete with high strength, high compactness, strong durability, low cracking property and strong anti-abrasion capability by means of chemical reaction and synergistic action among all components of materials.
The invention is realized by the following technical scheme:
the ultra-high performance anti-abrasion concrete comprises the following raw materials in percentage by weight of concrete per square: low heat silicate cement 290-330 kg/m 3 8.5-12.5 kg/m metakaolin 3 Pumice powder 25-35 kg/m 3 738-765 kg/m of basalt sand 3 Basalt aggregate 1200-1350 kg/m 3 1.2-3.6 kg/m of basalt chopped fiber 3 Beta-cyclodextrin 0.12-0.32 kg/m 3 0.05-0.15 kg/m of graphene oxide 3 2.58-3.65 kg/m of water reducing agent 3 And the balance water.
Further optimizing, the particle size of the basalt aggregate is 5-20 mm.
Further optimizing, the particle size of the basalt sand is 2-3 mm.
Further optimizing, the beta-cyclodextrin is KH560 modified beta-cyclodextrin.
And further optimizing, wherein the water reducing agent is a melamine water reducing agent.
Further optimized, the using amount of the water is 55-85 kg/m 3 。
Further optimization, the concrete is applied to high-cold high-altitude areas.
Compared with the prior art, in the high-cold high-altitude areas, due to the fact that the sediment and bed load content is large, the water flow speed is high, the problems of scouring and cavitation erosion of water release buildings become one of main diseases in operation of some hydropower stations, and the problems of scouring and cavitation erosion of the water release buildings even endanger the engineering safety are solved.
The three admixtures of the thermal portland cement, the pumice powder, the metakaolin and the like are used as cementing materials to mutually perform chemical reaction, and simultaneously, the high-strength basalt sand, the aggregate and the cementing materials react to provide an anti-abrasion and strength foundation for the ultra-high-performance anti-abrasion concrete.
The modified beta-cyclodextrin can improve the workability of the abrasion-resistant concrete so as to improve the construction performance.
The basalt chopped fibers and the graphene oxide can improve the microstructure of concrete, the basalt chopped fibers play a role in bridging and overlapping in the concrete, the graphene oxide condensation nuclear effect can adjust the crystal structure of a cement-based material, improve the micro cracks of the concrete, reduce the permeability coefficient of the concrete, improve the compactness of the concrete, and greatly improve the durability and the crack resistance of the anti-abrasion concrete.
The melamine high-efficiency water reducing agent can obviously improve the working performance of concrete and has the characteristics of high water reducing rate, obvious early strength effect, low air entraining property, less environmental pollution in the production process and the like.
The concrete is suitable for parts with high requirements on abrasion resistance, such as diversion tunnels, flood discharge tunnels, conservation staffs, stilling pools, plunge pools, overflow surfaces, spillways, sand washing gates and the like, can obviously improve the abrasion resistance and the freeze-thaw damage resistance of hydraulic engineering flood discharge buildings, and prolongs the service life of the hydraulic engineering buildings.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the abrasion resistance is as follows: the method resists the washing of bed ballast with the grain diameter of 8cm-50cm in the high-cold high-altitude area, and after two flood periods, the repaired part is not obviously damaged, so that the effect is good; the 28d impact and abrasion resistance strength is more than or equal to 30 h/(g/cm) 2 )；
2. Mechanical properties: the 28d compressive strength of the anti-abrasion concrete can reach 60MPa, and the 28d flexural strength can reach 13MPa. Adhesion to base concrete: the bonding strength of the anti-abrasion concrete and the base concrete is more than 2.5Mpa for 28 d;
3. the freezing resistance performance is as follows: the anti-freezing grade is F500, and the anti-abrasion concrete member has no strength and quality reduction and quality loss after being subjected to freeze-thaw cycles for 500 times;
4. construction performance: the construction is convenient, the consumption of cement is reduced by the interaction of various admixtures, the manufacturing cost is reduced, and the engineering investment is saved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limiting the present invention.
