CN118993613A - High slump retaining water reducer for solid waste-based low-carbon cement concrete and application thereof - Google Patents
High slump retaining water reducer for solid waste-based low-carbon cement concrete and application thereof Download PDFInfo
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- CN118993613A CN118993613A CN202411490253.1A CN202411490253A CN118993613A CN 118993613 A CN118993613 A CN 118993613A CN 202411490253 A CN202411490253 A CN 202411490253A CN 118993613 A CN118993613 A CN 118993613A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 239000002910 solid waste Substances 0.000 title claims abstract description 67
- 239000004568 cement Substances 0.000 title claims abstract description 65
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 62
- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 53
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 44
- 238000003756 stirring Methods 0.000 claims abstract description 20
- 239000008030 superplasticizer Substances 0.000 claims abstract description 18
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims description 25
- 239000000203 mixture Substances 0.000 claims description 18
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 16
- 229910052708 sodium Inorganic materials 0.000 claims description 16
- 239000011734 sodium Substances 0.000 claims description 16
- 239000004593 Epoxy Substances 0.000 claims description 9
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims description 9
- 239000004115 Sodium Silicate Substances 0.000 claims description 9
- 229960000892 attapulgite Drugs 0.000 claims description 9
- 229910052625 palygorskite Inorganic materials 0.000 claims description 9
- -1 pyridinium quaternary ammonium salt Chemical class 0.000 claims description 9
- FZHAPNGMFPVSLP-UHFFFAOYSA-N silanamine Chemical compound [SiH3]N FZHAPNGMFPVSLP-UHFFFAOYSA-N 0.000 claims description 9
- 229910000077 silane Inorganic materials 0.000 claims description 9
- 235000019795 sodium metasilicate Nutrition 0.000 claims description 9
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 7
- 239000002202 Polyethylene glycol Substances 0.000 claims description 5
- 229920001223 polyethylene glycol Polymers 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 5
- AEQDJSLRWYMAQI-UHFFFAOYSA-N 2,3,9,10-tetramethoxy-6,8,13,13a-tetrahydro-5H-isoquinolino[2,1-b]isoquinoline Chemical compound C1CN2CC(C(=C(OC)C=C3)OC)=C3CC2C2=C1C=C(OC)C(OC)=C2 AEQDJSLRWYMAQI-UHFFFAOYSA-N 0.000 claims description 3
- 235000013162 Cocos nucifera Nutrition 0.000 claims description 3
- 244000060011 Cocos nucifera Species 0.000 claims description 3
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004327 boric acid Substances 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 239000000176 sodium gluconate Substances 0.000 claims description 3
- 229940005574 sodium gluconate Drugs 0.000 claims description 3
- 235000012207 sodium gluconate Nutrition 0.000 claims description 3
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 3
- 229960001763 zinc sulfate Drugs 0.000 claims description 3
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 3
- ACFOQSFTZHRLHN-UHFFFAOYSA-N 2-phosphanylbutane-1,1,1-tricarboxylic acid Chemical compound PC(C(C(=O)O)(C(=O)O)C(=O)O)CC ACFOQSFTZHRLHN-UHFFFAOYSA-N 0.000 claims description 2
- 206010016807 Fluid retention Diseases 0.000 claims 10
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims 1
- 239000004711 α-olefin Substances 0.000 claims 1
- 239000002245 particle Substances 0.000 abstract description 13
