The Effect of Elevated Temperature on Ordinary Portland Cements

A study was directed to analyze the influence of different types Ordinary Portland Cements (OPC) on hardened cement paste exposed high temperatures. Hardened specimens with three and nine water-cement ratios were investigated heated 11 heat steps at 28 days age. Residual compressive strength relative residual compared unheated results. It shown that expected range for OPC up 400 °C is between 90 100%. From local minimum 150 maximum 300 °C. The CEM I 52.5 type shows least favorable behavior increased (over °C) temperature, according results strengths curves newly introduced Integrated Temperature Endurance values after first ratio (0.3). Nine tested (CEM 42.5 32.5). At all ratios, tendencies two parallel. has been observed changes in have little no impact curve's shape or relationship water ratio. As a result our experiments applying simply Cement, it obvious 32.5 significantly outperformed regards post-heating tendencies.