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A composite concrete viscosity-reducing material and its application

A concrete and composite technology, applied in the field of building materials, can solve the problem of high viscosity of concrete, and achieve the effects of good dispersion, good adaptability and wide application range

Active Publication Date: 2022-03-01
CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The embodiment of this application provides a composite concrete viscosity-reducing material and its application to solve the problem of high viscosity of concrete in related technologies

Method used

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  • A composite concrete viscosity-reducing material and its application
  • A composite concrete viscosity-reducing material and its application
  • A composite concrete viscosity-reducing material and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of a composite concrete viscosity-reducing material provided in this embodiment comprises the following steps:

[0028] (1) Preparation of hydrophilic monomers:

[0029] Add 100g of methacrylic acid into the three-necked flask, add NaOH aqueous solution (10wt%) and N,N-dimethyl-1,3-propanediamine molar ratio of 0.6:1 and N,N-dimethyl- 1,3-propanediamine, then add KOH equivalent to 0.35% of the total weight of methacrylic acid, NaOH aqueous solution (10wt%) and N,N-dimethyl-1,3-propanediamine as a catalyst, under nitrogen protection , start electric stirring, and react at 85°C for 4 hours. After the reaction is completed, Intermediate C is obtained; Intermediate C is washed with water, and then the washed Intermediate C is added to a three-necked flask, and 300g of ethanol is added, according to Intermediate C: 3- Sodium chloro-2-hydroxy-propylsulfonate:sodium chloroacetate is 0.4:1:1.9 molar ratio, add 3-chloro-2-hydroxy-propylsulfonate and sodiu...

Embodiment 2

[0044] The preparation method of a composite concrete viscosity-reducing material provided in this embodiment comprises the following steps:

[0045] (1) Preparation of hydrophilic monomers:

[0046] Add 100g of methacrylic acid into the three-necked flask, and add NaOH aqueous solution (10wt%) and N,N-dimethyl-1,3-propanediamine according to the molar ratio of NaOH and N,N-dimethyl-1,3-propylenediamine of 1.3:1. 1,3-propanediamine, then add sodium methoxide equivalent to 0.8% of the total weight of methacrylic acid, NaOH aqueous solution (10wt%) and N,N-dimethyl-1,3-propanediamine as a catalyst, under nitrogen Under protection, start electric stirring, and react at 85°C for 4 hours. After the reaction is completed, wash the product with water to obtain Intermediate C; then add the washed Intermediate C to a three-necked flask, add 300g of ethanol, and follow Intermediate C: 3-chloro -2-Hydroxy-propylsulfonate sodium:sodium chloroacetate=0.65:1:2.2 molar ratio, add 3-chloro-2...

Embodiment 3

[0061] The preparation method of a composite concrete viscosity-reducing material provided in this embodiment comprises the following steps:

[0062] (1) Preparation of hydrophilic monomers:

[0063] Add 100g of methacrylic acid into the three-necked flask, and add NaOH aqueous solution (10wt%) and N,N-dimethyl-1,3-propanediamine according to the molar ratio of NaOH and N,N-dimethyl-1,3-propylenediamine of 0.69:1. 1,3-propanediamine, then add KOH equivalent to 1.2% of the total weight of methacrylic acid, NaOH aqueous solution (10wt%) and N,N-dimethyl-1,3-propanediamine as a catalyst, under nitrogen protection , start the electric stirring, and react at 85°C for 4 hours. After the reaction is completed, Intermediate C is obtained; Intermediate C is washed with water, and then the washed Intermediate C is added to a three-necked flask, and 300g of ethanol is added, according to Intermediate C: 3- Sodium chloro-2-hydroxy-propylsulfonate:sodium chloroacetate=0.5:1:2.2 molar rati...

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Abstract

This application relates to a composite concrete viscosity-reducing material and its application. The composite concrete viscosity-reducing material includes component A and component B with a weight ratio of (3.5-8.5):1; wherein: component A is an inorganic mineral The admixture is modified by hydrophilic monomers and anionic surfactants; component B includes a weight ratio of (0.001~0.003):(0.001~0.005):(0.2~1.6):(0.1~0.4): (0.1-0.6) polysiloxane resin, sodium dodecylbenzenesulfonate, sodium phosphate, microfoaming agent and foam stabilizer. In this application, the surface modification of recycled fly ash microbeads and stone powder and other industrial wastes is carried out, and then compounded with organic viscosity-reducing components, which can improve the fluidity between the slurry and the aggregate, and increase the thickness of the water film between the components , increase the dispersion degree of cementitious components, enhance the workability and homogeneity of concrete; the composite concrete viscosity-reducing material is solid powder, which can be mixed evenly with cementitious materials, has a wide range of applications, and can effectively improve the slurry stability and reduce the viscosity of concrete.

Description

technical field [0001] The application relates to the field of building materials, in particular to a composite concrete viscosity-reducing material and its application. Background technique [0002] With the development of society and the continuous innovation of technical means, the structure of buildings is gradually developing in the direction of large-scale and high-rise buildings. During the construction of such buildings, due to the requirement of ultra-high strength, they are often used in the mixing process by using high-strength Improve the strength of building concrete by using more cement, increasing the amount of cement, increasing the content of gel material, and reducing the water-cement ratio. However, this type of operation will greatly increase the viscosity of concrete, which will cause problems such as uneven mixing and rapid loss during concrete mixing. In addition, high-viscosity concrete cannot guarantee the fluidity and slump of concrete. [0003] I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42C04B28/00C04B20/02C04B18/08C04B18/04C04B103/44
CPCC04B40/0039C04B20/023C04B28/00C04B2103/44C04B18/082C04B18/0427C04B24/42C04B24/20C04B22/16C04B24/166C04B2103/48C04B18/141C04B18/146C04B18/08Y02W30/91
Inventor 包嘉诚陈露一郑丽黄有强许婷李信
Owner CHINA RAILWAY MAJOR BRIDGE ENG GRP CO LTD
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