Determination of Asbestos–Cement Pipe Deterioration Rate Using Accelerated Acid Degradation

Deterioration of asbestos–cement (AC) water pipes was assessed using accelerated acid exposure experiments coupled with measurements of physical and mechanical properties. The experiments were conducted in three phases using a strong acid (nitric acid) at concentrations ranging from 0.00158 to 3.16...

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Bibliographic Details
Published in:Journal - American Water Works Association 2018-06, Vol.110 (6), p.E27-E38
Main Authors: Ghirmay, Abiy M., Wood, Clinton M.
Format: Article
Language:English
Subjects:
Acids
Asbestos
asbestos–cement
Biodegradation
Calcium
Capacity
Cement
Concrete
Crushing
Deformation
Degradation
Deterioration
Estimation
infrastructure
Magnesium
Mechanical properties
Nitric acid
Nitric acids
Phenolphthalein
pipe deterioration
Pipes
rate of deterioration
Service life
Water pipelines
Water pipes
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Summary:Deterioration of asbestos–cement (AC) water pipes was assessed using accelerated acid exposure experiments coupled with measurements of physical and mechanical properties. The experiments were conducted in three phases using a strong acid (nitric acid) at concentrations ranging from 0.00158 to 3.16 M. The AC pipe deterioration was determined using phenolphthalein staining and the measurement of calcium and magnesium. Results from the experiment indicate that a linear rate of deterioration with time is the most appropriate for estimating the rate of deterioration in the field and for estimating the remaining service life of the AC pipe. In addition, the use of high‐concentration acids to understand the strength loss of AC pipes in the field was evaluated by comparing the crushing and hydrostatic capacity of a full‐scale acid‐degraded specimen and a naturally degraded specimen. Similar loss of crushing and hydrostatic capacity with increasing deterioration was observed between the acid‐degraded and naturally degraded specimen.
ISSN:0003-150X
1551-8833
DOI:10.1002/awwa.1041