Advanced Condition Assessment and Pipe Failure Prediction ProjectAdvanced Condition Assessment and Pipe Failure Prediction Project
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Concrete sewer pipe corrosion – findings from an Australia field study

by Tony Wells, Robert Melchers

Centre for Infrastructure Performance and Reliability, The University of Newcastle, NSW, Australia

Conference:

Ozwater 2016

Date of Conference:

10 – 12 May 2016

Conference Location :

Melbourne, Australia

Abstract

Samples of new and 70 year old pre-corroded OPC concrete were exposed for up to 5 years in sewers throughout Australia. Corrosion losses at each site followed a bi-linear trend. During an initial phase (lasting <3 years) negligible loss of material occurs, however, once the surface reaches pH=6 losses commence and accumulate linearly at a rate that appears to remain constant with time. Two strategies for lowering the rate of corrosion are (i) maintain surface pH>6 and/or (ii) lower the sewer gas humidity. A model developed to predict the rate of corrosion using local environmental conditions is described.

Click here to download the paper

Information about Pipes

In August 2011 international water research organisations, Australian water utilities and three Australian universities came together through a collaborative research agreement, and committed overall funding of $16 million (including $4 million cash) over five years to undertake this research through the Advanced Condition Assessment and Pipe Failure Prediction Project.

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Recent posts

  • The final meeting of the Committee of Management

    December 6, 2016

  • Final Technical Assessment Committee meeting

    November 24, 2016

  • Critical Pipes Project wins B/HERT award

    November 16, 2016

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