TY - JFULL AU - Son Tung Pham and William Prince PY - 2013/7/ TI - Non Destructive Characterisation of Cement Mortar during Carbonation T2 - International Journal of Civil and Environmental Engineering SP - 503 EP - 508 VL - 7 SN - 1307-6892 UR - https://publications.waset.org/pdf/3255 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 78, 2013 N2 - The objective of this work was to examine the changes in non destructive properties caused by carbonation of CEM II mortar. Samples of CEM II mortar were prepared and subjected to accelerated carbonation at 20°C, 65% relative humidity and 20% CO2 concentration. We examined the evolutions of the gas permeability, the thermal conductivity, the thermal diffusivity, the volume of the solid phase by helium pycnometry, the longitudinal and transverse ultrasonic velocities. The principal contribution of this work is that, apart of the gas permeability, changes in other non destructive properties have never been studied during the carbonation of cement materials. These properties are important in predicting/measuring the durability of reinforced concrete in CO2 environment. The carbonation depth and the porosity accessible to water were also reported in order to explain comprehensively the changes in non destructive parameters. ER -