Warm-mix asphalt (WMA) and the inclusion of higher percentages of reclaimed asphalt pavement (RAP) are two strategies for developing environmentally friendly pavement structures that can also reduce pavement cost. Although demonstration projects have evaluated the constructability and short-term performance of these technologies in the field, questions remain about the structural characterization and longer-term field performance. As part of the 2009 National Center for Asphalt Technology test track, four sections were constructed; they included both WMA and high-RAP contents (50% RAP). A control section did not include either technology. Every section featured embedded instrumentation that facilitated strain versus temperature characterization under truck loading. Statistical comparisons of measured strain response were conducted at three reference temperatures. At the lowest temperature (50°F), the measured strain in the control section was not statistically different from the strains of the experimental sections. At the intermediate temperature (68°F), strains in the RAP with WMA section were statistically lower than the control, but the other sections were not distinguished from the control. At the highest temperature (110°F), the strain in the control section was statistically higher than all other sections. The WMA sections were next highest, and the RAP sections were the lowest. The base mixtures of each section underwent beam fatigue testing from which fatigue transfer functions were developed. Strains entered into their section-specific transfer functions showed that the RAP–WMA section would perform the best. Continued testing and monitoring of the sections are necessary to validate this finding.
Full-Scale Structural Evaluation of Fatigue Characteristics in High Reclaimed Asphalt Pavement and Warm-Mix Asphalt
Transportation Research Record
Transportation Research Record: Journal of the Transportation Research Board ; 2208 , 1 ; 56-63
2011-01-01
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Field Evaluation of High Reclaimed Asphalt Pavement–Warm-Mix Asphalt Project in Florida
Transportation Research Record | 2010
|Transportation Research Record | 2012
|Transportation Research Record | 2016
|Field Evaluation of High Reclaimed Asphalt Pavement-Warm-Mix Asphalt Project in Florida: Case Study
Online Contents | 2010
|