Polycarboxylic acid water reducer and preparation method

Abstract

The invention discloses a polycarboxylic acid water reducer and a preparation method. The water reducer is good in anti-mud adaptability, and low in mixing amount. The polycarboxylic acid water reducer and the preparation method are achieved through the following technical scheme: the polycarboxylic acid water reducer is prepared from the following raw materials in parts by weight: 330-370 parts of methylallyl alcohol polyoxyethylene ether, 10-30 parts of acrylic acid, 15-30 parts of hydroxyethyl acrylate, 3-10 parts of citric acid, 1-5 parts of tartaric acid, 2-3 parts of mercapto-1-propanol,5-10 parts of sodium methallyl sulfonate, 3-5 parts of ammonium persulfate, 1-5 parts of potassium dichromate, 0.5-1 part of polyacrylamide, 1-4 parts of potassium persulfate, and appropriate amountsof sodium hydroxide and deionized water. The water reducer has efficient particle dispersing performance and retention capability, and is low in cost, high in concrete adaptability, good in anti-mudproperty, good in concrete workability, good in slump retaining performance, and stable in quality.

Description

technical field [0001] The invention discloses a polycarboxylate water reducer and a preparation method thereof, belonging to the technical field of water reducers. Background technique [0002] Polycarboxylate superplasticizer is the basic material for preparing high-performance concrete. It has excellent properties such as high water reducing rate, high slump retention, high reinforcement and high durability. Polycarboxylate superplasticizer can reduce mixing water consumption and improve concrete strength. It is more and more widely used in concrete engineering. However, due to the wide variety of raw materials used in the production of concrete and the large regional differences, various inadaptability problems of polycarboxylate superplasticizers have occurred in practical applications, such as excessive loss of concrete slump over time, bleeding and segregation Serious phenomenon, high sensitivity, etc. The above problems have seriously affected the normal constructi...

AI Technical Summary

Problems solved by technology

However, due to the wide variety of raw materials used in the production of concrete and the large regional differences, various inadaptability problems of polycarboxylate superplasticizers have occurred in practical applications, such as excessive loss of concrete slump over time, bleeding and segregation Serious phenomenon, high sensitivity, etc.

The above problems seriously affect the normal construction of concrete and bring hidden dangers to the quality of the project.

[0003] A large number of engineering examples and studies have shown that clay minerals will lead to a decrease in the strength and durability of concrete, and significantly reduce the dispersion performance of water reducers, especially polycarboxylate water reducers

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