Modelling concrete deterioration in sewers using theory and field observations

Title: Modelling concrete deterioration in sewers using theory and field observations
Creator: Wells, T.; Melchers, R. E.
Relation: ARC.LP0882016 http://purl.org/au-research/grants/arc/LP0882016
Relation: Cement and Concrete Research Vol. 77, November 2015, p. 82-96
Publisher Link: http://dx.doi.org/10.1016/j.cemconres.2015.07.003
Publisher: Elsevier
Resource Type: journal article
Date: 2015
Description: Samples of new and 70 year old pre-corroded OPC concrete were exposed for up to 48 months in 6 sewers throughout Australia. Corrosion losses at each site followed the bi-linear trend originally proposed by Wells and Melchers [1]. During an initial phase (lasting < 2 years) negligible loss of material occurs however once the surface pH = 6 losses commence and accumulate linearly at a rate that is likely to remain constant over time. Corrosion rates were found to be sensitive to humidity but insensitive to concrete alkalinity. A first pass model which predicts the rate of concrete sewer pipe corrosion from a knowledge of local average sewer gas temperature, humidity and H₂S concentrations was also developed. The equation predictions were in good agreement with rates determined from field observation and historical data.
Subject: reaction (A); corrosion (C); concrete (E); modelling (E)
Identifier: http://hdl.handle.net/1959.13/1330674
Identifier: uon:26446
Identifier: ISSN:0008-8846
Language: eng
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