Effect of Elevated Temperature on the Compressive Strength of Waste Tile Aggregate Concrete

The research aims to investigate the effect of elevated temperature on the compressive strength of concrete containing waste tile aggregate. Two water-to-cement ratios (w/c = 0.4 and 0.6) and three replacement ratios of waste tile aggregate (0%, 50% and 100%) were selected for producing concrete specimens. Experiment results showed that the slump of concrete were increased with the increase of the replacement ratio of waste tile aggregate. The compressive strength of concrete decreased with the increase of waste tile aggregate. The concrete with higher w/c of 0.6 can present equivalent compressive strength for that of the replacement ratio of waste tile aggregate under 50%; on the contrary, the concrete with lower w/c of 0.4 can have higher compressive strength for the replacement ratio increased to 100%. In addition, when the subjected temperature exceeded 440°C and raised to 800°C, the compressive strength of concrete decayed seriously and the residual strengths was almost the same at 800°C. Consequently, the fire resistance of waste tile aggregate concrete may be comparable to that of natural aggregate concrete.