Case Study of the Performance of Prestressed Concrete Cylinder Pipes in Northeastern Morocco

Hassi, Sara; Touhami, M. Ebn; Menu, Bruce; Benqlilou, H.; Ejbouh, Aadil

doi:10.1061/(asce)ps.1949-1204.0000636

Cited by 4 publications

(6 citation statements)

References 11 publications

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Section: Introductionmentioning

confidence: 99%

“…The reader can refer to Hassi et al. [ 5,7,8 ] for detailed results. The reader must also keep in mind that these mortars as linings are also typically used for renovation of old pipes in the region.…”

Section: Introductionmentioning

confidence: 99%

“…[6] Some PCCP failures can occur prematurely. The reader can refer to Hassi et al [5,7,8] for further information on the premature failures of PCCP pipelines in North Africa. These pipelines are typically critical to utilities, so unexpected service interruptions caused by pipeline failures place a significant burden on the utility and may result in the utility being unable to meet the needs of its customers.…”

Section: Introductionmentioning

confidence: 99%

“…[2] Some PCCP failures have also been linked to the deterioration of the mortar coating sprayed around the prestressing wires due to the aggressive nature of the soil surrounding the pipes. [3,5,8,12] This puts ground water and oxygen in direct contact with the prestressing wires and/or the steel cylinder and leads to their corrosion and subsequent failure. [3] Thus, improving the performance the cement mortar is particularly important for water utilities.…”

Section: Introductionmentioning

confidence: 99%

“…[1,2] In general, PCCP has proved to be one of the most durable pipeline materials with many advantages, such as its high resistance to large inner pressure and external loading, and its simple installation and construction process. [3][4][5] However, as PCCP nears the end of its useful life, more failures occur. [6] Some PCCP failures can occur prematurely.…”

Section: Introductionmentioning

confidence: 99%

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Investigating the possibility of PCCP mortar coating leaching and the impact on drinking water quality

Hassi

Menu²,

Javanmardi

et al. 2023

CLEAN Soil Air Water

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The objective of this article was to investigate the potential for the dissolution and leaching of certain chemical elements from the protective mortar coatings of prestressed concrete cylinder pipe (PCCP) into drinking water in the event of leakage and how this might affect the overall quality of the water delivered to consumers. The mortars as linings are also typically used for renovation of old pipes. Samples from three frequently used mortar coating mixtures underwent immersion in water after 28 days of curing and were monitored for 430 days. The water was tested for pH levels and the presence of aluminum, chromium, lead, and iron, in accordance with the standards set for human consumption in Moroccan and other countries such as Australia, Canada, and the United States, as well as organizations such as the European Union and World Health Organization. The results indicate that the highest levels of aluminum, iron, chromium, and lead leaching occurred after the initial contact with water, gradually declining over time. Furthermore, the inclusion of silica fume and fly ash in the coating increases the potential for chemical element leaching. Additionally, preinstallation pipeline washing demonstrates its effectiveness in reducing the leaching of chemical elements into drinking water in the event of leakages. The overall results suggest that the likelihood of contamination of drinking water by leaching of chemical elements from the mortar coating in case of a leakage appears to be negligible under the studied conditions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%