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Abstract: The shotcrete technique is a method used to pneumatically spray concrete at mine openings to provide insulative working environments. This study tested the thermal conductivity of Expanded Perlite Aggregate (EPA) to determine its effectiveness as an insulative material in conjunction with concrete for mining applications. A Thermal Constants Analyser TPS 1500 measured the thermal conductivity of the EPA composites using the transient plane source (TPS) method. Results showed that the addition of EPA dramatically enhanced the insulative properties of concrete, likely due to the porous structure of EPA.

Reference: International Journal of Mining and Mineral Engineering, 3, 1 (2011)

DOI: 10.1504/IJMME.2011.041449