FraMCoS 5 2004 Vail, Colorado, USA

A Coupled Hygro-Chemo-Mechanical Damage Model for ASR-Affected Concrete

The paper presents a hygro-chemo-mechanical model for ASR affected concrete, which is based on concepts of the Theory of Porous Media. Concrete is regarded as a mixture of three main inter- acting constituents: the skeleton, the pore liquid and the…

First page of: A Coupled Hygro-Chemo-Mechanical Damage Model for ASR-Affected Concrete
Year 2004
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Abstract

The paper presents a hygro-chemo-mechanical model for ASR affected concrete, which is based on concepts of the Theory of Porous Media. Concrete is regarded as a mixture of three main inter- acting constituents: the skeleton, the pore liquid and the pore gas. The skeleton in turn represents a binary mixture of the unreacted, unswollen and the already reacted, swollen material. When ASR takes place, mass of the unreacted material is non-instantaneously converted into mass of the reacted material. Since the un- reacted material is characterized by a smaller density, the material swells. The applicability of the model is demonstrated by a numerical simulation of the long-term degradation of an ASR-affected concrete beam subjected to a time-variant hygral loading history.