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Improved strength and reduced permeability of stabilized peat: Focus on application of kaolin as a pozzolanic additive

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dc.citedby48
dc.contributor.authorWong L.S.en_US
dc.contributor.authorHashim R.en_US
dc.contributor.authorAli F.en_US
dc.contributor.authorid55504782500en_US
dc.contributor.authorid8640798800en_US
dc.contributor.authorid14420764600en_US
dc.date.accessioned2023-12-29T07:44:30Z
dc.date.available2023-12-29T07:44:30Z
dc.date.issued2013
dc.description.abstractThe aim of this work is to demonstrate the application of kaolin as a pozzolanic additive of stabilized peat. In addition to kaolin, Portland composite cement, calcium chloride and silica sand were used as the materials to stabilize the peat. To achieve such aim, test specimens of both untreated and stabilized peats were tested in laboratory in order to evaluate its unconfined compressive strength and rate of permeability. Each test specimen was prepared in such a way that it has to simulate the in situ condition of deep peat stabilization by deep mixing method. It was found that test specimen with 10% partial replacement with kaolin has the highest unconfined compressive strength that exceeds the minimal required unconfined compressive strength of 345 kPa. The test specimen was subjected to 100 kPa initial pressure and cured in water for 7 days. The unconfined compressive strength of the test specimen was discovered to be 33.7 times greater than that of untreated peat specimen. In laboratory permeability tests, the rate of permeability of untreated peat was found to be 6.43 � 106 times higher than that of stabilized peat. Samples of the test specimens were examined using Energy Dispersive X-ray (EDX) and Scanning Electron Microscope (SEM). High peaks of calcium element from the EDX results of stabilized peat specimens imply that the specimens have high calcium composition as a result of cement hydrolysis, and addition of kaolin is believed to induce secondary pozzolanic reaction in which the cementation crystals of mainly calcium silicate hydrate were formed to bind the soil. Based on the observation of SEM of the stabilized peat specimens, it was found that there was a significant pore refinement in the test specimens as a result of the filler effect of silica sand and pozzolanic activity of kaolin. � 2012 Elsevier Ltd. All rights reserved.en_US
dc.description.natureFinalen_US
dc.identifier.doi10.1016/j.conbuildmat.2012.11.065
dc.identifier.epage792
dc.identifier.scopus2-s2.0-84871784599
dc.identifier.spage783
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84871784599&doi=10.1016%2fj.conbuildmat.2012.11.065&partnerID=40&md5=459f578c99dadf7dca625ec57d78bb2a
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/30101
dc.identifier.volume40
dc.pagecount9
dc.relation.ispartofAll Open Access; Green Open Access
dc.sourceScopus
dc.sourcetitleConstruction and Building Materials
dc.subjectKaolin
dc.subjectPeat
dc.subjectPortland composite cement
dc.subjectSilica sand
dc.subjectCalcium chloride
dc.subjectCompressive strength
dc.subjectKaolin
dc.subjectScanning electron microscopy
dc.subjectSilica sand
dc.subjectSilicate minerals
dc.subjectSoil cement
dc.subjectTesting
dc.subjectAdditives
dc.subjectCalcium
dc.subjectCalcium silicate
dc.subjectHydrates
dc.subjectKaolin
dc.subjectPeat
dc.subjectScanning electron microscopy
dc.subjectSilica
dc.subjectSilica sand
dc.subjectSilicate minerals
dc.subjectSoil cement
dc.subjectCalcium silicate hydrate
dc.subjectComposite cements
dc.subjectDeep mixing method
dc.subjectEnergy dispersive x-ray
dc.subjectFiller effects
dc.subjectInitial pressure
dc.subjectPartial replacement
dc.subjectPermeability test
dc.subjectPozzolanic activity
dc.subjectPozzolanic additives
dc.subjectReduced permeabilities
dc.subjectSecondary pozzolanic reaction
dc.subjectSitu conditions
dc.subjectTest specimens
dc.subjectUnconfined compressive strength
dc.subjectCalcium silicate hydrate
dc.subjectComposite cements
dc.subjectEnergy dispersive x-ray
dc.subjectPozzolanic activity
dc.subjectPozzolanic additives
dc.subjectReduced permeabilities
dc.subjectSecondary pozzolanic reaction
dc.subjectUnconfined compressive strength
dc.subjectPeat
dc.subjectCompressive strength
dc.titleImproved strength and reduced permeability of stabilized peat: Focus on application of kaolin as a pozzolanic additiveen_US
dc.typeArticleen_US
dspace.entity.typePublication
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