BLANCO, A. ... et al, 2018. Expansions with different origins in a concrete dam with bridge over spillway. Construction and Building Materials, 163, pp.861-874.
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.
This paper is closed access until 4 January 2019.
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).