Concrete admixture, preparation method, using method and application

Abstract

The invention relates to a concrete admixture. The concrete admixture comprises the following raw materials in percentages by mass: 1-10 parts of red mud, 0.5-10 parts of flyash, 0.5-10 parts of silica fume, 0.5-5 parts of sodium gluconate and 0.5-10 parts of a water reducing agent. The problem that concrete shrinks and cracks after a traditional early strength agent is used is solved, engineeringquality is ensured, meanwhile, due to use of a large number of industrial waste residues, the production cost of the early strength agent is reduced, and marketing is facilitated. By the admixture, the problems of separation and loss of fluidity due to use of a traditional water reducing agent are solved, and the production cost is reduced. The admixture has double effects of early strength and water reducing, the problem that different admixtures are not compatible is solved, and the cost of concrete engineering is reduced.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to a concrete admixture prepared from industrial waste residue, a preparation method, a use method and an application. Background technique [0002] Red mud is a solid waste produced in the production process of the aluminum industry. According to the ore grade and process method, for every ton of alumina produced, 1~2 tons of red mud will be produced. With the development of the aluminum industry, the global alumina output in 2017 was about 130.5 million tons. my country is a big country in the aluminum industry, and the alumina output in 2017 was about 69.017 million tons. Due to the large amount of red mud discharge, a large amount of red mud cannot be fully utilized, and it can only be stacked in the yard, occupying a large amount of land and causing pollution to the environment, especially to groundwater. In recent years, the effective utilization rate of red mud is only about 15%, and ...

AI Technical Summary

Problems solved by technology

[0007] Therefore, in the process of concrete preparation, in order to achieve the early strength effect of concrete and at the same time have a certain water reduction effect, it is usually simple compounding: that is, adding the water reducing agent at the same time, and then adding the early strength agent, resulting in concrete The increase of engineering cost, the expansion of the disadvantages of different admixtures and the compatibility problems of different admixtures

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