The cleavage strength test has been carried out to investigate the effect of pour direction for the strength of specimen without mechanical joint element ; the effect of mechanical joint element for the cleavage strength ; the effect of different materials which were used to embedding bars for the cleavage strength 对比了老混凝土表面处理相同的情况下，不同浇筑方位对无机械连接件试件劈拉强度的影响；机械连接件对劈拉强度的影响；不同植筋材料对劈拉强度的影响。
