Abstract
For discussing the durability of concrete, heat and moisture transfer in different ambient conditions is one of the key themes. Moisture transfer is generally regarded as an unsaturated infiltration and to follow to Darcy law. It has not yet been satisfied to estimate moisture transfer, because parameters in equation of Darcy law are nonlinear. So, through isothermal moisture absorption test and capillary infiltration test, the authors determined the water retention property of concrete as a function of the water-cement ratio, and obtained a relation of moisture diffusivity coefficient, unsaturated hydraulic conductivity and degree of saturation by the unsteady method. In addition, by conducting unsaturated infiltration analysis and comparing its results with experimental results, the effectiveness of the analytical technique was verified.
