Micro-cantilever testing on the short-term creep behaviour of cement paste at micro-scale

Journal article (2020)

Authors

Y. Gan Materials and Environment - CEG
Matthieu Vandamme Institut Pierre Simon Laplace
Hongzhi Zhang Shandong University
Y. Chen Materials and Environment - CEG
E. Schlangen Materials and Environment - CEG
K. van Breugel Materials and Environment - CEG
B. Šavija Materials and Environment - CEG
Research Group
Materials and Environment (CEG) (TU Delft)
Copyright: © 2020 Y. Gan, Matthieu Vandamme, Hongzhi Zhang, Y. Chen, E. Schlangen, K. van Breugel, B. Šavija
DOI
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https://doi.org/10.1016/j.cemconres.2020.106105
Creep Cement paste Nanoindenter Miniaturized cantilever beam
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Published Date

2020

Language

English

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Faculty

Civil Engineering & Geosciences

Department

Materials- Mechanics- Management & Design

Research Group

Materials and Environment

Abstract

This study proposes an experimental method for studying the short-term creep behaviour of cement paste at micro-scale. The micro-bending tests on miniaturized cantilever beams were used to characterize the viscoelastic properties of cement paste. The effects of w/b ratio, the type of binder and the stress level on the microscopic creep behaviour were investigated. It is found that the short-term creep of cement paste at microscale can be satisfactorily described by a power-law function. A linear viscoelastic behaviour has been observed in different cementitious systems at the microscale with the stress level up to 67.9%. When compared with the creep results in microindentation tests and conventional macroscopic tests, the obtained creep compliance function in this study is found to be both qualitatively and quantitatively representative of the macroscopic results. This experimental study underlines the importance of microstructural effect on the creep behaviours of cementitious materials at microscale.