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Micromachines 2018, 9(12), 630;

Static and Fatigue Tests on Cementitious Cantilever Beams Using Nanoindenter

Microlab, Faculty of Civil Engineering and Geosciences, Delft University of Technology, 2628 CN Delft, The Netherlands
Author to whom correspondence should be addressed.
Received: 2 November 2018 / Revised: 15 November 2018 / Accepted: 22 November 2018 / Published: 28 November 2018
(This article belongs to the Special Issue Small Scale Deformation using Advanced Nanoindentation Techniques)
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Cement paste is the main binding component in concrete and thus its fundamental properties are of great significance for understanding the fracture behaviour as well as the ageing process of concrete. One major aim of this paper is to characterize the micromechanical properties of cement paste with the aid of a nanoindenter. Besides, this paper also presents a preliminary study on the fatigue behaviour of cement paste at the micrometer level. Miniaturized cantilever beams made of cement paste with different water/cement ratios were statically and cyclically loaded. The micromechanical properties of cement paste were determined based on the measured load-displacement curves. The evolution of fatigue damage was evaluated in terms of the residual displacement, strength, and elastic modulus. The results show that the developed test procedure in this work is able to produce reliable micromechanical properties of cement paste. In addition, little damage was observed in the cantilever beams under the applied stress level of 50% to 70% for 1000 loading cycles. This work may shed some light on studying the fatigue behaviour of concrete in a multiscale manner. View Full-Text
Keywords: cement paste; miniaturized cantilever beam; micromechanics; fatigue; nanoindenter cement paste; miniaturized cantilever beam; micromechanics; fatigue; nanoindenter

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Gan, Y.; Zhang, H.; Šavija, B.; Schlangen, E.; Van Breugel, K. Static and Fatigue Tests on Cementitious Cantilever Beams Using Nanoindenter. Micromachines 2018, 9, 630.

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