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Preparation method and application of concrete anti-cracking reinforcing agent

A concrete reinforcing agent and reinforcing agent technology, applied in the field of concrete admixtures, can solve the problems of high cement dosage, insufficient strength of high water-cement ratio, easy to generate a large number of wide cracks, poor crack resistance of concrete, etc. The effect of saving the amount of hydraulic setting and improving the strength of concrete

Active Publication Date: 2020-07-28
SHANXI KANGRUI BUILDING MATERIAL NEW TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, higher and higher requirements have been put forward for building materials, so as to increase the strength of concrete and reduce the weight of buildings has become an inevitable requirement. In many modern concrete projects, traditional concrete admixtures are not good enough due to the limitations of technical performance. To meet the needs of the project, although ready-mixed concrete has made great progress, the phenomenon of high cement consumption, high water-cement ratio, insufficient strength, and strong crushing is still not substantially changed. Therefore, the existing technology needs to be improved and improved. For medium-strength concrete, it can reduce the amount of cement while ensuring its workability, strength and durability. It has a wide application prospect, especially after the concrete is used, it is prone to cracking and affects performance. For ordinary The crack resistance of concrete is poor, it is easy to produce a large number of wide cracks, and the phenomenon of component deformation and insufficient strength is serious.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] S1: Add 245kg of allyl polyoxyethylene epoxy ether into a 125kg deionized water reaction container, then add 58kg of allyloxydimethoxysilane, heat to 80°C~85°C, and the heating time is 15 minutes , and stir fully at the same time, the stirring time is the same as the heating time; S2: After step S1 is completed, cool down to 50°C, add 45kg of sodium acrylate and 32kg of initiator dropwise into the reaction vessel, and stir for 35 minutes to make it evenly mixed, Mixture A is obtained; S3: 180kg of triethanolamine and 80kg of polyvinyl alcohol are added to a 35kg deionized water reaction container, and fully stirred for 25 minutes to obtain a mixture B; S4: The mixture A is maintained at 50°C to 55°C, Slowly pour into the mixture B while stirring, and fully stir for 25 minutes to obtain the concrete anti-cracking enhancer of the present invention.

[0056] The dosage of the concrete reinforcing agent provided by the invention accounts for 0.2% to 0.3% of the total mass o...

Embodiment 2

[0058] S1: Add 237kg of allyl polyoxyethylene epoxy ether into 123kg of deionized water reaction container, then add 57kg of allyloxydimethoxysilane, heat to 80℃~85℃, and the heating time is 15 minutes , and stir fully at the same time, the stirring time is the same as the heating time; S2: After step S1 is completed, cool down to 50°C, add 42kg of sodium acrylate and 29kg of initiator dropwise into the reaction vessel, and stir for 35 minutes to make it evenly mixed, Mixture A was obtained; S3: 178kg of triethanolamine and 77kg of polyvinyl alcohol were added to a 37kg deionized water reaction vessel, and fully stirred for 25 minutes to obtain mixture B; S4: Mixture A was maintained at 50°C to 55°C, Slowly pour into the mixture B while stirring, and fully stir for 25 minutes to obtain the concrete anti-cracking enhancer of the present invention.

[0059] The dosage of the concrete reinforcing agent provided by the invention accounts for 0.2% to 0.3% of the total mass of hydra...

Embodiment 3

[0061] S1: Add 235kg of allyl polyoxyethylene epoxy ether into 120kg of deionized water reaction container, then add 56kg of allyloxydimethoxysilane, heat to 80℃~85℃, and the heating time is 15 minutes , and stir fully at the same time, the stirring time is the same as the heating time; S2: After step S1 is completed, cool down to 50°C, add 40kg of sodium acrylate and 28kg of initiator dropwise into the reaction vessel, and stir for 35 minutes to make it evenly mixed, Mixture A was obtained; S3: 175kg of triethanolamine and 75kg of polyvinyl alcohol were added to a 35kg deionized water reaction vessel, and fully stirred for 25 minutes to obtain mixture B; S4: Mixture A was maintained at 50°C to 55°C, Slowly pour into the mixture B while stirring, and fully stir for 25 minutes to obtain the concrete anti-cracking enhancer of the present invention.

[0062] The dosage of the concrete reinforcing agent provided by the invention accounts for 0.2% to 0.3% of the total mass of hydra...

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PUM

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Abstract

The invention discloses a preparation method and application of a concrete anti-cracking reinforcing agent. The concrete anti-cracking reinforcing agent is composed of allyl polyoxyethylene epoxy ether, an initiator, sodium acrylate, allyloxydimethoxysilane, polyvinyl alcohol, triethanolamine and deionized water. By mixing with concrete according to a certain proportion for use, the dispersity ofthe hydrogel particles can be efficiently excited, the comprehensive performance of the concrete is improved, the strength and the crack resistance of the concrete can be improved, various functions such as the mechanical property of the concrete are comprehensively improved, the national harmful substance requirement standard is met, a production cost is reduced, the concrete anti-cracking reinforcing agent disclosed by the invention is non-toxic and harmless, has no corrosion hazard to steel bars and good adaptability to various hydrates and water reducing agents, the production process is simple, conditions are mild, control of feeding and conditions in the production process is easy, discharge of three wastes in the whole process is avoided, and the environmental protection, no pollution, cleanness and wide market application prospect are realized.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to the preparation and application of a concrete anti-cracking enhancer. Background technique [0002] In recent years, higher and higher requirements have been put forward for building materials, so as to increase the strength of concrete and reduce the weight of buildings has become an inevitable requirement. In many modern concrete projects, traditional concrete admixtures are not good enough due to the limitations of technical performance. To meet the needs of the project, although ready-mixed concrete has made great progress, the phenomenon of high cement consumption, high water-cement ratio, insufficient strength, and strong crushing is still not substantially changed. Therefore, the existing technology needs to be improved and improved. For medium-strength concrete, it can reduce the amount of cement while ensuring its workability, strength and durability. It has a wide application pro...

Claims

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Application Information

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IPC IPC(8): C04B24/42C04B28/04
CPCC04B40/0046C04B28/04C04B24/42C04B24/122C04B24/2623C04B2103/302C04B18/12C04B18/08C04B14/068
Inventor 郑宝霞
Owner SHANXI KANGRUI BUILDING MATERIAL NEW TECH CO LTD