| abstract |
The present invention is a mixture of calcium aluminate-based cemented carbide and cement-based fasteners composed of carbonates, such as K 2 CO 3 , Na 2 CO 3 , calcium hydroxide, calcined lime, sodium aluminate, etc. The present invention relates to a fastening additive manufactured and manufactured, which not only terminates in minutes which are impossible with conventional fasteners or cemented carbide, but also exhibits high strength of 20 kgf / cm 2 or more, and the rebound amount of shotcrete after spraying is significantly reduced to 15 wt% or less. The invention relates to a quickening additive composition.n n n Quick Additive, Quick Additive, Super Hard Cement, Shotcrete |