- 238000010521 absorption reaction Methods 0.000 abstract description 9
- 238000001179 sorption measurement Methods 0.000 abstract description 5
- 201000010099 disease Diseases 0.000 abstract description 3
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 abstract description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000002002 slurry Substances 0.000 description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 238000006243 chemical reaction Methods 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 230000002940 repellent Effects 0.000 description 8
- 239000005871 repellent Substances 0.000 description 8
- 229920005646 polycarboxylate Polymers 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000004902 Softening Agent Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000740 bleeding effect Effects 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229910052938 sodium sulfate Inorganic materials 0.000 description 2
- 235000011152 sodium sulphate Nutrition 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 239000004890 Hydrophobing Agent Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- OKWFWLQRTYKJRW-UHFFFAOYSA-N butane-1,1,1-tricarboxylic acid;phosphane Chemical compound P.CCCC(C(O)=O)(C(O)=O)C(O)=O OKWFWLQRTYKJRW-UHFFFAOYSA-N 0.000 description 1
- 238000003763 carbonization Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000003093 cationic surfactant Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 238000009439 industrial construction Methods 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 description 1
- JUJWROOIHBZHMG-UHFFFAOYSA-N pyridine Substances C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000003245 working effect Effects 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/30—Water reducers, plasticisers, air-entrainers, flow improvers
- C04B2103/32—Superplasticisers
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
本发明公开了一种固废基低碳水泥混凝土高保坍减水剂及其应用，以重量份数计，所述高保坍减水剂是将20‑35份高性能超塑化剂、25‑50份超保坍剂、10‑15份疏水剂、2‑6份提桨剂、0‑1份柔软剂、110‑140份水，依次加入搅拌反应釜，充分搅拌均匀所得。本发明以提高固废基低碳水泥混凝土的和易性、工作性等性能为出发点，通过分析病害产生核心关键点为混凝土颗粒粒径小、比表面积大，存在多孔、强吸水、高吸附等问题，设计出了一种可改善固废基低碳水泥混凝土上述问题的高保坍减水剂。该高保坍减水剂原材料易得、配方合理、易于加工，可实现固废基低碳水泥在混凝土中的资源化利用。The invention discloses a high-slump-retaining water-reducing agent for solid waste-based low-carbon cement concrete and its application. The high-slump-retaining water-reducing agent is obtained by adding 20-35 parts of high-performance superplasticizer, 25-50 parts of super-slump-retaining agent, 10-15 parts of hydrophobic agent, 2-6 parts of slurry-lifting agent, 0-1 part of softener, and 110-140 parts of water to a stirred reactor in sequence and stirring evenly. The present invention takes improving the workability and workability of solid waste-based low-carbon cement concrete as a starting point, analyzes the core key points of the disease generation, such as small concrete particle size, large specific surface area, porous, strong water absorption, high adsorption, etc., and designs a high-slump-retaining water-reducing agent that can improve the above-mentioned problems of solid waste-based low-carbon cement concrete. The high-slump-retaining water-reducing agent has easy-to-obtain raw materials, reasonable formula, and easy processing, and can realize the resource utilization of solid waste-based low-carbon cement in concrete.
Description
Technical Field
The invention relates to the technical field of concrete additives, in particular to a high slump-retaining water reducer for solid waste-based low-carbon cement concrete.
