Experimental study of the gas diffusion coefficient of heated concrete

In this paper, the effects of the water/cement (w/c) ratio and heating temperature on the gas diffusion coefficient of heated concrete are investigated. The gas diffusion coefficient of concrete increases as the heating temperature and w/c ratio increase, and the effect of the w/c ratio on the gas diffusion coefficient of concrete increases with the heating temperature. In addition, the density and porosity of heated concrete were experimentally studied, and the results exhibited a high correlation among the gas diffusion coefficient, density and porosity of heated concrete.