Shotcrete is concrete that is pneumatically projected at high velocity onto a surface. The American Concrete Institute does not recommend the use of bonding agents for use in Shotcrete work because bonding compounds can act as bond breakers and the bond of Shotcrete to properly prepared substrates is excellent. The International Building Code does not have a limit on time between layers with a properly prepared sub straight, SURFACE MUST BE IN AN (Damp) SSD Condition
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