In this study, we examined the compressive component of half precast concrete. Form work is unnecessary in half precast concrete, and it is able to reduce cost of the construction. In Japan, the damage of housing by Typhoon and Tornado occurs frequently in recent years. Therefore, there is a possibility that the construction of half precast concrete house will increase in the future. The section of half precast concrete is consisted of two kinds of concrete. However, most studies of concrete engineering have focused on single layer concrete. The studies of double layer concrete are not enough. It was confirmed that the maximum compressive load of the compression member increased by making the aspect of the mortar double layer of a shell and a core by the past study. In this study, we made non-line mortar specimen (diameter: 100mm) imitated half precast concrete column. By the experiment, we examined the design formula of maximum compressive load of half precast concrete. We proposed a design formula to add ΔP (increment by sectional constitution of plural concrete, 28 kN in this experiment) to Pms (maximum compressive load by calculating the product of the compressive strength, in consideration of the distortion in the specimen fracture, and cross-sectional area of the shell and core).
Full Text (PDF)