Expansions with different origins in a concrete dam with bridge over spillway
journal contributionposted on 20.03.2018, 12:04 by Ana Blanco-AlvarezAna Blanco-Alvarez, Sergio Pialarissi-CavalaroSergio Pialarissi-Cavalaro, Ignacio Segura, Luis Segura-Castillo, Antonio Aguado
Concrete dams with expansions from different origins are rare and scarcely documented in the literature, therefore their study gains special interest. This study presents the case of a 62-year-old concrete dam with signs of deterioration due to expansive reactions. Several tests performed on the samples extracted from the dam such as X-ray diffraction, scanning electron microscope with energy dispersive spectroscopy mode and petrography suggest that the expansions are due to a delayed ettringite formation and a subsequent alkali-silica reaction. Thermal and mechanical models developed in the study support this diagnosis.
The authors acknowledge the economic support provided by the Spanish Ministry of Science and Innovation – Spain through the project BIA2013-49106-C2-1-R and the collaboration project with Universidad de la Republica (Uruguay).
- Architecture, Building and Civil Engineering