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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/3405

Title: Characterisation of the elastic properties of existing pavements : state of the art
Authors: Sanders, PJ
de Beer, M
du Plessis, HW
Keywords: Elastic modulus
Mechanistic pavement design
Flexible pavements
Rigid pavements
Back-calculation
Materials testing
In-situ testing
Laboratory testing
National Department of Transport
South Africa
Issue Date: 26-May-2009
Series/Report no.: RR 91/012
Abstract: Various aspects of the determinations and use of elastic moduli of pavements materials are herein addressed. Included is an investigation into the sensitivity of pavement life to changes in elastic material parameters, an update of moduli derived from Multi-Depth Deflectometer test results, a brief investigation of different back calculation techniques and a literature survey concentrating on information considered applicable to South African conditions. Recommendations are made regarding techniques or approaches used to determine elastic moduli rather than giving ranges of values form materials. Emphasis is placed on the concept of "expert intervention" in the design and assessment of pavements due to complex interaction of various factors. These include environmental, loading, materials and construction considerations. A reliable, fully automated, computerised system taking all these factors into consideration is at present not feasilble. Areas where further work is required are noted and recent publications on some of the "new" techniques of material testing are included.
Description: This report is a publication by the National Department of Transport, South Africa, made available by the CSIR
URI: http://hdl.handle.net/10204/3405
Appears in Collections:Infrastructure engineering
General science, engineering & technology

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