Creep of a C-S-H gel: a micromechanical approach

Anais da Academia Brasileira de Ciências

Julien Sanahuja²  Luc Dormieux¹ 

[1] ,Lafarge Centre de RechercheSaint-Quentin Fallavier,France

关键词: homogenization;    creep;    cement paste;    C-S-H gel;    homogeneização;    fluência;    pasta de cimento;    C-S-H gel;   

DOI  :  10.1590/S0001-37652010000100004

来源: SciELO

【 摘 要 】

Both clays and calcium silicate hydrates(the main hydration products of Portland cements) exhibit a microstructure made up of lamellar particles. The microscopic mechanism responsible for the macroscopic creep of such materials is often described as the relative sliding of the sheets. This paper proposes a micromechanical approach to estimate the macroscopic creep behavior rising from this microscopic mechanism. The asymptotic evolution of creep at both short- and long-term is especially investigated. More precisely, a non-vanishing initial elastic strain is retrieved. At long-term, a threshold on porosity appears. At lower porosities, the creep evolution admits an asymptotic strain. At higher porosities, it admits an asymptotic strain rate.

【 授权许可】

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