Experimental investigation of physical, thermal, hygral and mechanical properties of cementitious composites at high temperatures

•Study on basic physical, thermal, hygral and mechanical properties of cementitious composites at high temperatures.•Five types of cementitious composites are studied.•Several testing methods are compared for each material characteristic.•Therelative decrease in compressive strength is very similar for all types of composites.•Exposure tohigh temperatures increases thegas permeability of all types of composites.