Geoenvironmental aspects of coal refuse-fly ash blends

dc.contributor.authorAlbuquerque, Allwyn J.en
dc.contributor.committeechairDaniels, W. Leeen
dc.contributor.committeecochairNovak, John T.en
dc.contributor.committeememberBrandon, Thomas L.en
dc.contributor.committeememberLuttrell, Gerald H.en
dc.contributor.departmentEnvironmental Engineeringen
dc.date.accessioned2014-03-14T21:50:55Zen
dc.date.adate2009-12-04en
dc.date.available2014-03-14T21:50:55Zen
dc.date.issued1994-10-11en
dc.date.rdate2009-12-04en
dc.date.sdate2009-12-04en
dc.description.abstractThe separate land disposal of coal refuse and fly ash presents difficulties throughout the Appalachian region, both in terms of disposal costs per acre and in terms of its potential environmental impacts on soil, ground water, revegetation, and slope stability. The purpose of this study was to determine how fly ash addition to coal refuse would impact on certain geotechnical properties of the refuse disposal piles, and whether the refuse-fly ash blends would be suitable as co-disposed materials. Accordingly, the compaction, permeability and shear strength characteristics of the refuse-fly ash blends were experimentally determined for varying fly ash percentages. The compaction test results indicated that, with increasing fly ash, the maximum dry density of these blends marginally decreased. The permeability test results showed that the permeability of the test specimens progressively decreased with the increase in fly ash. The shear strength results demonstrated that the addition of fly ash did not significantly influence the shear strength of the refuse. The critical factor of safety determined during slope stability analysis revealed that the tested slope geometries were stable for long term, drained conditions (using the STABGM computer program). The volume change analysis determined that there was a minimal expansion in the volume of refuse when it was blended with fly ash. However, it may be noted that all the stated results depend on a number offactors, including the nature of the refuse and fly ash used. Therefore, these findings would be specific to bulk blends of coal refuse and fly ash only. In general, this study indicates that fly ash can be beneficially reused with respect to the geotechnical properties evaluated. Co-disposal of fly ash and coal refuse may be a reasonable alternative to present disposal methods.en
dc.description.degreeMaster of Scienceen
dc.format.extentviii, 133 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-12042009-020142en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-12042009-020142/en
dc.identifier.urihttp://hdl.handle.net/10919/46095en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1994.A4387.pdfen
dc.relation.isformatofOCLC# 32191361en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1994.A4387en
dc.subject.lcshCoal mine wasteen
dc.subject.lcshFly ashen
dc.subject.lcshRefuse and refuse disposalen
dc.titleGeoenvironmental aspects of coal refuse-fly ash blendsen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineEnvironmental Planningen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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