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

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dc.contributor.author Olekambainei, A.K.E.
dc.contributor.upauthor Visser, Alex T.
dc.date.accessioned 2008-05-30T10:46:31Z
dc.date.available 2008-05-30T10:46:31Z
dc.date.issued 2004-07
dc.description This 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.za en
dc.description.abstract Paper 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.extent 220923 bytes
dc.format.mimetype application/pdf
dc.identifier.citation Olekambainei, 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.isbn 1920017232
dc.identifier.uri http://hdl.handle.net/2263/5692
dc.language eng
dc.language.iso en en
dc.publisher SATC en
dc.relation.ispartof SATC 2004
dc.rights University of Pretoria en
dc.subject Transport en
dc.subject Aggregate-lime natural pozzolan mixes en
dc.subject.lcsh Transportation -- South Africa -- Congresses en
dc.subject.lcsh Pozzuolanas -- South Africa -- Congresses en
dc.subject.lcsh Pozzuolanas -- South Africa -- Testing en
dc.subject.lcsh Roads -- South Africa -- Design and construction en
dc.title Pilot study results of the strength behaviour of aggregate-lime-natural pozzolan mixes en
dc.type Event en


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