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Abstract: Lightweight dry mix shotcrete was mixed with an expanded perlite aggregate (EPA) and the thermal and mechanical properties of the resulting samples were tested. A number of EPA/sand ratios were used to produce the samples. The Hot Disk TPS was used to measure the thermal conductivity of the samples after 28 days, and values revealed that the thermal conductivity of the samples decreased with the amount of EPA added. The splitting tensile strength of the shotcrete was higher than that of conventional concrete, while the uniaxial compressive strength was similar in both cases. The authors concluded that dry mix shotcrete with EPA aggregates composed of 75% sand was a viable substitution to conventional concrete.

Reference: Cement and Concrete Composites 53 (2014) 44–51

DOI: 10.1016/j.cemconcomp.2014.06.003