Report on the characterization of ISR reactions: ACES Deliverable 3.1

This report focuses on the analysis and correlation of the coring’s residual expansion with the behaviour of ISR-affected structures from the perspective of potential influencing factors. The restraint effect from the supporting plate appears to be the main reason for the swelling behaviour of specimens on multiple scales. Consitutive equations considering the restraint effect were proposed, which were coupled to a damage model calculating the mechanical and physical properties of the degraded material. The predictions generally reproduced the amplitudes at the final expansion and inflection points in the blocks and confirmed the significant impact of the restraint effect on the swelling behaviour of massive concrete structures.