Title: Thermal characterisation of a lightweight mortar containing expanded perlite for underground insulation

Authors: W.V. Liu, D.B. Apel, V. Bindiganavile

Addresses: Department of Civil and Environmental Engineering, School of Mining and Petroleum Engineering, 6-047 Markin/CNRL Natural Resources Engineering Facility, Edmonton, Alberta T6G 2W2, Canada. ' Department of Civil and Environmental Engineering, School of Mining and Petroleum Engineering, 3-045 Markin/CNRL Natural Resources Engineering Facility, Edmonton, Alberta T6G 2W2, Canada. ' Department of Civil and Environmental Engineering, 3-020 Markin/CNRL Natural Resources Engineering Facility, Edmonton, Alberta T6G 2W2, Canada

Abstract: This paper aims to investigate the use of expanded perlite in mortar, for further application of shotcrete to thermal insulation of underground mines. Mixes were designed according to the typical proportions of underground shotcrete, with the sand volumetrically substituted by expanded perlite. Tests of samples were conducted at four ages. Transient plane source technique was utilised to measure the thermal properties. The results showed reduced weight, decreased thermal conductivity, deteriorated thermal diffusivity, and sacrificed mechanical strength with perlite addition. Experimental data analysis and explanation in this paper would establish useful fundamentals for further application of expanded perlite to underground shotcrete.

Keywords: expanded perlite; lightweight mortar; thermal insulation; underground mines; thermal properties; underground shotcrete; mining.

DOI: 10.1504/IJMME.2011.041449

International Journal of Mining and Mineral Engineering, 2011 Vol.3 No.1, pp.55 - 71

Published online: 23 Jul 2011 *

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