Heat resistance concrete and preparation method thereof

Abstract

The invention relates to heat resistance concrete and a preparation method thereof. The heat resistance concrete is prepared from the following raw materials comprising portland cement, coal ash, basalt with the particle size of between 20 and 40 millimeters, gravels with the continuous level of between 5 and 25, medium-coarse sand, a corrosion inhibitor, a water reducing agent, water and the like. The preparation method comprises the following steps of: selecting the raw materials; mechanically stirring for 2 to 3 minutes; after the raw materials are stirred and mixed uniformly, hierarchically pouring, wherein each layer is 25 to 30 centimeters thick; and after pouring, maintaining for at least 7 days in a damp environment with temperature of between 15 and 25 DEG C. The concrete prepared by stirring the raw materials according to the proportions has high peaceability and favorable viscosity; the performance of the mixture meets the construction requirement; the prepared concrete has the heat resistance of between 700 and 1,200 DEG C, the strength level of between C25 and C30, the high temperature strength of between 3.5 and 20 Mpa and the slumps of between 160 and 180 centimeters, can be pumped for construction, and is suitable for engineering with relatively high temperature and zero acid-base erosion.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a heat-resistant concrete and a preparation method thereof. Background technique [0002] The fire resistance of buildings is not only related to structural design, but also inseparable from the fire resistance of building materials. Therefore, it is of great significance to study the high temperature resistance of building materials. Heat-resistant concrete is a kind of concrete that can be used at 250°C to 900°C for a long time, and can maintain the required physical and mechanical properties and volume stability. According to the different binders used, heat-resistant concrete can be divided into: silicate heat-resistant concrete; aluminate heat-resistant concrete; phosphate heat-resistant concrete; sulfate heat-resistant concrete; water glass heat-resistant concrete; Thermal concrete; heat-resistant concrete with other binders. According to the hardening conditions, it ...

AI Technical Summary

Problems solved by technology

Chinese patent document CN102060489A discloses a high-strength heat-resistant concrete, which uses granulated blast furnace slag as aggregate, and the test shows that there are swelling points on the surface of the concrete test block after burning at 500 ° C, indicating that the heat resistance cannot meet the requirements. Requirements; therefore, it is very necessary to develop fire-resistant and heat-resistant concrete with good fire resistance and heat resistance, and economical and applicable