Preparation and Performance Analysis of Composite Heat Insulation Concrete for Mine

In order to study the performance of composite heat insulation concrete for mine, mixture ratio design of 18 group samples were designed based on the orthogonal design theory, then its strength and thermal conductivity were test. The integrated balance method is used to analyze the test data, and established the model of thermal conductivity theory. Through comparing with the measured thermal conductivity, the effect factors on thermal conductivity and compressive strength were analyzed including cement, glass beads, sand, shale, gravel and glass fiber content. The optimal mix proportion of concrete insulation is determined in consideration of the economy. The correctness of the mix ratio is verified by using performance retest. 7d compressive strength is 28.12MPa, and it’s thermal conductivity is 1.21W/(m·K) for composite heat insulation concrete. Research results laid the foundation for insulation heat supporting structure apply to mine