Background
In the process of the rapid development of industrial and infrastructure construction, a large amount of solid wastes such as fly ash of coal-fired power plants, desulfurized gypsum and slag, steel slag, tailing slag, stone dust collection ash of steel plants, etc. are generated, and these solid wastes have been extensively studied and applied in cement and concrete products. Meanwhile, the solid waste-based cementing material after mixing, grinding and excitation also generates solid waste-based low-carbon cement, and has great influence on the working performance of the newly-mixed concrete. Firstly, the solid waste base low-carbon cement has small particle size and large specific surface area (generally more than or equal to 600m 2/kg), has the characteristics of porosity, strong water absorption and high adsorption, and causes the problems of large slump loss, poor workability, poor adaptability to water reducing agents, low strength and the like in concrete application. Although the polycarboxylate water reducer exhibits excellent properties of high water reduction rate and small slump loss in ordinary concrete, since the ordinary polycarboxylate water reducer cannot effectively fill and close excessive open pores of the solid waste-based low-carbon cement, form a hydrophobic film or the like on the surface of powder particles, and further reduce the absorption of water by the solid waste-based low-carbon cement, the absorption of the water reducer active ingredient causes difficulty in exerting excellent properties of ordinary polycarboxylate water reduction in the solid waste-based low-carbon cement and the solid waste-based low-carbon cement concrete. Therefore, the functional requirements of the solid waste-based low-carbon cement and the solid waste-based low-carbon cement concrete on the water reducer are further improved, and as a result, the use amount of the water reducer is increased, and the loss requirement for controlling the slump of the concrete is improved. And secondly, under the same concrete mixing proportion condition, the water-cement ratio required by the solid waste base low-carbon cement and the solid waste base low-carbon cement concrete reaches the same working strength is increased, so that the concrete is extremely easy to isolate and bleed after pouring, the problems of sedimentation cracking and strength reduction of the hardened concrete occur, harmful mediums such as water, carbon dioxide and chloride ions are easy to infiltrate and infiltrate, the concrete is greatly shrunk, and the carbonization resistance, the impermeability, the freezing resistance, the salinization resistance and the seawater corrosion resistance are poor, so that the overall durability of the concrete is damaged. In addition, the larger the mixing amount of the solid waste base low-carbon cement in the concrete or the mortar is, the more serious the above-mentioned diseases are.
The Chinese patent CN 106045372B discloses a special polycarboxylate superplasticizer for concrete mixed with basalt stone powder and a preparation method thereof, the method has simple operation process, the prepared special polycarboxylate superplasticizer effectively solves the problem that basalt powder is not suitable for being used as a concrete admixture due to strong water absorption and low activity. However, the method for solving the problems of large slump loss, poor workability, poor adaptability to water reducing agents, low strength and the like of the solid waste base low-carbon cement in concrete application is not provided, and the popularization and application of the solid waste base low-carbon cement are greatly limited.
Disclosure of Invention
The invention aims to provide a high slump retaining water reducer for solid waste base low-carbon cement concrete, which solves the problem that the existing polycarboxylate water reducer cannot be compatible with the solid waste base low-carbon cement concrete in a harmonious way, realizes the high performance of the solid waste base low-carbon cement concrete, and effectively promotes the high-value utilization of industrial solid waste resources.
The invention further aims to provide an application method of the high slump-retaining water reducer in preparation of solid waste-based low-carbon cement concrete.
In order to achieve the purpose, the invention adopts the following technical scheme:
The invention provides a high slump-retaining water reducer for solid waste-based low-carbon cement concrete, which is prepared by sequentially adding 20-35 parts of high-performance superplasticizer, 25-50 parts of super slump-retaining agent, 10-15 parts of water repellent, 2-6 parts of pulp lifting agent, 0-1 part of softener and 110-140 parts of water into a stirring reaction kettle in parts by weight, and fully and uniformly stirring.
As a further preferable mode of the technical scheme of the invention, the high-performance superplasticizer is the Sichuan 530P high-performance superplasticizer.
Further, the super slump retaining agent is prepared by dissolving 15 parts of sodium gluconate, 10 parts of boric acid, 15 parts of phosphinobutanetricarboxylic acid and 20 parts of zinc sulfate in 40 parts of deionized water.
Further, the hydrophobizing agent is obtained by uniformly mixing 55-85% by mass of amino silane, 5-15% by mass of epoxy silane, 5-15% by mass of sodium metasilicate and 5-10% by mass of oligomeric silsesquioxane.
Further, the pulp lifter is one or a mixture of more of attapulgite, sodium cocoyl sulfate or sodium a-alkenyl sulfonate.
Further, the softening agent is one or a mixture of more of pyridine quaternary ammonium salt, ester quaternary ammonium salt or polyethylene glycol 2000. Preferably a mixture of pyridinium quaternary ammonium salt, esterquat and polyethylene glycol 2000 in a mass ratio of 1:1:2.
Further, the stirring time in the preparation of the high slump retaining water reducing agent is 15-30min.
