Pilot study results of the strength behaviour of aggregate-lime-natural pozzolan mixes

dc.contributor.authorOlekambainei, A.K.E.
dc.contributor.upauthorVisser, Alex T.
dc.date.accessioned2008-05-30T10:46:31Z
dc.date.available2008-05-30T10:46:31Z
dc.date.issued2004-07
dc.descriptionThis paper was transferred from the original CD ROM created for this conference. The material on the CD ROM was published using Adobe Acrobat technology. The original CD ROM was produced by Document Transformation Technologies Postal Address: PO Box 560 Irene 0062 South Africa. Tel.: +27 12 667 2074 Fax: +27 12 667 2766 E-mail: doctech@doctech.co.za URL: http://www.doctech.co.zaen
dc.description.abstractPaper presented at the 23rd Annual Southern African Transport Conference 12 - 15 July 2004 "Getting recognition for the importance of transport", CSIR International Convention Centre, Pretoria, South Africa. Rapid depletion of natural road construction material reserves and strict environmental laws has lead to the use of marginal materials in recent years. In Tanzania the use of natural pozzolans is becoming a technically viable option. The paper determines the influence of moulding moisture content on the strength behaviour of aggregate-lime-natural pozzolan mixes in fresh and hardened states. The paper will determine the influence of the moulding moisture content on California bearing ratio (CBR) and the tensile and compressive strengths of laboratory-cured specimens. In this study, two different mixes were prepared, one each from the individual pozzolans and one control sand-cement mix. The two pozzolans were obtained from separate sources in Tanzania, and were activated using hydrated lime. The fresh strength behaviour was evaluated by CBR test; UCS and Double Punch Tensile tests (DPTT) were done to evaluate the hardened state strength. Unconfined compressive strength and DPTT tests were done after 28, 90 and 180 days of curing under ambient conditions in the laboratory. Two moisture contents were used; optimum and 20 percent above optimum for all mix combinations. A trial mix was prepared using Mbeya pozzolan mix, moulded at 20 percent below optimum to determine the strength behaviour. It was found that the natural pozzolan mixes provide engineering properties comparable with that of cement stabilised materials and are therefore a viable solution. Double punch tensile test method was also found to be a simpler and viable method for the tensile strength determination of lightly cement stabilised materials.en
dc.format.extent220923 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.citationOlekambainei, AKE & Visser, AT 2004, 'Pilot study results of the strength behaviour of aggregate-lime-natural pozzolan mixes' , Paper presented to the 23rd Annual Southern African Transport Conference, South Africa, 12 - 15 July.en
dc.identifier.isbn1920017232
dc.identifier.urihttp://hdl.handle.net/2263/5692
dc.languageeng
dc.language.isoenen
dc.publisherSATCen
dc.relation.ispartofSATC 2004
dc.rightsUniversity of Pretoriaen
dc.subjectTransporten
dc.subjectAggregate-lime natural pozzolan mixesen
dc.subject.lcshTransportation -- South Africa -- Congressesen
dc.subject.lcshPozzuolanas -- South Africa -- Congressesen
dc.subject.lcshPozzuolanas -- South Africa -- Testingen
dc.subject.lcshRoads -- South Africa -- Design and constructionen
dc.titlePilot study results of the strength behaviour of aggregate-lime-natural pozzolan mixesen
dc.typeEventen

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