Fly ash activator and low-cost cement prepared by using fly ash activator

Abstract

The invention belongs to the technical field of mortar concrete preparation, and particularly relates to a fly ash activator used in cement added with fly ash, which is made of the following raw materials in proportion by weight: 20-40 parts of sodium sulfate, potassium aluminum sulfate 40 to 60 parts, 3 to 6 parts of triethanolamine, 3 to 6 parts of sodium gluconate, 1 to 2 parts of citric acid and 20 to 40 parts of silicon powder; mix the above raw materials evenly and pass through a 200-mesh sieve to obtain fly ash activator. The present invention also relates to a low-cost cement prepared by using a fly ash activator, which is made of the following raw materials in proportion by weight: 40-50 parts of ordinary Portland cement, 45-50 parts of fly ash and 6 parts of fly ash activator ~10 servings. The low-cost cement poured concrete provided by the present invention has little effect on the strength of the early stage of the concrete, and the strength of the later stage increases significantly; it can reduce the heat of hydration of the concrete and reduce the shrinkage and cracking of the concrete; it can prevent the bleeding and segregation of the concrete; it can improve the concrete resistance. Corrosion ability reduces chloride ion penetration.

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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