Sulphate attack on asbestos cement pipes

Matti, M.A.; Al‐Adeeb, Abdulqader

doi:10.1016/0262-5075(85)90004-1

Cited by 11 publications

(6 citation statements)

References 4 publications

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“…Asbestos cement pipes failures occur in two ways, circumferential failure due mechanical loading, and longitudinal failures which occur as a result of material corrosion [10].The longitudinal failures occur in 80% of burst field pipes [11]. Mechanical failure is generally a result of poor trench conditions and locating of the pipe (i.e.…”

Section: Failure Of Asbestos Cement Pipesmentioning

confidence: 99%

Prediction of Asbestos Cement Water Pipe Aging and Pipe Prioritization Using Monte Carlo Simulation

Punurai¹,

Davis²

2017

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For buried Asbestos cement (AC) pipes in service, internal and external surface degradation occur by dissolution or leaching of cement-based components leading to loss of pipe strength. Since water quality and soil environment cannot be completely specified along a pipeline, a management methodology for AC water pipelines is required to estimate the probability of pipe failure as ageing proceeds. The paper describes the technique and its application to experimental data, which illustrates in three parts. First, the degradation rates in AC pipes are computed from 360 aggregated independent pipe segments residual strength test data taken from different pipe diameter sizes used in various water utilities locations in Thailand. Second, the predictions of service lifetime for AC pipes are estimated using Monte Carlo simulation in conjunction with the physical failure state formulations. Output from the simulation provides a number of failures recorded over time, which then allows the economic analysis for optimal pipe replacement scheduling. All is described in the third part. The end results can be used for water utilities to allocate government funds for future pipe maintenance activities.

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Section: Failure Of Asbestos Cement Pipesmentioning

confidence: 99%

Prediction of Asbestos Cement Water Pipe Aging and Pipe Prioritization Using Monte Carlo Simulation

Punurai¹,

Davis²

2017

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“…• Sulphate attack: Sulphate contained in the conveyed water and in the soil pore water (groundwater) can also react with hydrated calcium aluminate or monosulphate to form calcium sulphoaluminate (ettringite) (Matti and Al-Adeebt, 1985). According to Matti and Al-Adeebt (1985), gypsum and ettringite formed by these reactions occupy considerably more volume (123 to 224%) than the original solids they replace.…”

Section: Introductionmentioning

confidence: 99%

“…According to Matti and Al-Adeebt (1985), gypsum and ettringite formed by these reactions occupy considerably more volume (123 to 224%) than the original solids they replace. The formation of these compounds causes swelling, which can ultimately lead to the expansion and destruction of the cementitious portion of AC pipe.…”

Section: Introductionmentioning

confidence: 99%

Condition Assessment Methods for AC Pipe and Current Practices

Hu¹,

Wang²,

Chowdhury³

2010

Pipelines 2010

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The material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. Pour obtenir de plus amples renseignements : http://lois.justice.gc.ca/fr/showtdm/cs/C-42 Condition Assessment Methods for AC Pipe and Current Practices

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“…Sulphate attack: Sulphate in conveyed water and in soil pore water (groundwater) can also react with free lime and hydrated calcium aluminates to form calcium sulphate (gypsum) and calcium sulphoaluminate (ettringite) (Matti and Al-Adeebt, 1985). According to Matti and Al-Adeebt (1985), gypsum and ettringite formed by these reactions occupy considerably more volume (123 to 224%) than the original solids they replace.…”

mentioning

confidence: 99%

“…According to Matti and Al-Adeebt (1985), gypsum and ettringite formed by these reactions occupy considerably more volume (123 to 224%) than the original solids they replace. The formation of these compounds causes swelling, which can ultimately lead to the cracking and destruction of the cementitious portion of AC pipe.…”

mentioning

confidence: 99%

Condition Evaluation of Asbestos Cement Water Mains

Chowdhury¹,

Hu²,

Wang³

2012

Pipelines 2012

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2012, pp. 288-297, 2012-08-22 Condition evaluation of asbestos cement water mains Chowdhury, Rudaba; Hu, Yafei; Wang, Dunling Abstract: This paper focuses on the condition evaluation of asbestos cement (AC) pipe samples from three utilities located in different geographic regions and climatic zones in the USA and Canada. Various means of examination or testing were used to evaluate the condition of the samples. These included visual inspection, hardness testing, phenolphthalein testing, crush testing, and scanning electron microscopy with energy dispersive spectroscopy (SEM/EDS). Climate and soil information was also collected for the areas where the three utilities are located to assess the external environments facing the AC pipes. The condition evaluation results were correlated with the external soil characteristics and internal water quality data, collected through a survey, to identify factors contributing to the deterioration of the AC pipes belonging to these utilities. The paper also discusses the variation in the deterioration of the AC water mains from the three utilities.

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Sulphate attack on asbestos cement pipes

Cited by 11 publications

References 4 publications

Prediction of Asbestos Cement Water Pipe Aging and Pipe Prioritization Using Monte Carlo Simulation

Prediction of Asbestos Cement Water Pipe Aging and Pipe Prioritization Using Monte Carlo Simulation

Condition Assessment Methods for AC Pipe and Current Practices

Condition Evaluation of Asbestos Cement Water Mains

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