Freeze-resisting concrete

Abstract

The invention relates to freeze-resisting concrete. When the concrete is prepared, pulverized coal ash is added, the mixing amount of the pulverized coal ash is 10-25% of the weight of a gel material.The pulverized coal ash in the application is treated and modified, so that the activity of the pulverized coal ash can be improved, the hydration speed of the pulverized coal ash is accelerated, thestrength developing speed of the concrete after the pulverized coal ash is added is accelerated, and the conservation time of the concrete is shortened; besides, internal holes of the concrete are stuffed, so that the freezing resistance of the concrete is improved, the cost of the concrete can also be significantly reduced, and the cost of the concrete can be reduced by 5-10%.

Description

technical field The invention belongs to the field of environment-friendly building materials, and in particular relates to frost-resistant concrete. Background technique Fly ash is the fine ash collected from the flue gas after coal combustion. Fly ash is the main solid waste discharged from coal-fired power plants. The main oxide composition of fly ash in thermal power plants in my country is: SiO2, Al2O3, FeO, Fe2O3, CaO, TiO2, etc. With the development of the power industry, the discharge of fly ash from coal-fired power plants has increased year by year, becoming one of the largest industrial wastes in my country. If a large amount of fly ash is not treated, it will generate dust and pollute the atmosphere; if it is discharged into the water system, it will cause river silting, and the toxic chemicals in it will also cause harm to human beings and organisms. However, fly ash can be used as a resource, such as as an admixture for concrete. Although fly ash can be use...

AI Technical Summary

Problems solved by technology

Although fly ash can be used as a concrete additive, it will have a negative impact on the strength development of concrete, resulting in insufficient early strength of concrete, requiring prolonged curing time. On the other hand, it will also reduce the frost resistance of concrete. Therefore, in order to improve Frost resistance often requires the synergistic use of fly ash and air-entraining agent, resulting in increased cost

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