摘要
总结了钻芯法检测混凝土强度的局限性,基于钻芯法提出了芯样的多次横向劈拉,并从置信区间推算精度,置信区间上、下限的差值,变差系数上限三个方面分析了增加抽样数量可以提高检测精度,缩小置信区间差值,减小变差系数的上限,以满足规范要求的优点,从理论上证明多次横向劈拉法的合理性。
This paper sums up the limitations of the core drilling method. Basing on this method , it presents the several times of transverse cutting on the concrete cylinder. Increasing the number of sampling has many advantages, such as increasing the accuracy of testing, reducing the difference of confidence interval and the coefficient of variation, which meet the code requirements. These three aspects prove that it is reasonable to use the several times of transverse cutting.
出处
《四川建筑科学研究》
北大核心
2010年第1期84-87,共4页
Sichuan Building Science
基金
国家自然科学基金项目(50578126)
关键词
钻芯法
多次横向劈拉
置信区间
变差系数
抽样数量
core drilling method
several times of transverse cutting
confidence interval
coefficient of variation
the number of sampling