Example 1
The embodiment 1 provides an ultra-high performance abrasion-resistant concrete applied to alpine and high-altitude areas, wherein the raw materials of the concrete comprise the following components in percentage by weight: low heat silicate cement 290-330 kg/m 3 8.5-12.5 kg/m metakaolin 3 Pumice powder 25-35 kg/m 3 738-765 kg/m of basalt sand with the grain diameter of 2-3 mm 3 1180-1350 kg/m basalt aggregate with the grain diameter of 5-20 mm 3 1.2-3.6 kg/m basalt chopped fiber 3 KH560 modified beta-cyclodextrin 0.12-0.32 kg/m 3 0.05-0.15 kg/m of graphene oxide 3 Reduction of melamine2.58-3.65 kg/m of water agent 3 55-85 kg/m of water 3 。
The high-strength basalt sand, the aggregate and the cementing material react to provide an anti-abrasion and strength foundation for the ultra-high-performance anti-abrasion concrete.
The modified beta-cyclodextrin can improve the workability of the anti-abrasion concrete so as to improve the construction performance.
The basalt chopped fibers and the graphene oxide can improve the microstructure of concrete, the basalt chopped fibers play a role in bridging and overlapping in the concrete, the graphene oxide condensation nuclear effect can adjust the crystal structure of a cement-based material, improve the micro cracks of the concrete, reduce the permeability coefficient of the concrete, improve the compactness of the concrete, and greatly improve the durability and the crack resistance of the anti-abrasion concrete.
The melamine high-efficiency water reducing agent can obviously improve the working performance of concrete and has the characteristics of high water reducing rate, obvious early strength effect, low air entraining property, less environmental pollution in the production process and the like.
The ultra-high performance anti-abrasion concrete developed in the embodiment abandons the concept of traditional concrete air entraining, the air entraining agent is not doped in the formula, and the novel anti-abrasion concrete with high strength, high compactness, strong durability, low cracking property and strong anti-abrasion capability is formed by depending on the chemical reaction and the synergistic action among the components of the material.
The concrete is suitable for parts with high requirements on abrasion resistance, such as diversion tunnels, flood discharge tunnels, conservation staffs, stilling pools, plunge pools, overflow surfaces, spillways, sand washing gates and the like, can obviously improve the abrasion resistance and the freeze-thaw damage resistance of hydraulic engineering flood discharge buildings, and prolongs the service life of the hydraulic engineering buildings.
The concrete for the ultra-high performance anti-abrasion concrete applied to the alpine and high-altitude areas provided by the embodiment has the following specific preparation process:
firstly, preparing materials;
the raw materials are mixed as follows: low heat silicate cement 290-330 kg/m 3 Metakaolin 8.5-12.5 kg/m 3 Pumice powder 25-35 kg/m 3 738-765 kg/m of basalt sand with the grain diameter of 2-3 mm 3 1180-1350 kg/m basalt aggregate with the grain diameter of 5-20 mm 3 1.2-3.6 kg/m of basalt chopped fiber 3 KH560 modified beta-cyclodextrin 0.12-0.32 kg/m 3 0.05-0.15 kg/m of graphene oxide 3 2.58-3.65 kg/m of melamine water reducing agent 3 ；
Then fully stirring the mixture evenly for standby.
The second step: stirring and preparing the abrasion-resistant concrete;
adding 55-85 kg/m3 of water into the raw materials, stirring, adding half of the water, stirring for 2min, then adding the rest water, stirring fully, and stirring for 3min.
The third step: constructing concrete;
and (3) carrying out concrete construction on the anti-abrasion concrete prepared by stirring according to design requirements, and periodically adding water for maintenance to finish the preparation.
