Abstract
Construction joints have to be executed very carefully. Generally, fresh concrete is placed after operation of green cut or chipping of old concrete. Cement mortar or epoxy resin is placed just before fresh concrete is placed. In this paper, characteristics of polymer-modified mortar as a joint material are investigated as a stand point of flexural and shearing behaviors of RC beam having a vertical or horizontal construction joint under various conditions. Experimental parametars are such as an open-time which is a time between placement of polymer-modified mortar on joint and placement of fresh concrete, a thickness of polymer-modified mortar, ages of concrete, kinds of joint materials and so on.
