Experimental Study on Plastering Light Weight Cement Mortar on Its Moisture Movements

Abstract

In order to preventing from exfoliation of light weight cement mortar rendering on structural bodies such as reinforced concrete, drying shrinkage strain and mass reduction of rendering layers with 4 types of mix proportions, which were designed according to different degrees of flow at fresh mortar, were measured in experiments. As a result, the following items are clarified; (1)Drying shrinkage strain of under sides, which were shrinkage ones, was larger than one of upper sides, furthermore almost all upper sides, were warped convexly. (2)All of contraction strain for a month term were about 1500μ and not different from each other.