Method for preparing novel polycarboxylic acid retarded high-performance water reducer

Abstract

The invention discloses a method for preparing a novel polycarboxylic acid retarded high-performance water reducer. The novel polycarboxylic acid retarded high-performance water reducer is prepared from a first reaction kettle, a second reaction kettle, methoxy polyethylene glycol, a methacrylic acid, a sulfuric acid (98%), phenothiazine,, hydroxyethyl acrylate, a crylic acid and the like as raw materials by esterification reaction, polymerization reaction and neutral reaction. The preparation method has the characteristics of simple process, good product dispersity, strong slump retention capacity, multiple variable factors of the molecular structure and the like, and is environmental friendly.

Description

technical field [0001] The invention relates to a preparation method of a novel CM-8 polycarboxylic acid retarding high-performance water reducer, in particular to a preparation method of a novel CM-8 polycarboxylate retarding high-performance water reducer. Background technique [0002] At present, with the development of transportation, hydropower, municipal construction and other construction projects, the gradual rise of high-span bridges, high-rise buildings, high-speed railways, expressways, urban rail transit and other engineering constructions have higher and higher requirements for concrete construction performance, and almost all require Use pumpable concrete, and high-efficiency water reducer is the fifth component that is necessary to prepare pumpable concrete. When pumped concrete needs to be transported over long distances or constructed under high temperature conditions, it will inevitably lead to slump loss of freshly mixed concrete, which will affect the qua...

AI Technical Summary

Problems solved by technology

When pumping concrete needs to be transported over long distances or constructed under high temperature conditions, it will inevitably lead to slump loss of freshly mixed concrete, which will affect the quality of concrete engineering

However, the dispersibility of traditional concrete plasticizers is not good enough, resulting in poor slump, low strength, poor fluidity, low durability, etc.