Contribution of Cement Mortar Lining to Structural Capacity of Cast Iron Water Mains

Robert, Dilan; Jiang, Rui Juan; Rajeev, Pathmanathan; Kodikara, Jayantha

doi:10.14359/51688702

Cited by 6 publications

(3 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the same time, Fe 2+ was also converted into ferrihydrite (eqn (6)). Due to the metastable property of ferrihydrite, it has usually been seen as a precursor of a-FeOOH 48 (eqn (7)). Ferrihydrite !…”

Section: Micro Analysis Of Corrosion Productsmentioning

confidence: 99%

“…It acts as a physical barrier between the water ow and iron pipeline, and thus effectively reduces corrosion. 6,7 In actual operation, cement mortar was gradually dissolved by water erosion or peeled off by external damage during installation and use, which was one of the important reasons for the lining failure and iron corrosion. 8,9 As the degree of corrosion developed, the secondary pollution problem caused by the dissolution of the lining and iron corrosion of the reclaimed water pipe network oen occurred.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines

et al. 2020

View full text Add to dashboard Cite

show abstract

Section: Micro Analysis Of Corrosion Productsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Under field conditions, when corrosion has progressed sufficinetly, a first crack may occur which could lead to lekage if the crack is large enough and the cement lining (if any) would get cracked as well. It should be noted that if the cast iron can get cracked then it is most likely that cement lining would get cracked too, since the failure strain of cast iron is typically 4000 to 7000 microstrains whereas that of cement lining is typically around 200 microstrains [23]. Subsquent crack growth with predominantly pressure cycling (i.e., transient pressure events in the network) will be subcrtical until the critical length is reached for spontaneous crack growth casuing a major burst.…”

Section: Leak and Burst Pressuresmentioning

confidence: 99%

Numerical interpretation of pressurized corroded cast iron pipe tests

Zhang

Rathnayaka

Shannon

et al. 2017

International Journal of Mechanical Sciences

View full text Add to dashboard Cite

Pitting/patch corrosion is a major and common cause of leaks and (or) bursts in cast iron (CI) pipes that consist of over 50% of global pipelines. The determination of the remaining life of a CI pipe is a major challenge facing water utilities requiring an estimate of the impact of pitting corrosion on the degradation of structural pipe capacity. This paper uses an efficient finite element analysis (FEA) to model the behaviour of large diameter CI pipes with natural or simulated corrosion pits and patches. The test results were obtained through laboratory pressure testing. Laser scanning was used to develop three dimensional geometric models of pipe specimens for direct use in the numerical modelling. The CI material was simulated by a non-linear hyperbolic elastic model (termed MHM-CI) recently developed by the authors for CI pipe modelling. The numerical results showed that the proposed FEAs with the MHM-CI model are reasonably capable to predict the measured responses with increasing water pressure, importantly at the critical pipe corrosion patches, such as hoop strains, initiation of leak and burst failures. The initiation of fracture was explained by material failure purely by tension, which can form a crack that could lead to water leakage. Final burst possibility was modelled by using a simplified fracture mechanics approach to determine the critical crack length for spontaneous fast fracture as in a burst. Our numerical findings suggest that the proposed simplified numerical approach may be used to determine whether a corroded cast iron pipe would leak before break provided that the corrosion condition of the pipe and the relevant material properties are available. However, the window of time for leak before break would require further testing since this would be governed by sub critical fracture growth subject to repetitive external and internal pipe loadings.

show abstract

Stability assessment of CIPP liner under varied boundary conditions: A theoretical and simulation study

Zhao,

Ma,

Chen

et al. 2024

Results in Engineering

View full text Add to dashboard Cite

Contribution of Cement Mortar Lining to Structural Capacity of Cast Iron Water Mains

Cited by 6 publications

References 17 publications

Corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines

Corrosion behavior and mechanism of ductile iron with different degrees of deterioration of cement mortar lining in reclaimed water pipelines

Numerical interpretation of pressurized corroded cast iron pipe tests

Stability assessment of CIPP liner under varied boundary conditions: A theoretical and simulation study

Contact Info

Product

Resources

About