When the high slump-retaining water reducer is used, the high slump-retaining water reducer is doped into concrete, and the cementing material is solid waste base low-carbon cement, and the doping amount is 0.8-0.9wt%.
By adopting the technical scheme, the beneficial effects obtained by the invention are as follows:
1. The invention takes the performances of improving the workability, working performance and the like of solid waste-based low-carbon cement concrete as starting points, and the key points of disease generation through analysis are that the concrete particles are small in particle size and large in specific surface area, and the problems of porosity, strong water absorption, high adsorption and the like exist. The raw materials are easy to obtain, the formula is reasonable, the processing is easy, and the resource utilization of the solid waste base low-carbon cement in the concrete can be realized.
2. The hydrophobic agent is an organic silicon compound, and under the action of carbon dioxide, water and the like, a layer of insoluble waterproof high molecular compound with a plurality of molecular thicknesses can be generated on the surface of the solid waste base low-carbon cement powder particles, so that a netlike organic silicon resin film is formed, and the resin film can seal partial openings of the powder particles and improve the void structure of the powder particles. Meanwhile, the hydrophobing agent has a stronger hydrophobic function, can further improve the void tortuosity of solid waste-based low-carbon cement powder particles, and further improve the pore structure of concrete, thereby achieving the purposes of reducing water absorption and adsorption, improving the pore structure of mortar, concrete and the like, and further improving the compactness of a casting body.
3. The cocoanut sodium sulfate and the sodium a-alkenyl sulfonate in the slurry agent are cationic surfactants, firstly, the cocoanut sodium sulfate and the sodium a-alkenyl sulfonate can be selectively and preferentially adsorbed on the surfaces of solid waste base low-carbon cement particles, can better inhibit the water absorption of the solid waste base low-carbon cement, and can inhibit the adsorption of a polycarboxylate water reducer, secondly, a large number of tiny closed bubbles can be formed in a concrete mixture, and the tiny bubbles are similar to balls, so that the adverse effect of poor fluidity of the concrete slurry caused by the increase of friction resistance among rubber particles due to partial non-spherical solid waste powder particles is reduced, the fluidity of the concrete mixture is increased, and the defects of strong water absorption, easiness in bleeding and the like of the solid waste base low-carbon cement are overcome; meanwhile, the attapulgite in the slurry has good water retention and bleeding resistance, can suspend and stabilize concrete slurry, prevent the concrete slurry from sinking, improve the coating property of the concrete slurry on aggregate, and improve the workability of fresh concrete.
4. The invention introduces the softening agent, can reduce the interaction of adhesive force, friction force and the like among slurry particles, and improves the fluidity and stability of the slurry.
Detailed Description
The composition, the use method and the effect of the high slump retaining water reducer of the invention are described in detail below with reference to specific examples.
In the following examples of the present invention, the high performance superplasticizer was 530P high performance superplasticizer, purchased from chinese division of the sieka company, swiss; the super slump retaining agent is prepared by dissolving 15 parts of sodium gluconate, 10 parts of boric acid, 15 parts of phosphine butane tricarboxylic acid and 20 parts of zinc sulfate in 40 parts of deionized water according to parts by weight. The softening agent is a mixture of pyridinium quaternary ammonium salt, ester quaternary ammonium salt and polyethylene glycol 2000 in a mass ratio of 1:1:2.
Example 1
The high slump retaining water reducer for the solid waste base low carbon cement concrete is prepared by sequentially adding 20 parts by weight of high-performance superplasticizer, 50 parts by weight of super slump retaining agent, 10 parts by weight of water repellent, 3 parts by weight of slurry stripping agent, 0.5 part by weight of softener and 120 parts by weight of water into a stirring reaction kettle, stirring for 25min, and fully and uniformly mixing.
