Journal
ROAD MATERIALS AND PAVEMENT DESIGN
Volume 13, Issue 2, Pages 235-248Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/14680629.2012.688172
Keywords
MEPDG; CRCP; punchout; crack width; crack spacing; LTE
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Funding
- Federal Highway Administration (FHWA)
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The reasonableness of the models in the Mechanistic-empirical Pavement Design Guide (MEPDG) used to predict the performance of the continuously reinforced concrete pavements (CRCPs) was evaluated in this study. The MEPDG punchout, crack width and spacing and load transfer efficiency (LTE) models were evaluated through a factorial sensitivity study. The input matrix was defined to reflect 'real-world' design situations. It was found that, contrary to the 1993 American Association of State Highways and Transportation Officials (AASHTO) Design Guide, crack width must be below 0.5 mm to maintain adequate performance. Additionally, based on the performance predictions from the MEPDG, a crack spacing of less than 1.8 m ensures a crack width of less than 0.5 mm, which is another contradiction with the approach in the 1993 Guide.
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