A kind of concrete mineral admixture and using method thereof

Abstract

The invention belongs to the building material field and in particular relates to a mineral admixture for concrete and a use method thereof. The wastes from sandstone factories are ground and then are mixed with circulating fluidized bed ash in a certain proportion, the cement content, the water to binder ratio and the water consumption in unit volume are reduced, the workability of the concrete is effectively improved and the heat of hydration is reduced. The invention is characterized by utilizing the water-reducing effect of limestone powder, adding the limestone powder and the circulating fluidized bed ash as the mineral admixtures, reducing the water consumption and the water to binder ratio and ensuring the concrete to be denser, thereby improving the strength of the concrete.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a concrete mineral admixture and a use method thereof. Background technique [0002] At present, fly ash is mostly used as concrete mineral admixture in my country, but there are few power plants that can supply high-quality fly ash. In many areas, the output of fly ash for concrete is insufficient, especially in the south and southwest regions. , the price is high, and the quality is relatively poor, which not only affects the quality of concrete, but also increases the production cost of concrete. Limestone powder is a powdery waste produced in the production process of artificial sand and gravel plants. It has low added value and pollutes the environment. It is piled up in large quantities and occupies land. Circulating fluidized bed ash is a difficult-to-use powder waste produced by the combustion of coal powder in chemical fertilizer plants. It has a large amoun...

AI Technical Summary

Problems solved by technology

[0002] At present, fly ash is mostly used as concrete mineral admixture in my country, but there are few power plants that can supply high-quality fly ash. In many areas, the output of fly ash for concrete is insufficient, especially in the south and southwest regions. , the price is high, and the quality is relatively poor, which not only affects the quality of concrete, but also increases the production cost of concrete

Limestone powder is the powder waste produced in the production process of artificial sand and gravel plants. It has low added value and pollutes the environment, and a large amount of stacking takes up land

CFB ash is a difficult-to-use powder waste produced by the combustion of pulverized coal in chemical fertilizer plants. There are a large number of storage problems, occupying land, consuming management costs and polluting the environment.