High-performance multifunctional cement reducing agent for concrete and preparation method for same

Abstract

The invention belongs to the field of concrete additives and provides a high-performance multifunctional cement reducing agent for concrete, which is characterized by including the following raw materials, by mass: 10-20% of modified polyether, 5-20% of mixed alcohol amine, 3-10% of mixed alcohol, 1-5% of unsaturated acid, 0.1-1% of modified siloxane, 0.1-0.3% of an initiator and the balanced being water. The cement reducing agent is toxic-free, is harmless, is free of environment pollution, is green and environment-friendly, is free of chlorine ion and alkali, can maintain strength grade of concrete to be not changed and can reduce the use amount of a cementing material in the concrete by 10-15 mass%. When the cement reducing agent is employed in ordinary concrete, the concrete is increased in strength by 10-20%. The cement reducing agent can improve peaceability, cohesiveness, homogeneity and anti-separation water bleeding, can improve pumpability of the concrete and can improve freezing resistance, carbonization resistance and the like durability properties of the concrete.

Description

technical field [0001] The invention belongs to the field of concrete admixtures, in particular to a multifunctional adhesive reducer for high-performance concrete and a preparation method thereof. Background technique [0002] In recent years, my country's construction industry has developed rapidly, with an unprecedented scale of construction. Concrete is one of the most important building materials. Modern buildings have higher and higher requirements for concrete, such as pursuing high performance, high strength, and high durability without increasing costs. In order to meet these requirements, it is generally necessary to increase the amount of cement. However, high cement consumption will bring the following problems: excessive heat of cement hydration, excessive concrete temperature rise, increased hazards of alkali aggregate, increased structural shrinkage and deformation, and poor crack and seepage resistance. Moreover, the cement industry is a high energy consump...

AI Technical Summary

Problems solved by technology

However, high cement consumption will bring the following problems: excessive heat of cement hydration, rapid rise in temperature of concrete, increased hazards of alkali aggregate, increased structural shrinkage and deformation, poor crack resistance and seepage resistance, etc.

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