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Effects of an internal sulfate attack and an alkali-aggregate reaction in a concrete dam.pdf (4.65 MB)

Effects of an internal sulfate attack and an alkali-aggregate reaction in a concrete dam

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journal contribution
posted on 2018-03-20, 11:49 authored by Andre Campos, Carlos M. Lopez, Ana Blanco-AlvarezAna Blanco-Alvarez, Antonio Aguado
The alkali-aggregate reaction and the internal sulfate attack are two chemical reactions that lead to expansions in concrete structures. The former is one of the main causes of expansions in concrete dams and has been extensively reported in the literature, whereas the latter is less common and, thus, less studied. The confluence of both reactions in one structure is highly unlikely but still possible as shown by the case of the dam studied in this paper. This gravity dam exhibits significantly high non-recoverable displacements that may only be justified by the superposition of both phenomena. This paper focuses on the study of a concrete dam whose diagnosis hypotheses have changed throughout the years according to evolution of the behavior observed. The hypotheses proposed in the study are validated by conducting numerical analyses through 3D and 2D finite element models. The results confirmed the diagnosis proposed and the capability of the model to reproduce the behavior of the dam.

Funding

The authors acknowledge the economic support provided by the Spanish Ministry of Economy and Competitiveness (Spain MEC) through the project BIA2013-49106-C2-1-R. Furthermore, the authors wish to thank Endesa Generacion S.A. for invaluable economical and technical support over the years. The Spanish Ministry of Economy and Competitiveness supported the first author through the scholarship FPU.

History

School

  • Architecture, Building and Civil Engineering

Published in

Construction and Building Materials

Volume

166

Pages

668 - 683

Citation

CAMPOS, A. ... et al, 2018. Effects of an internal sulfate attack and an alkali-aggregate reaction in a concrete dam. Construction and Building Materials, 166, pp.668-683.

Publisher

© Elsevier

Version

  • AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2018

Notes

This paper was accepted for publication in the journal Construction and Building Materials and the definitive published version is available at https://doi.org/10.1016/j.conbuildmat.2018.01.180

ISSN

0950-0618

Language

  • en