Analysis on the Influence of Pottery Sand on Performance of Shotcrete

Yun Que, Yule Zhang

Abstract


In order to reveal the influence mechanism of pottery sand on performance of shotcrete, the effect of mixing amount of pottery sand on performance of shotcrete were investagated based on experiment. The results indicate that collapsed slump of shotcrete increases with the increase of volume fraction of pottery sand. Volume fraction of pottery sand has some influence on compressive strength of shotcrete. Thermal conductivity of shotcrete decreases with the increase of volume fraction of pottery sand. The performance of heat insulation and preservation of shotcrete will increase with the increase of the lever of pottery sand-replacement. Thermal expansion coefficient of shotcrete are decreased first and then increased with increasing of volume fraction of pottery. The thermal expansion coefficient is the lowest when the volume fraction of pottery sand is 30%. There is a trend that all specimens expand first and then shrink. Dryness & shrinkage deformation of shotcrete is the minimum when the volume fraction of pottery sand is 30%. So, performance of temperature shrinkage and dryness & shrinkage can be improved by pottery sand, and the optimal effect can be obtained when the volume fraction of pottery sand is around 30%.


DOI
10.12783/dtetr/apetc2017/11098

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