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Shrinkage-reducing cracking-resistant reinforcing agent, C50 machine-made sand concrete and preparation method

A technology for machine-made sand and concrete, applied in the field of building materials, can solve problems such as bleeding, delamination, poor concrete fluidity, etc., and achieve the effect of saving labor and increasing shrinkage.

Inactive Publication Date: 2019-04-19
重庆南两高速公路建设有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the actual use of polycarboxylate superplasticizer, it was found that compared with natural sand, it showed higher sensitivity in machine-made sand concrete. The type of polycarboxylate superplasticizer, the amount of superplasticizer, and the mechanism Factors such as the content of stone powder in the sand will cause poor fluidity, bleeding, and delamination of the concrete, which will adversely affect the pumping performance of the concrete.

Method used

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  • Shrinkage-reducing cracking-resistant reinforcing agent, C50 machine-made sand concrete and preparation method
  • Shrinkage-reducing cracking-resistant reinforcing agent, C50 machine-made sand concrete and preparation method
  • Shrinkage-reducing cracking-resistant reinforcing agent, C50 machine-made sand concrete and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Take the preparation of 1000kg shrinkage-reducing and anti-cracking reinforcing agent as an example, wherein the mother liquor includes raw materials of the following weight:

[0028] Methoxypolyethylene glycol 30kg, methacrylic acid 45kg, glacial acetic acid 45kg, tetrabutyl titanate 15kg, absolute ethanol 40kg, enhancer 30kg, HEA 40kg, compound molecular weight regulator mercaptopropionic acid 8kg, allyl polyoxygen Vinyl ether 400kg, rosin 20kg, alkylbenzene sulfonate 50kg, triethanolamine 10kg, silicone 8kg, VC 0.7kg, water 258.3kg;

[0029] The compounding materials include 0.5 kg of methyl cellulose, 20 kg of sodium gluconate, and 10 kg of sodium thiosulfate; 400 kg of the above-mentioned mother liquor is mixed with all the compounding materials, and 569.5 kg of water is added to obtain 1000 kg of shrinkage-reducing antibiotics after mixing. crack enhancer.

Embodiment 2

[0031] Take the preparation of 1000kg shrinkage-reducing and anti-cracking reinforcing agent as an example, wherein the mother liquor includes raw materials of the following weight:

[0032]Methoxypolyethylene glycol 30kg, methacrylic acid 45kg, glacial acetic acid 40kg, tetrabutyl titanate 15kg, absolute ethanol 25kg, enhancer 30kg, HEA 25kg, compound molecular weight regulator mercaptopropionic acid 6kg, allyl polyoxygen Vinyl ether 380kg, rosin 15kg, alkylbenzene sulfonate 50kg, triethanolamine 15kg, silicone 6kg, VC 0.6kg, water 317.4kg;

[0033] Described composite material comprises sodium citrate 10kg, sodium gluconate 10kg, aluminum sulfate 15kg;

[0034] Mix 320kg of the above-mentioned mother liquor with all the compound materials, add 645kg of water, and mix to obtain 1000kg of shrinkage-reducing and anti-cracking reinforcing agent.

Embodiment 3

[0036] Take the preparation of 1000kg as an example to reduce shrinkage and anti-crack strengthening agent, wherein the mother liquor includes raw materials with the following weight:

[0037] Methoxypolyethylene glycol 20kg, methacrylic acid 40kg, glacial acetic acid 30kg, tetrabutyl titanate 10kg, absolute ethanol 20kg, enhancer 20kg, HEA 20kg, composite molecular weight regulator mercaptopropionic acid 5kg, allyl polyoxygen Vinyl ether 300kg, rosin 10kg, alkylbenzene sulfonate 40kg, triethanolamine 10kg, silicone 5kg, VC 0.5kg, water 469.5kg;

[0038] Described composite material comprises sodium citrate 10kg, sodium gluconate 10kg;

[0039] Mix 280kg of the above-mentioned mother liquor with all the compound materials, add 700kg of water, and mix to obtain 1000kg of shrinkage-reducing and anti-cracking reinforcing agent.

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Abstract

The invention discloses a shrinkage-reducing cracking-resistant reinforcing agent, C50 machine-made sand concrete and a preparation method. The shrinkage-reducing cracking-resistant reinforcing agentcomprises a mother liquor and a compounding material; the mother liquor is prepared from 2-4% of methoxy polyethylene glycol, 4-8% of methacrylic acid, 3-5% of glacial acetic acid, 1-2% of tetrabutyltitanate, 2-5% of anhydrous ethanol, 2-4% of a reinforcing agent, 2-5% of HEA, 0.5-1.0% of a composite molecular weight regulator thiohydracrylic acid, 30-50% of allyl polyoxyethylene ether, 1-2% of rosin, 4-7% of alkylbenzene sulfonate, 1-2% of triethanolamine, 0.5-1.0% of silicone, 0.05-0.08% of VC and the balance water; the compounding materials are selected from one or more of magnesium powder, triethanolamine, methylcellulose, sodium citrate, sodium gluconate, sodium thiosulfate, iron sulfate and aluminum sulfate. The workability, fluidity and shrinkage resistance of the concrete are effectively improved.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a shrinkage-reducing anti-crack reinforcing agent, C50 machine-made sand concrete and a preparation method. Background technique [0002] Due to its high strength and high durability, high-performance concrete can reduce the size of the structure, reduce the weight of the structure, save land, reduce energy consumption, reduce structural maintenance costs, and reduce reconstruction costs. Its technology development has become a key research and development in the construction industry. One of the concrete technologies of concern. At the same time, with the development trend of high-rise and super-high-rise, long-span, underground and harsh environments in architectural design, high-strength and ultra-high-strength high-performance concrete has a prominent role in large-scale projects such as super high-rise buildings, cross-sea bridges, and offshore oil production plat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B28/04C04B111/34
CPCC04B28/04C04B40/0039C04B2111/343C04B24/32C04B24/2641C04B24/04C04B24/045C04B24/02C04B2103/0068C04B24/16C04B24/34C04B24/20C04B24/122C04B24/42C04B22/002C04B24/383C04B24/06C04B22/148C04B18/08C04B18/141C04B14/048C04B14/02C04B14/28
Inventor 冯旭张廷刚霍剑雄陈栋刘仁凤
Owner 重庆南两高速公路建设有限公司
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