The influence of high temperature curing on the compressive, tensile and flexural strength of pulverized fuel ash concrete

This paper presents the results of a series of experiments conducted to investigate the effect of high temperature curing on the compressive strength, tensile splitting strength and flexural strength of concrete made with Hong Kong pulverized fuel ash (PFA). The curing temperatures adopted were 27, 34, 42 and 50°C. The experimental results suggest that high temperature cured PFA concrete normally has a greater compressive strength, tensile splitting strength and flexural strength than similarly cured ordinary Portland cement (OPC) concrete. The results obtained further suggest that beyond 28 d age and at high curing temperatures, the difference in strength properties between them is significant.