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Durability assessment of corrosion affected underground concrete pipes

Durability assessment of corrosion affected underground concrete pipes

Mahmoodian, Mojtaba and Li, Chun Qing (2012) Durability assessment of corrosion affected underground concrete pipes. In: International Congress on Durability of Concrete, 18‐21 Jun 2012, Trondheim, Norway.

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Corrosion of concrete is one of the major durability problems in underground concrete sewers. Priority for rehabilitation attention should be given to those sewer pipes that are likely to present the greatest risk of failure than to those of lower risk. To optimize the cost of repair, rehabilitation and replacing of concrete sewers, it is necessary to have a precise understanding of the corrosion mechanism and to have the capability to model the process as realistically as possible. In this study a stochastic model is presented to describe the sulphide corrosion. To investigate the importance of different input variables, a comprehensive sensitivity analysis is also presented. The sensitivity analysis showed that among six random variables, sulphide concentration, relative depth of the flow and acid-consuming capability of concrete have the most effect on corrosion rate and probability of failure.

The methodology used in this paper can be used as a tool for infrastructure managers in durability assessment of existing concrete structures to predict service life and to evaluate reliability of the sewers . It also helps decision makers to choose better strategies to deal with variables which have more effect on the deterioration rate in the system.

Item Type: Conference or Conference Paper (Paper)
Additional Information: [1] This paper was first presented at the International Congress on Durability of Concrete (ICDC 2012) held from 18-21 June 2012 in Trondheim, Norway. It was given on 18 June 2012 within Parallel Session B: Treatment of existing concrete structures and Methodology of testing durability, Session B2: Treatment of existing concrete structures - CP and Repair.
Uncontrolled Keywords: durability assessment, concrete pipes, reliability analysis, life time prediction, sulfide corrosion
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TD Environmental technology. Sanitary engineering
Pre-2014 Departments: School of Engineering
School of Engineering > Department of Civil Engineering
Related URLs:
Last Modified: 14 Oct 2016 09:27
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
Selected for REF2021: None

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