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Durability analysis of concrete foundations exposed to external sulfate attacks in the south of Santa Catarina, Brazil

Durability analysis of concrete foundations exposed to external sulfate attacks in the south of... Over the years, the useful life of concrete structures has been increasingly discussed. Chemical effects can occur internally or externally therefore it is important to be cognisant of the mixture of materials that are used and their interactions, as well as the environment in which the structure will be inserted. The objective of this work is to evaluate the durability of concrete foundations that are in contact with soil contaminated with sulfates in an area of coal extraction. With this in mind, tests were carried out on soil and concrete, in the Santa Catarina coal basin where towers for electric power transmission lines are located in an area containing soil with aggressiveness to sulfates. The executed concrete was analysed, and a prediction of its degradation was estimated. According to the prediction, the concrete of some foundations of underground reinforced structures will deteriorate before the end of the minimum service life of 50 years. However, the methodology applied to predict this degradation only considers the diffusion of the aggressive solution. Thus, the models for predicting the service life of cementitious structures with external exposure to sulfates still need to be improved. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Building Pathology and Rehabilitation Springer Journals

Durability analysis of concrete foundations exposed to external sulfate attacks in the south of Santa Catarina, Brazil

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References (30)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022
ISSN
2365-3159
eISSN
2365-3167
DOI
10.1007/s41024-022-00205-x
Publisher site
See Article on Publisher Site

Abstract

Over the years, the useful life of concrete structures has been increasingly discussed. Chemical effects can occur internally or externally therefore it is important to be cognisant of the mixture of materials that are used and their interactions, as well as the environment in which the structure will be inserted. The objective of this work is to evaluate the durability of concrete foundations that are in contact with soil contaminated with sulfates in an area of coal extraction. With this in mind, tests were carried out on soil and concrete, in the Santa Catarina coal basin where towers for electric power transmission lines are located in an area containing soil with aggressiveness to sulfates. The executed concrete was analysed, and a prediction of its degradation was estimated. According to the prediction, the concrete of some foundations of underground reinforced structures will deteriorate before the end of the minimum service life of 50 years. However, the methodology applied to predict this degradation only considers the diffusion of the aggressive solution. Thus, the models for predicting the service life of cementitious structures with external exposure to sulfates still need to be improved.

Journal

Journal of Building Pathology and RehabilitationSpringer Journals

Published: Dec 1, 2022

Keywords: Sulfates; Coal; Soil; Concrete structures; Prediction; Deterioration

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