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Article Dans Une Revue Cement and Concrete Research Année : 2017

Non-linear modeling of yield stress increase due to SCC structural build-up at rest

Résumé

It is commonly considered that the yield stress of SCC increases linearly at rest. This increase is due to the SCC structural build-up. This behavior can be explained by the cement particle nucleation at the contact points. During the first dozens of minutes, the cement particle nucleation induces a linear increase of the yield stress in time. However, recent studies have shown that the trend of the yield stress increase becomes non-linear when considering a longer time (before the setting time). This study aims to provide a theoretical frame to describe this non-linear increase. The proposed model tends toward the linear model during the first dozens of minutes and follows the observed exponential law for a longer resting time. The discrepancy with the linear model is explained by two phenomena an increase in the solid volume fraction and a decrease in the packing fraction due to cement particle nucleation. (C) 2016 Elsevier Ltd. All rights reserved.

Domaines

Matériaux
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Dates et versions

hal-02008163 , version 1 (05-02-2019)

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  • HAL Id : hal-02008163 , version 1

Citer

Thibaut Lecompte, Arnaud Perrot. Non-linear modeling of yield stress increase due to SCC structural build-up at rest. Cement and Concrete Research, 2017, 92, pp.92-97. ⟨hal-02008163⟩
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