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Reuse of drinking water treatment sludge in mortar as substitutions of both fly ash and sand based on two treatment methods

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dc.contributor.authorLi, D.
dc.contributor.authorZhuge, Y.
dc.contributor.authorLiu, Y.
dc.contributor.authorPham, P.N.
dc.contributor.authorZhang, C.
dc.contributor.authorDuan, W.
dc.contributor.authorMa, X.
dc.date.issued2021
dc.description.abstractIn this paper, attempts were made to employ both heat-treated and sodium hydroxide (NaOH) treated drinking water treatment sludge (DWTS) as replacement of both fly ash and silica sand at varied substitution ratios in mortar mixes. For fly ash replacement, the heat treatment method results in improved compressive strength with up to 15% replacement ratio and the NaOH treatment method results in higher compressive strength with substitution ratios of up to 10% compared with reference samples. For sand replacement, the replacement ratio associated with improved mortar compressive strength is limited to 5% by weight for both treatment methods, however, heat-treated DWTS mixes showed higher strength than NaOH-treated mixes at the same substitution ratios. Cementing efficiency factor (CEF) for fly ash replacement mixes were analysed and results showed higher CEF with increased DWTS substitution ratio. Considering both the compressive strength and the micro-structural analysis results, treatment of DWTS subjected to evaluated temperature produced better performance mortar than that of NaOH treated method.
dc.identifier.citationConstruction and Building Materials, 2021; 277(article no. 122330):1-11
dc.identifier.doi10.1016/j.conbuildmat.2021.122330
dc.identifier.issn0950-0618
dc.identifier.issn1879-0526
dc.identifier.orcidZhuge, Y. [0000-0003-1620-6743]
dc.identifier.urihttps://hdl.handle.net/11541.2/146029
dc.language.isoen
dc.publisherElsevier
dc.rightsCopyright 2021 Elsevier Access Condition Notes: Accepted manuscript available after 1 April 2023.
dc.source.urihttps://doi.org/10.1016/j.conbuildmat.2021.122330
dc.subjectdrinking water treatment sludge (DWTS)
dc.subjecttreatment methods
dc.subjectheat-treatment
dc.subjectNaOH-treatment
dc.subjectcementing efficiency factor (CEF)
dc.titleReuse of drinking water treatment sludge in mortar as substitutions of both fly ash and sand based on two treatment methods
dc.typeJournal article
pubs.publication-statusPublished
ror.fileinfo12213178560001831 13213178550001831 coversheet Sludge Mortar paper draft-revision no highlight.pdf
ror.mmsid9916484112001831

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