• Raman bands at 1083, 709 and 276 cm ?1 relate to changes in compressive strength. Ratio 1083/709 correlated the compression strength of concrete. Decline around a critical peak ratio 8.78. Indirect evaluation temperature provide in-situ non-destructive testing fire damaged Cement water within concrete mass create hydrated phase which acts as glue for holding sand coarse aggregates place devel...