Abstract
The objective of this research is to evaluate quantitatively the effect of sand property on the value of flow which represents deformability of mortar. On the basis of the correlation between relative flow area of paste and free water-powder ratio by volume, modeling of relative flow area of mortar was explained. From the result obtained, it became clear that the effect of sand property on the value of mortar flow can be evaluated quantitatively by the water retaining factor for sand (βs, water retained by sand) and the flowing factor for sand (Es, water-sand ratio by volume increase unit relative flow area of mortar).
