Characterizing concrete corrosion below sewer tidal levels at chemically dosed locations

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dc.contributor.authorTaheri, Sen_AU
dc.contributor.authorAms, Men_AU
dc.contributor.authorBustamante, Hen_AU
dc.contributor.authorVorreiter, Len_AU
dc.contributor.authorBevitt, JJen_AU
dc.contributor.authorWithford, Men_AU
dc.contributor.authorClark, SMen_AU
dc.date.accessioned2025-04-04T03:37:57Zen_AU
dc.date.available2025-04-04T03:37:57Zen_AU
dc.date.issued2020-10-15en_AU
dc.date.statistics2024-09-11en_AU
dc.description.abstractUnexplainable concrete softening below the water line has been observed by Sydney Water in their gravity sewer network, some of which is subjected to corrosion control methods using chemical ferrous chloride (FeCl2) dosing of the wastewater. We applied a combination of physical and chemical tools to determine the properties of the top 20 mm of concrete cores recovered from sewer pipes. These techniques consist of neutron tomographic imaging, scanning electron microscopy, hardness mapping, and pH profiling. Concrete cores were collected from roof (crown), tidal (wall) and below flow regions of gravity sewer pipes of Sydney Water's wastewater system from locations that received no treatment as well as locations dosed with FeCl2. All samples showed a degree of softening of the surface exposed to the sewerage with an associated depletion in calcium concentration and reduced pH in the same regions. © 2020 Elsevier Ltd.en_AU
dc.description.sponsorshipThe authors would like to thank Sydney Water - Macquarie University Enterprise Partnership Agreement MQ9201600357 for the financial support. Anthony Lanati, Dr. Liene Spruzeniece, Dr. Timothy D. Murphy, Manal Bebbington, Wendy Tao, Professor Candace Lang, and Carla Raymond from Macquarie University, A. Professor Marjorie Valix, Hee-Chan Jang and William Hadinata Lie from Sydney University and finally VGSTUDIO MAX technicians (Volume Graphics GmbH) are acknowledged for their kind technical support. We acknowledge use of facilities in the Macquarie University GeoAnalytical laboratories and thank staff for their support. This work was performed in-part at the OptoFab node of the Australian National Fabrication Facility, utilizing NCRIS and NSW state government funding.en_AU
dc.format.mediumPrint-Electronicen_AU
dc.identifier.articlenumber116245en_AU
dc.identifier.citationTaheri, S., Ams, M., Bustamante, H., Vorreiter, L., Bevitt, J. J., Withford, M., & Clark, S. M. (2020). Characterizing concrete corrosion below sewer tidal levels at chemically dosed locations. Water Research, 185, 116245. doi:10.1016/j.watres.2020.116245en_AU
dc.identifier.issn0043-1354en_AU
dc.identifier.issn1879-2448en_AU
dc.identifier.journaltitleWater Researchen_AU
dc.identifier.urihttps://doi.org/10.1016/j.watres.2020.116245en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16130en_AU
dc.identifier.volume185en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectCorrosionen_AU
dc.subjectNeutronsen_AU
dc.subjectCalciumen_AU
dc.subjectIronen_AU
dc.subjectConcretesen_AU
dc.subjectGround wateren_AU
dc.subjectChloridesen_AU
dc.subjectPipesen_AU
dc.subjectTomographyen_AU
dc.titleCharacterizing concrete corrosion below sewer tidal levels at chemically dosed locationsen_AU
dc.typeJournal Articleen_AU
dcterms.dateAccepted2020-07-27en_AU
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