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Corrosion Processes in the Concrete of the Dams



Author(s)

Mark A. Sadovich, Tatyana F. Shlyakhtina and Anna M. Kuritsyna

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DOI:10.17265/1934-7359/2013.04.005

Department of Technology, Bratsk State University, Bratsk 665709, Russia

During the whole operation life of Bratsk and Ust-Ilimsk hydroelectric plants, chemical analysis of water filtering through the pressure front of the concrete dams was under systematic monitoring by sampling in places of concentrated outcome in the inspection galleries of a dam. Long-term cumulative observations made up a basis for study of the indicated dams concrete corrosion caused by the Angarawater in the process of its filtration through the cracks formed in the period of the dam erection, through construction joints and other defects. Mathematical-statistical analysis allowed the classification the processes of corrosion from the point of view of their time dynamics and divided them correspondingly into stationary (stable) and non-stationary. On the basis of a calculation of the cement stone component removal along with the ideas of the process dynamics the pressure front filtration development forecast has been made and their danger level has been estimated. The developed conception is of rather a general character and can be used when analyzing the state of concrete dams of theAngaracascade and other similar cases.

Concrete corrosion, concrete endurance, water filtration, filtration seepage, dam, pressure front, leaching, component removal.