The ultrahigh-performance anti-abrasion concrete prepared by the scheme has good anti-abrasion performance through experimental verification, can resist the scouring of bed load with the grain size of 8-50 cm in high-cold high-altitude areas, and has good effect after two flood periods, and the repaired part is not obviously damaged; the 28d impact and abrasion resistance strength is more than or equal to 30 h/(g/cm) 2 )；
The mechanical property is good: the 28d compressive strength of the anti-impact wear concrete can reach 60MPa, the 28d flexural strength reaches 13MPa, and the concrete has the following bonding property with the base concrete: the bonding strength of the anti-abrasion concrete and the base concrete is more than 2.5Mpa for 28 d;
the antifreeze performance is good: the anti-freezing grade is F500, and the anti-abrasion concrete member is subjected to freeze-thaw cycles for 500 times without the reduction of strength and quality and the loss of quality;
the construction is convenient, the mutual action of a plurality of admixtures reduces the cement consumption, reduces the manufacturing cost and saves the engineering investment.
Example 2
The embodiment 2 is further optimized based on the embodiment 1, and provides a specific implementation manner.
The experimental comparison and the experimental results are as follows:
test 1 group: preparing materials according to the following components: low-heat silicate cement 305kg/m 3 Metakaolin 11.7kg/m 3 Pumice powder 25.5kg/m 3 744kg/m of basalt sand 3 5-20 mm basalt aggregate 1253kg/m 3 Basalt chopped strand 2.52 kg/m 3 KH560 modified beta-cyclodextrin 0.21kg/m 3 0.09kg/m of graphene oxide 3 2.76kg/m of melamine water reducing agent 3 58kg/m of water 3 。
Pouring the prepared materials into a stirring device, adding half of water for stirring, and then adding the rest water for fully stirring. And testing the compression resistance, the bending resistance, the freezing resistance, the ultimate tensile property and the abrasion resistance of the abrasion-resistant concrete test block.
Test 2 groups: preparing materials according to the following components: 60kg/m water 3 Cement 310kg/m 3 75kg/m of fly ash 3 PVA fiber 0.9kg/m 3 26kg/m of silicon powder 3 740kg/m of fine sand 3 1120kg/m of coarse aggregate 3 3.21kg/m of water reducing agent 3 0.028kg/m of air entraining agent 3 。
Pouring the prepared materials into a stirring device, adding half of water for stirring, and then adding the rest water for fully stirring. And testing the compression resistance, the bending resistance, the freezing resistance, the ultimate tensile property and the abrasion resistance of the abrasion-resistant concrete test block.
Wherein experiment 1 group is the grandma matching of this scheme, and experiment 2 group is through the conventional ratio of adding the air-entraining agent, and through the experiment, its concrete performance is to show such as following table:
the above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (7)
1. The ultra-high performance anti-abrasion concrete is characterized in that raw materials of the ultra-high performance anti-abrasion concrete comprise the following components in percentage by weight of each square of concrete: low heat silicate cement 290-330 kg/m 3 Metakaolin 8.5-12.5 kg/m 3 Pumice powder 25-35 kg/m 3 738-765 kg/m of basalt sand 3 1200-1350 kg/m basalt aggregate 3 1.2-3.6 kg/m of basalt chopped fiber 3 Beta-cyclodextrin 0.12-0.32 kg/m 3 0.05-0.15 kg/m of graphene oxide 3 2.58-3.65 kg/m of water reducing agent 3 And the balance water.
2. The ultra-high performance impact-resistant concrete according to claim 1, wherein the basalt aggregate has a particle size of 5 to 20mm.
3. The ultra-high performance impact-resistant concrete according to claim 1, wherein the particle size of the basalt sand is 2-3 mm.
4. The ultra-high performance impact-resistant concrete according to claim 1, wherein the beta-cyclodextrin is KH560 modified beta-cyclodextrin.
5. The ultra-high performance impact-resistant concrete according to claim 1, wherein the water-reducing agent is a melamine water-reducing agent.
6. The ultra-high performance impact-resistant concrete according to claim 1, wherein the amount of water is 55-85 kg/m 3 。
7. The ultra-high performance abrasion-resistant concrete according to claim 1, wherein the concrete is applied to alpine and high-altitude areas.
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Application publication date: 20221227 |