The use of the S.A.S.W. to evaluate the deterioration of pavement properties with increase in wheel loads

Show simple item record Van de Ven, M.F.C. Sadzik, E.
dc.contributor.other Southern African Transport Conference (20th : 2001 : Pretoria, South Africa)
dc.contributor.upauthor Engelbrecht, Johann C. (Johannes Cornelis), 1946- 2008-11-18T12:34:21Z 2008-11-18T12:34:21Z 2001-07
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: URL: en_US
dc.description.abstract Paper presented at the 20th Annual South African Transport Conference 16 - 20 July 2001 "Meeting the transport challenges in Southern Africa", CSIR International Convention Centre, Pretoria, South Africa. ABSTRACT: The application of a non-destructive test method for the determination of elastic properties of pavement layers and soil layers is being discussed. This method makes use of the seismic wave theory through the analysis of surface waves S A S W (Spectral analysis of surface waves. The SASW method is based on generation and detection of elastic stress waves, known as surface waves. Surface waves have a unique characteristic that, if the wave length is varied, the velocity of propagation of the surface waves also varies. This phenomenon is called dispersion. The dispersion characteristic of surface waves can be utilised to determine the layering and modulus profiles of pavement systems quite accurately. The method is non-destructive. Measurements are made at strains below .001% where the elastic properties of the materials are independent of the strain amplitude. The method is such that both the source and the receivers are located on the ground surface. The source is simply a transient vertical impact, which generates a group of surface waves of various frequencies that the medium transmits. A pilot study was conducted on a test site, with different test sections, that was situated on the road D 2388 near Cullinan in Gauteng Province. These test sections were constructed with different base course materials as part of a labour intensive project. The aim was to find out how well the SASW method could be applied to obtain information on the deterioration of the pavement, in terms of the change in stiffness, with the increase in number of wheel load repetitions. The results obtained were such that a relatively complete picture of the status of the structure of the road could be obtained. The deterioration with the increase in load repetitions was well defined. The testing contributed to a better knowledge and understanding of what is happening underneath a loaded pavement structure. en_US
dc.identifier.citation Engelbrecht, JC, Van de Ven, M & Sadzik, E 2001, 'The use of the S.A.S.W. to evaluate the deterioration of pavement properties with increase in wheel loads', Paper presented to the 20th Annual South African Transport Conference, South Africa, 16 - 20 July. en_US
dc.identifier.isbn 0620277653
dc.language eng
dc.language.iso en en_US
dc.publisher SATC en_US
dc.relation.ispartof SATC 2001
dc.rights University of Pretoria en_US
dc.subject Elastic properties en_US
dc.subject Pavement layers en_US
dc.subject Soil layers en_US
dc.subject S A S W (Spectral analysis of surface waves) en_US
dc.subject Dispersion en_US
dc.subject Surface waves en_US
dc.subject Cullinan en_US
dc.subject.lcsh Transportation -- South Africa -- Congresses en
dc.subject.lcsh Pavements -- Testing -- Congresses en
dc.subject.lcsh Pavements -- Performance -- South Africa -- Congresses en
dc.title The use of the S.A.S.W. to evaluate the deterioration of pavement properties with increase in wheel loads en_US
dc.type Presentation en_US

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