Mechanical properties of shotcrete with calcium carbonate admixture Kalsiyum karbonat katki{dotless}h püskürtme betonun mekanik özellikleri


Tiryaki S., Tunçdemir H. , Güçlü E., Bayram O.

23rd International Mining Congress and Exhibition of Turkey, IMCET 2013, Antalya, Turkey, 16 - 19 April 2013, vol.2, pp.771-779 identifier

  • Publication Type: Conference Paper / Full Text
  • Volume: 2
  • City: Antalya
  • Country: Turkey
  • Page Numbers: pp.771-779

Abstract

Underground mining facilities have been started after exceeding the optimum open pit limit in a Turkish gold mine. Main haulage roadways are entirely excavated in non-valuable rock formation to reach a particular level which is an access to the ore body. Production galleries connected to the main haulage roadways, are excavated for extracting ore body. Shotcrete is used for reinforcing and supporting these production galleries. Production galleries have been filled just after the excavation is finished and the excavation of upper level production galleries are initiated. As shown in the working cycle, the life time of these galleries are not so long. Cement is a very expensive component of shotcrete. Cost optimization can be possible with conserving the safety factor of shotcrete by using admixtures instead of cement. The subject of this study is the mechanical analysis of the shotcrete by using calcium carbonate admixture which is cheaper relatively, instead of cement to optimize the cost of the shotcrete expense. Calcium carbonate admixture with 18%, 21%, 25%, and 30% is used instead of cement rate in total prescription. When results are analyzed, the current study indicates that shotcrete by using admixture of calcium carbonate may be used without risking the safety factor in the circumferences of production galleries.