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Constitutive model for aging thermoviscoelasticity of reacting concrete I: theoretical formulation

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Abstract

Recent experiments on concrete have established that ongoing chemical reactions cause creep-like mechanical behaviour. Earlier, the present authors have proposed a Dissolution-Precipitation Mechanism and Theory capable of predicting such chemo-mechanical response. However, this theory is incapable of predicting observed aging basic creep of concrete in absence of reactions. For this purpose, another physical mechanism—Modified Adaptive Link Mechanism—has been proposed in this Paper. Two expressions for the material viscosity tensor and a unified constitutive equation for the aging thermochemoviscoelasticity of concrete have been derived. Ambient temperature has been assumed to affect the pace of reactions and of the bond breakage and restoration process. In this Part I of this Paper, theoretical foundations of the proposed constitutive model have been presented. The theoretical significance of the work done has been discussed. In Part II of the paper, the empirical validation and practical relevance of the proposed constitutive model have been presented.

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Suter, M., Benipal, G.S. Constitutive model for aging thermoviscoelasticity of reacting concrete I: theoretical formulation. Mech Time-Depend Mater 14, 277–290 (2010). https://doi.org/10.1007/s11043-010-9106-9

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