Coal ash activating agent and low-cost cement prepared through same

Abstract

The invention belongs to the technical field of mortar concrete preparation, and particularly relates to a coal ash activating agent for cement added with coal ash. The coal ash activating agent is prepared from, by weight, 20-40 parts of anhydrous sodium sulphate, 40-60 parts of aluminum potassium sulfate, 3-6 parts of triethanolamine, 3-6 parts of sodium gluconate, 1-2 parts of citric acid and 20-40 parts of silica powder. The raw materials are evenly mixed, smashed and screened through a screen with the mesh number of 200, and the coal ash activating agent is obtained. The invention further relates to the low-cost cement prepared through the coal ash activating agent. The low-cost cement is prepared from, by weight, 40-50 parts of ordinary Portland cement, 45-50 parts of the coal ash and 6-10 parts of the coal ash activating agent. As for concrete poured through the low-cost cement, the early strength of the concrete is hardly affected, and the later strength is obviously increased; hydration heat of the concrete can be reduced, and shrinkage cracking of the concrete can be relieved; the phenomena of bleeding and disintegration of the concrete can be prevented; the corrosion resistance of the concrete can be improved, and chlorine ion penetration can be relieved.

Description

technical field [0001] The invention belongs to the technical field of mortar concrete preparation, in particular to a fly ash activator used in cement added with fly ash, and also relates to low-cost cement prepared by using the fly ash activator. Background technique [0002] With the implementation of the sustainable development strategy and the implementation of national energy-saving emission reduction and green environmental protection policies, the resources, energy, and environment of the cement industry have become the main factors that are restricted. Use less Portland cement clinker and use it as much as possible. The production of cement from industrial waste is a topic with environmental significance and economic value. Fly ash is mainly solid waste discharged from coal-fired thermal power plants. Fly ash is one of the industrial wastes with the largest discharge and stacking volume in my country. The utilization rate in China is less than 40%, and the rest can ...

AI Technical Summary

Problems solved by technology

However, if the proportion of fly ash added exceeds 30%, it will reduce the strength of concrete, affect the performance of concrete, and cause concrete shrinkage and cracking

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