Journal article
Statistical Characteristics of Microhardness of Hardened Cement Paste
Journal of Wuhan University of Technology. Materials science edition, Vol.33(4), pp.924-931
08/2018
Handle:
https://hdl.handle.net/2376/120164
Abstract
Due to the intrinsic nature of a heterogeneous and anisotropic microstructure of cement based materials and the small indentation size, the measured microhardness values are subject to considerable variability. This work presents an in-depth assessment of microhardness of hardened cement pastes (HCPs) from a statistical perspective. Hundreds of microhardness measurements were conducted on an HCP sample using a Vickers Microhardness Tester. The results showed that the microhardness measured from the HCP sample significantly scattered with a large standard deviation, varying from tens to hundreds. The data-set of microhardness values was not normally distributed but fit best with a three-parameter lognormal model. By using a statistical software, the probability density function of the microhardness distribution can be readily obtained. The arithmetic mean and its 95% confidence intervals of the measured microhardness values can be used to best represent the microhardness characteristics of HCPs.
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Details
- Title
- Statistical Characteristics of Microhardness of Hardened Cement Paste
- Creators
- 党玉栋Yudong Dang - Yunnan Key Laboratory of Building Structure and New Materials Kunming 650223 ChinaXianming Shi - 0000 0001 2157 6568 grid.30064.31 Department of Civil and Environmental Engineering Washington State University PO Box 642910 Pullman WA 99164-2910 USAJueshi Qian - 0000 0001 0154 0904 grid.190737.b College of Materials Science and Engineering Chongqing University Chongqing 400045 ChinaYan Jiang - 0000000123704535 grid.24516.34 School of Materials Science and Engineering Tongji University Shanghai 201804 ChinaXincheng Li - Yunnan Key Laboratory of Building Structure and New Materials Kunming 650223 China
- Publication Details
- Journal of Wuhan University of Technology. Materials science edition, Vol.33(4), pp.924-931
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- Wuhan University of Technology
- Identifiers
- 99900612856601842
- Language
- English
- Resource Type
- Journal article