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 was published in the journal Construction and Building Materials and the definitive published version is available at https://doi.org/10.1016/j.conbuildmat.2017.12.161.
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).