- 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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