Abstract
Although a large number of researches has been carried out into the relation between total void content of porous concrete and properties of materials, or mix proportion, those conclusions are based on experiments. Little is known about a theoretical solution to void content. In this study, we contrived a theoretical model of void content in porous concrete aimed at the filling condition, that model was based on properties of mortar covered coarse aggregate in porous concrete. And then, we examined an theoretical equation of total void content leaded to the model. The result of our experiment clearly shows that void content calculated from the equation used properties of materials and mix proportion accommodated to measured void content. Moreover, we thought to need to incorporate air content in the model. We suggested a definition of porous concrete leaded to new concept of concrete used to relation between mortar-void of coarse aggregate ratio and paste-void of fine aggregate ratio. From the theoretical model, we proposed the mix design method of porous concrete that could calculate unit content of materials from target void content.
