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Article Dans Une Revue Cement and Concrete Research Année : 2014

Long-term creep properties of cementitious materials: Comparing microindentation testing with macroscopic uniaxial compressive testing

Résumé

This study is dedicated to comparing minutes-long microindentation creep experiments on cement paste with years-long macroscopic creep experiments on concrete and months-long macroscopic creep experiments on cement paste. For all experiments, after a transient period the creep function was well captured by a logarithmic function of time, the amplitude of which is governed by a so-called creep modulus. The non-logarithmic transient periods lasted for days at the macroscopic scale, but only for seconds at the scale of microindentation. The creep moduli (which thus govern the rate of the long-term logarithmic creep) of concrete samples were estimated from microindentations performed at the scale of cement pastes in combination with micro-mechanical models. Those estimates were proportional to the creep moduli measured on concrete samples by regular macroscopic uniaxial testing, thus proving that minutes-long microindentation can provide a measurement of the long-term creep properties of cementitious materials.
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Dates et versions

hal-00955330 , version 1 (17-03-2020)

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Qing Zhang, Robert Le Roy, Matthieu Vandamme, Bruno Zuber. Long-term creep properties of cementitious materials: Comparing microindentation testing with macroscopic uniaxial compressive testing. Cement and Concrete Research, 2014, 58, pp.89-98. ⟨10.1016/j.cemconres.2014.01.004⟩. ⟨hal-00955330⟩
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