Modeling of flexural strength degradation induced by alkali-silica reaction. (20th February 2020)

• Record Type: Journal Article
• Authors: Li, Shagang; Deng, Ziming; Li, Chousheng; Chen, Da; Zhang, Yan
• Is Part Of: Construction & building materials. Volume 234(2020)
• Publication Date: 2020-02-20
• Subjects: Alkali-silica reaction (ASR) -- Flexural strength -- Model -- Damage; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2019.117397
• Languages: English
• ISSNs: 0950-0618

Abstract

Highlights: ASR was highly affected by the concentration of NaOH solution. Microporomechanical modeling of ASR induced strength degradation was proposed. The undrained condition was considered for the filling effect of ASR gels. Calculations in undrained condition showed better flexural strength prediction. Abstract: Flexural strength is an important design parameter for concrete structures which is seriously affected by alkali-silica reaction (ASR). Predicting the effect of ASR on flexural strength is relevant. In this paper, a microporomechanical model was proposed to describe the flexural strength degradation induced by ASR. The damage process of ASR was represented by crack propagation in this model. The undrained condition of cracks was considered for the filling effect of ASR gels. To validate this model, the flexural strength of mortar fully immersed in 5% and 10% NaOH solutions was tested. The calculations showed good agreement with the experimental results.