Reasonable sample capacity for grain-size analysis tests based on sampling reliability
LI Xi1, 2, ZHANG Sheng1, 2, SHENG Dai-chao1, 2, MA Xin-yan3
1. School of Civil Engineering, Central South University, Changsha 410075, China; 2. National Engineering Laboratory for High Speed Railway Construction, Changsha 410075, China; 3. China Airport Construction Group Corporation, Beijing 100101, China
Abstract：In the process of determining particle size distribution in engineering fields, the sample capacity is one of determining factors to guarantee the accuracy and reliability of results. Combining with the theory of sampling reliability analysis, a theoretical method to determine the sample capacity is proposed and validated afterwards. It is found out that three indexes should be considered to obtain grading information of coarse aggregate: the total amount of particles, the degree of particle size difference, and the accuracy requirements. Besides, the proposed method may benefit engineering practice and specification perfection.
李希, 张升, 盛岱超, 马新岩. 基于抽样可靠性的颗分试验取样数量研究[J]. 岩土工程学报, 2016, 38(11): 2122-2127.
LI Xi, ZHANG Sheng, SHENG Dai-chao, MA Xin-yan. Reasonable sample capacity for grain-size analysis tests based on sampling reliability. Chinese J. Geot. Eng., 2016, 38(11): 2122-2127.
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