Authors: Reny, S; Ginouse, N

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Reny, S & Ginouse, N 2014, 'Development of a rapid strength gain dry-mix shotcrete using calcium sulfo-aluminate cement for mining and tunnelling applications', in M Hudyma & Y Potvin (eds), Deep Mining 2014: Proceedings of the Seventh International Conference on Deep and High Stress Mining, Australian Centre for Geomechanics, Perth, pp. 281-290,

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This paper demonstrates the possibility of significantly speeding up the mining and tunnelling process using a calcium sulfo-aluminate (CSA) cement based dry-mix shotcrete. An important testing program including, mix design optimisation, laboratory and in situ underground tests on early and later age performances is presented. Tests results show that the shotcrete mix developed can provide a compressive strength of 20 MPa in only 2 h after shooting. Based on these results, the use of a CSA cement based dry-mix shotcrete mixture appears to provide a robust and promising solution for ground support in mining and tunnelling applications.

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