Concrete high-efficiency slow setting water reducing agent

Abstract

The invention belongs to the technical field of a water reducer, and concretely relates to a concrete high-efficiency slow setting water reducing agent comprising a water reducer, a retarder and a shrinkage reducing agent. a weight ratio of the water reducer and the slow setting water reducing agent is 9:1-6:4, and the weight percentage of the shrinkage reducing agent accounts for 0.01-0.03% of gross weight percentage of the water reducer and the retarder, and the water reducer is the naphthalene sulfonic acid-formaldehyde water reducer, and the shrinkage reducing agent is SRA-4; and the retarder is one or more from ferrous sulphate, sodium fluosilicate, ferrous carbonate, cellulose ether, and cadmium sulfate. The high-efficiency slow setting high-efficiency water reducing agent is capable of dispersing the cement particles; improving the workability of the concrete, reducing the water usage amount per unit, enhancing the concrete intensity and increasing the endurance of the concrete; reducing the cement usage amount per unit, and reducing the cost of the concrete. The product has the effects of delay of the coagulation time of the concrete, high early strength, and water reduction.

Description

technical field [0001] The invention belongs to the technical field of retarding water reducers, in particular to a high-efficiency retarding water reducer for concrete. 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