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Efficient concrete water-reducing agent and preparation method thereof

A concrete water-reducing agent and high-efficiency technology, applied in the field of concrete additives, can solve the problems of low water-reducing efficiency and poor hard water resistance of water-reducing agents, and achieve the effects of improving wettability, delaying crystallization, and increasing fluidity

Active Publication Date: 2018-11-16
YANGQUAN GAOXING BUILDING MATERIAL ADDITIVE CO LTD
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a high-efficiency concrete water-reducing agent and its preparation method in view of the problems of poor hard water resistance and low water-reducing efficiency of the current water-reducing agent

Method used

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preparation example Construction

[0029] A preparation method of high-efficiency concrete water reducer, comprising the steps of:

[0030]A. In terms of parts by mass, take 6~9 parts of water-reducing agent matrix, 4~7 parts of acrylic acid, 2~5 parts of sodium methacrylate, and 80~90 parts of water to obtain the matrix, and heat up to 50~ At 60°C, add ammonium persulfate dropwise at 1-3% of the base substance, and control the dropping time for 40-50 minutes, then raise the temperature to 60-70°C and stir and mix for 3-5 hours, adjust the pH to 6-7, and cool to room temperature to obtain Coolant;

[0031] B. According to the number of parts by mass, take 20~30 parts of cooling material, 3~8 parts of anti-hard water chelating additive, 0.03~0.05 part of early strength additive, and 8~15 parts of montmorillonite, mix, dry, and crush through a 200-mesh sieve , and collect the sieved particles a to obtain a high-efficiency concrete superplasticizer.

[0032] Water-reducing agent matrix: S1. Take acrylic acid and...

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Abstract

The invention discloses an efficient concrete water-reducing agent and a preparation method thereof, and belongs to the technical field of concrete additives. Acrylic acid is used as a raw material, and polyethylene glycol monomethyl ether is added. Through an esterification reaction, a macromonomer is obtained; and citric acid is added for modification to reduce formation of calcium silicate hydrated gel so as to obtain higher water-reducing rate. L-aspartic acid is used as a raw material, and carboxyl anions are formed. Then, the water-reducing agent still can be greatly dispersed under thecondition of hard water to play a water-reducing effect. By introducing triethanolamine, solubility of concrete particle surface is raised, and water-reducing efficiency is enhanced. Problems of existing water-reducing agents, such as poor hard water resistance and low water-reducing efficiency are solved.

Description

technical field [0001] The invention belongs to the technical field of concrete additives, and in particular relates to a high-efficiency concrete water reducer and a preparation method thereof. Background technique [0002] Concrete is a general term for engineering composite materials in which aggregates are cemented into a whole by cementitious materials. Generally speaking, the term concrete refers to the cement concrete obtained by using cement as the cementitious material, sand and stone as the aggregate; mixed with water (may contain admixtures and admixtures) in a certain proportion, and stirred. Concrete, which is widely used in civil engineering. In the operation of cement mixture, in order to make the operation labor-saving and effective, early demoulding shortens the construction period, the cement mixture is required to have high fluidity, and at the same time, the cement mixture can effectively inhibit the loss of slump, and there is sufficient early stage of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32C04B103/30
CPCC04B40/0039C04B2103/302C04B24/04C04B24/32C04B24/02C04B24/20C04B24/14C04B22/165C04B24/16C04B22/062C04B24/122C04B22/147C04B14/104
Inventor 刘菊花路芸庞成荣
Owner YANGQUAN GAOXING BUILDING MATERIAL ADDITIVE CO LTD
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