Sanders, PJDe Beer, Morrisdu Plessis, HW2009-05-262009-05-262009-05-26Sanders, P., De Beer, M. & du Plessis, H. 2009. <i>Characterisation of the elastic properties of existing pavements : state of the art</i>. (RR 91/012). http://hdl.handle.net/10204/3405 .http://hdl.handle.net/10204/3405This report is a publication by the National Department of Transport, South Africa, made available by the CSIRVarious 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.enElastic modulusMechanistic pavement designFlexible pavementsRigid pavementsBack-calculationMaterials testingIn-situ testingLaboratory testingNational Department of TransportSouth AfricaReportSanders, P., De Beer, M., & du Plessis, H. (2009). <i>Characterisation of the elastic properties of existing pavements : state of the art</i> (RR 91/012). Retrieved from http://hdl.handle.net/10204/3405Sanders, PJ, Morris De Beer, and HW du Plessis <i>Characterisation of the elastic properties of existing pavements : state of the art.</i> RR 91/012. 2009. http://hdl.handle.net/10204/3405Sanders P, De Beer M, du Plessis H. Characterisation of the elastic properties of existing pavements : state of the art. 2009 [cited yyyy month dd]. Available from: http://hdl.handle.net/10204/3405TY - Report AU - Sanders, PJ AU - De Beer, Morris AU - du Plessis, HW AB - 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. DA - 2009-05-26T13:46:05Z DB - ResearchSpace DP - CSIR KW - Elastic modulus KW - Mechanistic pavement design KW - Flexible pavements KW - Rigid pavements KW - Back-calculation KW - Materials testing KW - In-situ testing KW - Laboratory testing KW - National Department of Transport KW - South Africa LK - https://researchspace.csir.co.za PY - 2009 T1 - Characterisation of the elastic properties of existing pavements : state of the art TI - Characterisation of the elastic properties of existing pavements : state of the art UR - http://hdl.handle.net/10204/3405 ER -