The hydrophobizing agent is prepared by uniformly mixing 60% of amino silane, 15% of epoxy silane, 15% of sodium metasilicate and 10% of oligomeric silsesquioxane by mass percent.
The pulp extracting agent is a mixture of attapulgite and sodium cocoyl sulfate in a mass ratio of 1:1.
Example 2
The high slump retaining water reducer for the solid waste base low carbon cement concrete is prepared by sequentially adding 27 parts by weight of high-performance superplasticizer, 45 parts by weight of super slump retaining agent, 10 parts by weight of water repellent, 3 parts by weight of slurry stripping agent, 0.3 part by weight of softener and 130 parts by weight of water into a stirring reaction kettle, stirring for 20min, and fully and uniformly mixing.
The hydrophobizing agent is obtained by uniformly mixing 65% by mass of amino silane, 15% by mass of epoxy silane, 10% by mass of sodium metasilicate and 10% by mass of oligomeric silsesquioxane.
The pulp lifting agent is a mixture of attapulgite and sodium a-alkenyl sulfonate in a mass ratio of 2:3.
Example 3
The high slump retaining water reducer for the solid waste base low carbon cement concrete is prepared by sequentially adding 22 parts by weight of high-performance superplasticizer, 35 parts by weight of slump retaining agent, 15 parts by weight of water repellent, 5 parts by weight of slurry stripping agent, 0.4 part by weight of softener and 120 parts by weight of water into a stirring reaction kettle, stirring for 30min, and fully and uniformly mixing.
The hydrophobizing agent is prepared by uniformly mixing 75% of amino silane, 5% of epoxy silane, 15% of sodium metasilicate and 5% of oligomeric silsesquioxane by mass percent.
The pulp lifting agent is a mixture of attapulgite and sodium a-alkenyl sulfonate in a mass ratio of 1:1.
Example 4
The high slump retaining water reducer for the solid waste base low carbon cement concrete is prepared by sequentially adding 23 parts by weight of high-performance superplasticizer, 40 parts by weight of super slump retaining agent, 14 parts by weight of water repellent, 6 parts by weight of slurry stripping agent, 0.6 part by weight of softener and 140 parts by weight of water into a stirring reaction kettle, stirring for 25min, and fully and uniformly mixing.
The hydrophobizing agent is prepared by uniformly mixing 85% of amino silane, 5% of epoxy silane, 5% of sodium metasilicate and 5% of oligomeric silsesquioxane by mass percent.
The pulp-extracting agent is a mixture of attapulgite, sodium a-alkenyl sulfonate and sodium cocoyl sulfate in a mass ratio of 2:1:1.
Example 5
The high slump retaining water reducer for the solid waste base low carbon cement concrete is prepared by sequentially adding 25 parts by weight of high-performance superplasticizer, 35 parts by weight of super slump retaining agent, 13 parts by weight of water repellent, 6 parts by weight of slurry stripping agent, 1 part by weight of softening agent and 110 parts by weight of water into a stirring reaction kettle, stirring for 30min, and fully and uniformly mixing.
The hydrophobizing agent is prepared by uniformly mixing 80% of amino silane, 10% of epoxy silane, 5% of sodium metasilicate and 5% of oligomeric silsesquioxane by mass percent.
The pulp extracting agent is a mixture of attapulgite and sodium cocoyl sulfate in a mass ratio of 2:1.
Example 6
The high slump retaining water reducer for the solid waste base low carbon cement concrete is prepared by sequentially adding 30 parts by weight of high-performance superplasticizer, 30 parts by weight of slump retaining agent, 15 parts by weight of water repellent, 4 parts by weight of slurry stripping agent, 0.8 part by weight of softener and 140 parts by weight of water into a stirring reaction kettle, stirring for 30min, and fully and uniformly mixing.
The hydrophobizing agent is prepared by uniformly mixing 72% of amino silane, 10% of epoxy silane, 10% of sodium metasilicate and 8% of oligomeric silsesquioxane by mass percent.
