A kind of preparation method and application of phase change river sand with high refractory performance

Abstract

The invention discloses a method for preparing phase-change river sand with high refractory performance. The river sand is calcined at a constant temperature to change from alpha phase to beta phase, and then quenched with water to make the phase change finalized. The invention pre-phase-transforms and shapes the river sand through high-temperature calcination and water quenching, so as to eliminate the volume effect of the river sand at high temperature; the invention also provides the application of the phase-change river sand in the preparation of high refractory performance concrete. This method effectively solves the concrete cracking problem caused by the instantaneous volume expansion of river sand when the river sand experiences high temperature, thereby improving the fire resistance of ordinary concrete, and at the same time, the mechanical strength is also greatly improved.

Description

technical field [0001] The invention relates to a preparation method and application of phase-change river sand with high refractory performance, belonging to the field of building materials. Background technique [0002] With the development of the economy and the improvement of people's living standards, cement concrete buildings are being built rapidly at home and abroad. However, the fire resistance level of ordinary concrete buildings is low, and they are easy to collapse in a fire accident. Therefore, the use of concrete with high fire resistance is an effective way to reduce property losses and casualties in fire accidents. [0003] At present, the fire resistance of concrete can be improved by adding refractory materials to ordinary concrete or directly setting a fireproof layer for concrete structures. But the cost of these two methods is too high, and they have little effect on the huge ordinary concrete market. However, it is impossible to directly improve the ...

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Problems solved by technology

But the cost of these two methods is too high, and for the huge ordinary concrete market, they play little role

However, it is impossible to directly improve the fire resistance rating of ordinary concrete buildings according to the existing economic conditions.

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