硬化水泥净浆微观强度测试与表征

Journal Article (2021)
Author(s)

Zhi Ge (Shandong University)

Nengdong Jiang (Shandong University)

Hongzhi Zhang (Shandong University)

Dongshuai Hou (Qingdao University of Technology)

H.E.J.G. Schlangen (TU Delft - Materials and Environment)

Branko Savija (TU Delft - Materials and Environment)

Research Group
Materials and Environment
DOI related publication
https://doi.org/10.14062/j.issn.0454-5648.20200715
More Info
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Publication Year
2021
Language
Chinese (Traditional)
Research Group
Materials and Environment
Issue number
5
Volume number
49
Pages (from-to)
887-892

Abstract

Micro-cubes of hardened cement paste with the lengths of 100 μm and 200 μm were prepared by micro-dicing and thin-sectioning techniques. The compressive strength and splitting strength of these specimens were measured by a nanoindenter equipped with different types of tips. Considering the heterogeneity nature of the material in a micro-scale, we examined 100 specimens via a statistic analysis. The results show that the two-parameter Weibull distribution can be used to represent the probability distribution of both compressive strength and splitting strength in a micro-scale. The specimens with a higher water-to-binder ratio have a higher strength and a lower variability. Furthermore, the specimen size has an influence on the measured strength. The bigger specimens have lower strength and variability. The reported average value and variability of strengths obtained in this work are greater than those of the concrete in a meso-scale, but lower than those of the hydration product in a nano-scale.

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