Comparative performance of rubber modified hot mix asphalt under ALF loading : technical summary.
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2004-07-01
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Alternative Title:Comparative performance of rubber modified hot mix asphalt under ALF loading.
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Abstract:The objectives of this study were to evaluate the overall performance under accelerated loading of hot mix asphalt mixtures containing powdered rubber modifier (PRM) as compared to similar mixes with conventional HMA and to optimize the use of these materials in the pavement structure. Additionally, the determination of an appropriate structural coefficient (a-value) for use of these materials in the structural design of flexible pavements using the AASHTO design procedure was required.
To achieve these objectives, three test lanes were constructed at the LTRC Pavement Research Facility (PRF) using conventional and rubberized HMA. Loads were applied and field performance data were collected until failure occurred using the selected failure criteria. The second part of this study involved conducting numerical simulation of test lanes using two finite element programs: FLEXPASS and ABAQUS.
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