Retarding and water reducing agent based on boric acid or borax

Abstract

The invention belongs to the technical field of water reducing agents and particularly relates to a retarding and water reducing agent based on boric acid or borax. The retarding and water reducing agent based on boric acid or borax is prepared from a water reducing agent, a retarding agent and a shrinkage reducing agent, wherein the weight ratio of the water reducing agent to the retarding agent is 6:4-9:1, the shrinkage reducing agent accounts for 0.01-0.03% of the total weight of the water reducing agent and the retarding agent, a tea sulfurate and formaldehyde condensation water reducing agent serves as the water reducing agent, SRA-3 serves as the shrinkage reducing agent, and boric acid or borax serves as the retarding agent. By means of the efficient retarding and water reducing agent, cement particles can be dispersed, and the workability of concrete can be improved; unit water use can be reduced, the strength of concrete can be improved, and the durability of concrete can be improved; unit cement use can be reduced, and the cost of concrete can be reduced. The product has the effects of retarding condensation of concrete, promoting early strength, reducing water and the like.

Description

technical field [0001] The invention belongs to the technical field of retarding water reducers, in particular to a retarding water reducer based on boric acid or borax. Background technique [0002] The retarding high-efficiency superplasticizer is an admixture widely used in concrete admixtures. It is an admixture that retards the setting and greatly reduces the amount of mixing water. With the development of basic construction, more and higher requirements are put forward for the performance of concrete. [0003] The high-performance water reducer has a high dispersion effect on cement and can better maintain the brightness of concrete. Infiltration of such admixtures can make the concrete have high performance, and high-strength high-performance concrete can be obtained. [0004] The existing retarding superplasticizer is difficult to form an insoluble film on the surface of cement particles, which is difficult to act as a barrier to the hydration of cement and hinders...

AI Technical Summary

Problems solved by technology

[0004] The existing retarding superplasticizer is difficult to form an insoluble film on the surface of cement particles, which is difficult to act as a barrier to the hydration of cement and hinders the normal hydration of cement. These will lead to faster hydration of cement, or slow down The coagulation effect is not obvious, shortening the normal setting time of cement