关于混凝土强度现场检测中钻芯修正问题的探讨

Discussion on the Problems of Core Sample Correct in the Site of Concrete Strength Test

通过分析回弹法检测混凝土抗压强度结果不确定性的原因,提出钻芯修正的目的,即保证修正后的回弹法检测结果在均值意义上与钻芯法检测结果一致根据实际工程数据,说明芯样强度与对应测区回弹换算强度之间并不存在特定的相关性公式推导结果表明,钻芯修正时,芯样数量是由芯样强度变异系数确定的在此基础上,介绍了4种修正方法,并通过其计算方法的比较。

By analysis the uncertainty reason of concrete press strength which inspected by rebound method, the purpose of core sample correct was provided, that is, identical tested results in mean statistically have been got between rebound method and core sample method. Based on actual engineering data, there is not special relationship between core sample strength and conversed rebound strength in corresponding area. The formula deduced result indicate that, the number of core sample is decided by variance coefficient while core sample corrected. On the basis of it, four correct methods were introduced, based on the comparing with other calculating, the whole quantity correct method should be used firstly when the core sample correct value is got.