Method for preparing concrete quick-setting agent

Abstract

The invention relates to a preparation method of a concrete quick-setting agent, and belongs to the technical field of quick-setting agents. The concrete quick-setting agent is an alkali-free and chlorine-free liquid concrete quick-setting agent, and has less damage to a construction worker when used; the concrete quick-setting agent utilizes the elasticity of a polyurethane material and the rigidity of silica to improve the overall density of concrete and greatly improve the strength of the concrete when acting on the concrete, the concrete quick-setting agent reduces the damage to the construction worker during construction, is remarkable in coagulation promoting effect, small in later stage strength loss, good in durability, green and environmentally-friendly and the concrete quick-setting agent can be widely used in the technical field of concrete quick setting agent preparation. The polyurethane has the advantages of good resilience and high mechanical strength, and the silica hascertain rigidity, and he surface of nano silica particles is coated with a layer of the elastic polyurethane to obtain elastic nanoparticles with a certain surface elasticity and internal hardness; by mixing the elastic nanoparticles into the liquid quick-setting agent, the strength of the concrete is increased.

Description

technical field [0001] The invention relates to a preparation method of a concrete quick-setting agent, belonging to the technical field of quick-setting agents. Background technique [0002] Concrete quick-setting agent is a chemical admixture that can make cement or concrete set quickly, and is sometimes called a setting accelerator. At present, accelerators have been widely used in shotcrete construction of tunnels, urban construction, water conservancy and electric power culverts, water diversion tunnels and other underground projects, self-waterproof shotcrete support, leak prevention, plugging construction, rapid construction of ground concrete and emergency concrete construction. Emergency and other projects. [0003] Concrete accelerator is mainly used in the construction of sprayed concrete, generally used in tunnels, culverts, industrial and mining construction, and generally added at the nozzle when sprayed concrete. At the end of the 20th century, concrete acce...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention: Aiming at the problem of insufficient strength of concrete in the later