Concrete viscosity reducer and preparation method thereof

Abstract

The invention discloses a concrete viscosity reducer and a preparation method thereof. The viscosity reducer is prepared from raw materials including 1,4-butanediol vinyl ether, unsaturated amide and unsaturated phosphate ester through polymerization. The production process of the prepared concrete viscosity reducer is simple, the concrete viscosity reducer has good adaptability with a polycarboxylate water reducer, the concrete viscosity reducer in the mass 0.01%-0.03% that of gel materials is mixed with concrete, the workability of the concrete can be remarkably improved, and the problems that the concrete viscosity is high and concrete is difficult to pump at a low water-gel ratio are effectively solved.

Description

technical field

[0001] The invention belongs to the technical field of chemical building materials, and relates to a concrete viscosity reducer and a preparation method thereof. Background technique

[0002] In recent years, with the development of large-scale and high-rise building structures in my country, the requirements for concrete strength are getting higher and higher. In order to improve the strength of concrete, high-strength cement is generally used, the amount of cementitious materials is increased, and the water-binder ratio is reduced. However, these measures often lead to increased concrete viscosity and slower flow rate, which is not conducive to pumping and construction. In addition, due to the shortage of river sand resources, a large amount of machine-made sand is also used in the preparation of the above-mentioned concrete. The machine-made sand has many edges and corners and poor gradation, which makes the viscosity problem more prominent.

[0003] In o...

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