【摘要】 结合一工程实例 ,对混凝土冷缝面的粘结劈拉强度进行了分析 ,经检验 ,该冷缝面的粘结劈拉强度试验数据服从指数分布。在保证率为 95 %时 ,其标准值为 0 .35 9N/ m m2 ,仅为设计状态下 C2 0混凝土劈拉强度标准值的 2 0 .3% ,说明混凝土冷缝是粘结强度较低、质量较差的一个危害严重的病害面。更多还原

【Abstract】 The bond strength of concrete inside interface is analyzed based on an engineering case.Through the check of probability distribution,it is found that the test results of split tensile strength of the concrete interface obey exponential distribution.Under the confidence level of 95%,the normal value is 0.359N/mm2,which is only 20.3% of the normal value of design split tensile strength of C20 concrete.It is shown that the concrete inside interface has great harm in the engineering for its low bond strength and bad quality.更多还原