Temperature sensitivity analysis on mechanical properties of phase changing material incorporated rigid pavement

Abstract

Phase changing materials (PCM) are used to improve thermal performance of rigid pavement. PCM impregnated sintered fly ash aggregate (SFA) were replaced with conventional aggregate to improve the thermal performance of concrete. Rigid pavement needs to be strong and stable at high temperatures for structural reasons. Using PCM in pavement affects the on overall performance of concrete at high temperatures In this study, temperature sensitivity of PCM incorporated concrete were inspected and compared with conventional mixes. Mechanical (compressive, tensile and flexural) strength was inspected and compared to study the effect of PCM incorporated concrete subjected to different temperatures. Arrhenius model taken in accounts to inspect factor of temperature sensitivity related to mechanical strength to estimate temperature dependence of concrete by PCM. Reduction in mechanical strength was observed with increasing the PCM content in concrete. Similarly, reduction in mechanical strength were inspected by increasing temperature of PCM modified concrete. Temperature sensitivity values are increased by increasing the PCM content in concrete pavement. The current research emphasizes the importance of considering temperature sensitivity when incorporating PCM in rigid pavement design.