Impact of stresses and restraints on ASR expansion

• Published in: Construction & building materials Vol. 140; pp. 58 - 74
• Main Authors: Morenon, Pierre, Multon, Stéphane, Sellier, Alain, Grimal, Etienne, Hamon, François, Bourdarot, Eric
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.06.2017; Elsevier
• Subjects: Alkali-silica reaction; Anisotropy; Civil Engineering; Concrete modelling; Damage; Engineering Sciences; Stresses effects; Concrete modelling; Damage; Anisotropy; Alkali-silica reaction; Stresses effects; concrete; damage; stress effect; reinforced concrete; anisotropy; Alkali-Silica Reaction; creep; modelling
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2017.02.067

•Impact of applied stresses and restraints on ASR-expansion are compared.•Cracking anisotropy is induced by equilibrium between stress and ASR-gel pressure.•The model is validated for multi-axial loading and restraint.•Tests analyse the model response for multi-axial compression, unloading and tension.•Reinforcement induces concrete prestress and anisotropic cracking. Some large civil engineering structures, principally certain concrete dams, are subject to the structural effects of Alkali-silica reaction (ASR). Due to the directions of loading and reinforcement, the stress state is mostly anisotropic. The aim of this paper is to describe the impact of applied stresses and restraint due to reinforcement or boundary conditions on ASR-expansion and induced anisotropic cracking. After the definition and validation of the poromechanical modelling, the paper gives a detailed description of the effects of different aspects of stress (in one, two or three directions) and reinforcement on ASR-expansion for engineers in charge of damaged structures.