Effect of elevated temperature on mechanical properties of blended cement mortar

الملخص EN

An experimental investigation was conducted to evaluate the performance of mortars composed of ordinary Portland cement (OPC) partially replaced with met kaolin (MK) and / or silica fume (SF) exposed to elevated temperature.

Eighteen different mixtures were designed to have a mortar flow of 94 ± 5 %.

The mortars had binder : sand ratios of 1 : 5.23.

Three specimens from each mix were tested for compressive strength at ambient temperature, control sample.

The other specimens were exposed to a gradual increase in temperature to 200˚C, 400˚C, 600˚C and 800˚C for two hours duration in an electrical symmetrical furnace.

The residual compressive strength was evaluated for all samples.

The optimum mixtures for improving residual compressive strength using MK and / or SF as cement replacement are reported.