Evaluating residual compressive strength of post-fire concrete using Raman Spectroscopy

• 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 develop strong construction material. The most important cement matrix is that calcium silicate hydrate (CSH), largely responsible Decomposition CSH due high temperatures will affect , are representative CaCO 3 presence phases can be used assess result thermal decomposition. between was calculated results show there rapid decline 8.78 residual 0.62, closely following polynomial curve. tool developed here allows an indirect has been exposed by studying band. A case study from scene taken warehouse Kingston (Jamaica) also presented with conclusion compared. showed spectroscopy potential rapidly accurately.