Composite concrete viscosity reduction material and application thereof

A concrete and composite technology, applied in the field of building materials, can solve the problem of high concrete viscosity, achieve the effects of good dispersibility, increase the degree of dispersion and easy storage

Active Publication Date: 2020-08-25
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 the present 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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  • Composite concrete viscosity reduction material and application thereof
  • Composite concrete viscosity reduction material and application thereof
  • Composite concrete viscosity reduction material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A kind of compound type concrete viscosity reducing material that present embodiment provides, its preparation method comprises the 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 ...

Embodiment 2

[0045] A kind of compound type concrete viscosity reducing material that present embodiment provides, its preparation method comprises the steps:

[0046] (1) Preparation of hydrophilic monomers:

[0047] 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-chlo...

Embodiment 3

[0062] A kind of compound type concrete viscosity reducing material that present embodiment provides, its preparation method comprises the steps:

[0063] (1) Preparation of hydrophilic monomers:

[0064] 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 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 rat...

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Abstract

The invention relates to a composite concrete viscosity reduction material and application thereof. The composite concrete viscosity reduction material comprises a component A and a component B in a weight ratio of (3.5-8.5): 1, wherein the component A is formed by modifying an inorganic mineral admixture with a hydrophilic monomer and an anionic surfactant; the component B is prepared from polysiloxane resin, sodium dodecyl benzene sulfonate, sodium phosphate, a micro-foaming agent and a foam stabilizer according to the weight ratio of (0.001 to 0.003) to (0.001 to 0.005) to (0.2 to 1.6) to (0.1 to 0.4) to (0.1 to 0.6). The recycled industrial wastes such as fly ash microspheres and stone powder are subjected to surface modification and then compounded with the organic viscosity reductioncomponent so that the fluidity between slurry and aggregate can be improved, the thickness of a water film layer between the components can be increased, the dispersion degree of a gelling componentcan be increased, and the workability and the homogeneity of concrete can be enhanced; the composite concrete viscosity reduction material is solid powder, can be uniformly mixed with a cementing material, has a wide application range, and can effectively improve the stability of slurry and reduce the viscosity of concrete.

Description

technical field [0001] This 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, since the buildings require 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...

Claims

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Application Information

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Patent Type & Authority Applications(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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