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Condition evaluation of asbestos cement water mains
; Chowdhury, Rudaba
; Hu, Yafei
Construction; National Research Council Canada
American Society of Civil Engineering (ASCE) Pipeline 2012 Conference, August 19-22, 2012, Miami, Florida, U.S.A.
Asbestos cement (AC) water main; pipe deterioration; lime leaching; sulfate reaction; acid attack; carbonation; biodeterioration
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.