The pulp-extracting agent is a mixture of attapulgite, sodium a-alkenyl sulfonate and sodium cocoyl sulfate in a mass ratio of 1:2:1.
Example 7
The high slump retaining water reducer for the solid waste base low carbon cement concrete is prepared by sequentially adding 35 parts by weight of high-performance superplasticizer, 25 parts by weight of slump retaining agent, 13 parts by weight of water repellent, 5 parts by weight of slurry extracting agent and 130 parts by weight of water into a stirring reaction kettle, stirring for 30min, and fully and uniformly mixing.
The hydrophobizing agent is prepared by uniformly mixing 63% of amino silane, 15% of epoxy silane, 12% of sodium metasilicate and 10% of oligomeric silsesquioxane by mass percent.
The pulp lifting agent is a mixture of sodium a-alkenyl sulfonate and sodium cocoyl sulfate in a mass ratio of 1:2.
The polycarboxylic acid water reducer with the water reduction rate of 28% produced by Jiangsu Su Bote new material Co-Ltd which is currently marketed is used as a comparison sample water reducer, and under the condition that other components of the solid waste base low-carbon cement concrete high slump-retaining water reducer obtained in the embodiment 1-7 are the same, C30 common solid waste base low-carbon cement concrete is respectively prepared, and a concrete performance test is carried out. The proportions of the C30 common solid waste base low-carbon cement concrete are shown in table 1. In the test, the high slump retaining water reducing agent of the solid waste base low carbon cement concrete has the mixing amount of 0.8-0.9wt% of cementing material (Table 2), the cementing material is 42.5-grade solid waste base low carbon cement produced by Lanzhou cast stone, and the solid waste base low carbon cement is prepared by adopting a vertical mill and a ball mill to jointly grind, and has the standard consistency of 33.5 percent and the specific surface area of 650m 2/kg. In table 1, 1.70% is the optimal blending amount of the water reducer for the comparison sample under the condition that the slump of the newly mixed concrete is up to 200mm in the preparation of the C30 common solid waste base low-carbon cement concrete under the condition that the water reducer for the comparison sample is fixed in water-cement ratio and sand ratio, and the workability (characterized by the expansion degree, the expansion degree is large to illustrate the workability and has good fluidity and working property) is good. The sand is middle sand meeting the requirements of a zone II in GB/T14684, the fineness modulus is 2.98, and the mud content is 0.95; the crushed stone is in accordance with GB/T14685 and is prepared by three stages, wherein the granularity of 5-10mm is 20%, the granularity of 10-20mm is 50%, the granularity of 20-31.5mm is 30%, and the corresponding concrete performance test results are shown in Table 2.
As can be seen from the results in tables 1-2, in the same mixing ratio, although the slump of the prepared C30 common solid waste-based low-carbon cement concrete with the slump of the prepared concrete being 200mm and the expansion of the prepared concrete being 465mm can be prepared by adopting the comparative sample water reducer with the mixing amount of 1.70%, the slump retaining capacity of the freshly mixed concrete is poor, so that the working performance of the freshly mixed concrete is poor, and the popularization and the application of the solid waste-based low-carbon cement concrete are not facilitated. The solid waste-based low-carbon cement concrete high-slump-retaining water reducer of the embodiments 1-7 of the invention has low mixing amount of the water reducer, the slump and the expansion degree of the freshly mixed concrete are superior to those of the concrete prepared by the comparative sample on the premise of meeting the requirements, meanwhile, the slump loss of the concrete is small over time, the slump-retaining effect is good, the fluidity of the concrete can be kept for a long time, the construction is facilitated, the concrete strength of different ages is improved to some extent, the index range of the working performance of the concrete is reached, and the comprehensive performance of the concrete prepared by mixing the water reducer of the embodiment 7 is better. Therefore, the invention creates favorable conditions for the wide popularization and use of the solid waste base low-carbon cement concrete.
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