The condition of a great part of the drinking water network in the Netherlands is unknown. In order to efficiently identify the assets that are close to their lifetime expectancy, a non-destructive evaluation method was developed based on ultrasonic testing. The water network is composed mostly by polyvinyl chloride (~50%) and cement-based (~30%) pipes. In this work, the degradation due to acidic attack in cement-based drinking water pipes was investigated. Mortar blocks were manufactured and degraded in a hydrochloric acid solution. The amount of degradation was derived by measuring the overall ultrasonic pulse velocity in the specimen. Moreover, two factors played a vital role in the detection of acid induced damage: the high damping of the piezoelectric element, resulting in low resonance and the processing algorithm. A 0.5 MHz central frequency transducer is found to be the most suitable to detect acidic damage in cement-based structures.
[1]
Remko Akkerman,et al.
Ultrasonic measurements of undamaged concrete layer thickness in a deteriorated concrete structure
,
2016
.
[2]
Hamid Sheikhzadeh,et al.
Improving the time-resolution and signal-to-noise ratio of ultrasonic NDE signals
,
2004
.
[3]
Gordon Hayward,et al.
Comparison of some non-adaptive deconvolution techniques for resolution enhancement of ultrasonic data
,
1989
.
[4]
Dunling Wang,et al.
Examination of Asbestos Cement Pipe Deterioration with Scanning Electron Microscopy
,
2011
.
[5]
S.P. Neal,et al.
Flaw signature estimation in ultrasonic nondestructive evaluation using the Wiener filter with limited prior information
,
1993,
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.