Blending material for high-early-strength concrete

Abstract

The invention relates to an admixture for high early strength of concrete, characterized in that the admixture is formed by mixing and stirring cement clinkers, industrial residues, early strength agents, plaster, water reducing agents and excitants. The parts by weight of the components are as follows: 100 parts of cement clinkers, 500-2000 parts of industrial residues, 0.2-3 parts of early strength agents, 1-3 parts of plaster, 0.2-2 parts of water reducing agents and 1-5 parts of excitants. The excitant is the mixture of aluminum hydroxide, calcium nitrite and calcium nitrate; wherein, the aluminum hydroxide accounts for 50% of the mixture while the calcium nitrite and the calcium nitrate are in any proportion; the early strength agent is the mixture of trolamine, lithium carbonate and calcium formate, wherein, the trolamine accounts for 50% of the mixture while the lithium carbonate and the calcium formate are in any proportion. The admixture for concrete provided by the invention has high activity index and low content of harmful ions. Adding the admixture can obviously improve the demoulding strength, long-term mechanical property and durability of the concrete.

Description

technical field [0001] The invention relates to a concrete admixture, which is suitable for preparing the admixture for high early strength concrete. Background technique [0002] With the increase of comprehensive national strength, our country is carrying out large-scale infrastructure construction. The main way to reduce the cost of raw materials is to use a large number of admixtures in concrete and reduce the amount of cement. However, directly adding mineral admixtures to replace cement will lead to a decline in the early strength of concrete. serious. Aiming at the high early strength, high strength and high durability requirements of concrete, the special concrete admixture provided by the invention can solve this problem. Contents of the invention [0003] The purpose of the present invention is to provide the admixture for high early strength concrete with higher activity index and lower harmful ion content, and the addition of this admixture can significantly i...

AI Technical Summary

Problems solved by technology

[0002] With the enhancement of comprehensive national strength, our country is carrying out large-scale infrastructure construction. The main way to reduce the cost of raw materials is to use a large number of admixtures in concrete and reduce the amount of cement. However, directly adding mineral admixtures to replace cement will lead to a decline in the early strength of concrete. serious

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