The development of a rotational shear device for evaluating erodibility of stabilised subbases

Show simple item record

dc.contributor.author Ras, Elsabe
dc.contributor.upauthor Visser, Alex T.
dc.date.accessioned 2008-05-30T10:47:39Z
dc.date.available 2008-05-30T10:47:39Z
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. Soil properties and climatic effects all contribute to erosion of subbase material, which leads to rigid pavement failure. The erosion takes the form of pumping of material and water, subsequently creating voids. The formation of voids can lead to a rapid decline in the durability and serviceability of the pavement. At present there is not a single laboratory test, which could identify materials resistant to pumping. Thus there is a need to develop a laboratory test, which could predict erosion of material in a pavement. The aim of this paper is to present the initial results of a Rotational Shear Device (RSD) constructed to simulate erosion of subbase layers under a concrete slab. A review is given of existing tests, which are used to test for erosion. Motivation for the adoption of the RSD is given. Details of the device as well as pilot laboratory tests are also presented. Pilot laboratory tests were preformed on a G2 material stabilised with 2% and 4% Cem I 42.5 cement. Duplicate samples were tested at the CSIR with the mechanical wet-dry brushing test. As expected, the 4% stabilised samples eroded less than the 2% stabilised samples under the conditions in the RSD and thus was confirmed by results from the mechanical wet-dry brushing tests. en
dc.format.extent 450001 bytes
dc.format.mimetype application/pdf
dc.identifier.citation Ras, E. 2004,'The development of a rotational shear device for evaluating erodibility of stabilised subbases' , 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/2263/5701
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 Rotational shear devices en
dc.subject Erodibility en
dc.subject.lcsh Transportation -- South Africa -- Congresses en
dc.subject.lcsh Pavements -- Service life -- South Africa -- Congresses en
dc.subject.lcsh Pavements -- Corrosion -- South Africa -- Congresses en
dc.title The development of a rotational shear device for evaluating erodibility of stabilised subbases en
dc.type Event en


Files in this item

This item appears in the following Collection(s)

Show simple item record