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Please use this identifier to cite or link to this item: http://hdl.handle.net/10204/6028

Title: Mechanistic modelling of weak interlayers in flexible and semi-flexible road pavements: Part 2
Authors: De Beer, M
Maina, JW
Netterberg, F
Keywords: Semi-flexible pavements
Civil engineering
Road construction
Flexible pavements
Strain energy of distortion
SED
Issue Date: Apr-2012
Publisher: South African Institution of Civil Engineering
Citation: De Beer, M, Maina, JW and Netterberg, F. 2012. Mechanistic modelling of weak interlayers in flexible and semi-flexible road pavements: Part 2. Journal of the South African Institution of Civil Engineering, vol. 54(1), pp 43-54
Series/Report no.: Workflow;9345
Abstract: This paper (Part 2 of a two-part set of papers) discusses models and illustrates the adverse effects of weak layers, interlayers, laminations and/or weak interfaces in flexible and semi-flexible pavements, also incorporating lightly cemented layers. The modelling is based on mechanistic analyses for pavement design and evaluation. In Part 1, the effects of these relatively weak layers, interlayers, laminations and/or weak interfaces were discussed. It was shown that methodologies are available to detect and investigate the existence of these weak layers in cemented pavement layers. In Part 2, several cases of the above conditions for different road pavement types are discussed, with field examples. Mechanistic analyses were done on a typical hot mix asphalt (HMA), several cases of a cemented base pavement and a granular base pavement, with and without these weak layers and interface conditions to demonstrate their adverse effects. The analyses focus on the strain energy of distortion (SED) as a pavement response parameter to indicate the potential for structural damage expected within the pavement structure or layer. Generally, the higher the SED, the higher the potential damage in the pavement layer. SED shows some potential for quantifying the relative effects of these weak layers, interlayers, laminations and/or weak interfaces within flexible and semi-flexible pavements.
Description: Copyright: 2012 South African Institution of Civil Engineering
URI: http://www.scielo.org.za/pdf/jsaice/v54n1/05.pdf
http://hdl.handle.net/10204/6028
ISSN: 1021-2019
Appears in Collections:Infrastructure engineering
General science, engineering & technology

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