Retarding water reducing agent

Abstract

The present invention belongs to the technical field of water reducing agents, and particularly relates to a concrete retarding water reducing agent, which comprises a water reducing agent, a retarder and a reducing agent, wherein a weight ratio of the water reducing agent o the retarder is 9:1-7:3, the reducing agent accounts for 0.01-0.04% of the total weight of the water reducing agent and the retarder, the water reducing agent is a naphthalene sulfonic acid formaldehyde condensation water reducing agent, the reducing agent is SRA-3, and the retarder is one or a plurality of materials selected from ferrous sulfate, sodium fluorosilicate, ferrous carbonate, cellulose ether and cadmium sulfate. According to the present invention, with the efficient retarding water reducing agent, the cement particles can be dispersed, the workability of concrete can be improved, the water consumption per unit can be reduced, the strength of concrete can be increased, the durability of concrete can be improved, the cement consumption per unit can be reduced, and the concrete cost can be reduced; and the product has effects of concrete setting time delaying, early strength, water reducing and the like.

Description

technical field [0001] The invention belongs to the technical field of retarded water reducers, in particular to a retarded water reducer. 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 the normal hydration of cement...

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