Study on Post-Peak Behavior of Concrete Deteriorated by ASR Subjected to Uniaxial Compression

This research investigates the mechanical properties of concrete deteriorated by alkali-silica reaction (ASR). In contrast to the compressive strength and modulus of elasticity that are usually studied, this study mainly examines detailed fracture properties in the post-peak region beyond peak load aiming to discern the effect on post-peak behavior due to ASR-induced deterioration. Rectangular concrete specimens were subjected to a monotonic uniaxial compression test, and the study evaluated terms of different types and sizes of reactive aggregates and the effect of the Teflon sheet. Digital image correlation was also utilized to investigate the strain distribution and make the compressive fracture region clear, enabling the assessment of the fracture energy of ASR-degraded concrete. The results demonstrate that the stress-strain curve of post-peak stage of ASR-degraded concrete is influenced by the occurrence of cracks.