par Lacante, Maïté 
;Delsaute, Brice ;Aggelis, Dimitrios G.;Staquet, Stéphanie
Référence Developments in the Built Environment, 26, page (17), 100925
Publication Publié, 2026-04-10
;Delsaute, Brice ;Aggelis, Dimitrios G.;Staquet, Stéphanie Référence Developments in the Built Environment, 26, page (17), 100925
Publication Publié, 2026-04-10
Article révisé par les pairs
| Résumé : | Alkali-activated materials have become of interest as potential solution to reduce CO2 emissions of theconstruction sector. Because these materials are prone to shrinkage and cracking, this study investigates thevolume changes and acoustic emission of slag activated by sodium hydroxide. At early-age, investigationsrevealed higher shrinkage and acoustic emission with high-intensity periods, as the solution concentration wasincreased for a 0.5 solution-to-binder. The E-modulus was calculated based on the ultrasonic pulse velocity(UPV) measurements and the cracking potential was evaluated. The more the composition was prone tocracking, the higher the accumulated acoustic emission. The strains might result in localized stress builduphigher than the material’s tensile strength, potentially resulting in micro-cracking. Long-term autogenous strainresults revealed a separation into groups based on the solution concentration. Later-age thermal expansioncoefficient (CTE) revealed significantly decreased results compared to early-age, indicating the importance ofearly-age CTE determination for the cracking risk assessment. |
