Effect of temperature on fly ash concrete
  A. Venkateswara Rao and K. Srinivasa Rao
  The present study deals with the behavior of concrete with fly ash at elevated temperatures. Concrete cubes of 100 mm are prepared by replacing the cement with fly ash in a range of 30 50% by weight of cement. The prepared specimens are cured for 7, 28, 56 and 91 days, then dried and are exposed to elevated temperatures ranging 100 - 500oC for a period of 1 h and 3 h, to investigate the effect of temperature on compressive strength. It is observed that the residual compressive strength of concrete initially increased with increase in temperature, later decreased with further increase in temperature.