Bitumen rubber asphalt in South Africa and experience in China

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dc.contributor.author Renshaw, R.H.
dc.contributor.author Hoffmann, P.
dc.contributor.author Potgieter, C.J.
dc.date.accessioned 2008-06-13T08:45:17Z
dc.date.available 2008-06-13T08:45:17Z
dc.date.issued 2007-07
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 26th Annual Southern African Transport Conference 9 - 12 July 2007 "The challenges of implementing policy?", CSIR International Convention Centre, Pretoria, South Africa. ABSTRACT:This paper describes an update and overview of the use of Bitumen-Rubber (BR) in South Africa. The South African experience with the transfer of the Bitumen-Rubber Technology to mainland China is also discussed briefly. The design procedures and construction practices used for the construction of Bitumen-Rubber Asphalt in rehabilitation projects in South Africa are also discussed. Bitumen- Rubber Asphalt / Hot Mix Asphalt (BRHMA) is normally used where the other asphalts have already failed or where the existing base courses are in severe distress. In addition they must also provide additional structural capacity for 10 to 15 years under severe traffic conditions. This paper describes and discusses the following aspects -The constituent materials used in the manufacture of BR binder and the BRHMA. The South African materials specification is furnished and discussed. -The SA asphalt mix design process including the type selection; the volumetric design process and the BRHMA end point specification. -Further developments (rutting, fatigue, energy methods, moisture sensitivity, Dynamic Creep). -BRHMA structural equivalency which is based on the work done by the CSIR on behalf of the California Department of Transport (CALTRANS). -Construction of BRHMA. -Environmental aspects and costs related to this technology. -A South African experience in the introduction of this technology to mainland China. Summary and Conclusions The perception that the cost of BRA is higher than conventional or polymer asphalt fails to take into account the costs related to -The use of reduced thicknesses of BRHMA versus other asphalts as per the CALTRANS / CSIR Projects -Savings in traffic accommodation and bypasses when alternative crusher run designs are used. -The cost implications related to the environmental issue of disposing of scrap tyres. en
dc.format.extent 730611 bytes
dc.format.mimetype application/pdf
dc.identifier.citation Renshaw, RH, Hoffman, P & Potgieter, CJ 2007,'Bitumen rubber asphalt in South Africa and experience in China', Paper presented to the 26th Annual Southern African Transport Conference, South Africa, 9 - 12 July 2007. 13p. en
dc.identifier.isbn 192001702X
dc.identifier.uri http://hdl.handle.net/2263/5926
dc.language eng
dc.language.iso en en
dc.publisher SATC en
dc.relation.ispartof SATC 2007
dc.rights University of Pretoria en
dc.subject Transport policies en
dc.subject Bitumen-Rubber (BR) en
dc.subject Bitumen-Rubber Asphalt en
dc.subject Hot Mix Asphalt (BRHMA) en
dc.subject.lcsh Transportation -- South Africa -- Congresses en
dc.subject.lcsh Asphalt -- Specifications -- South Africa -- Congresses en
dc.subject.lcsh Asphalt-rubber -- South Africa -- Congresses en
dc.subject.lcsh Asphalt concrete pavements -- Quality control en
dc.title Bitumen rubber asphalt in South Africa and experience in China en
dc.type Event en


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