Long-Term Performance of Pavement with High Recycled Asphalt Content

Anderson, Evan; Daniel, Jo Sias

doi:10.3141/2371-01

Cited by 14 publications

(8 citation statements)

References 2 publications

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“…The milled asphalt material named reclaimed asphalt pavement (RAP; according to the European norm EN 13108-8) can then be reused by incorporation into a new asphalt mixture, providing possible economic and environmental benefits, as important as the rate of RAP in new asphalt mixtures is high. Anderson and Daniel [1] reported the long-term performance of roadway sections with a high amount of RAP (20 % or more) compared with virgin sections. The results indicated that the sections with high RAP content mainly tended to exhibit a ''lower ride quality, more cracking, and better rutting resistance than the virgin sections, but the differences were not always statistically significant''.…”

Section: Introductionmentioning

confidence: 98%

Durability of hot and warm asphalt mixtures containing high rates of reclaimed asphalt at laboratory scale

Lopes

Gabet²,

Bernucci

et al. 2014

Mater Struct

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Within the framework of a sustainable development, manufacturing bituminous mixtures while reducing energy and using less new aggregates and new bitumen may be considered as an important topic, according to the quantities of asphalts mixtures produced for creating and maintaining road networks. This work aims to study the interest and the potential problems when coupling the warm mix asphalt technology (WMA) and the use of high ratio of reclaimed asphalt pavement (RAP) in the mixture. Initially, a study on managing RAP is performed, aiming to show that separating RAP aggregates in several fractions leads to a higher control of RAP in terms of homogeneity. Homogeneity of RAP is a key point for increasing recycling rates. The present study coupling WMA and RAP is based on the French design method for manufacturing asphalt concretes, which includes gyratory compaction tests, French wheel tracking tests, complex modulus tests and fatigue tests. However, the French design method does not take into account the physical and chemical aging of bituminous mixtures with time. As we consider that coupling WMA and RAP may lead to aging problems, it was decided to use an aging process before performing the standard tests. The results show that a WMA containing a high ratio of RAP has good performances according to the standard relative to this material, whatever the test. However, this material tends to be more sensitive to fatigue than hot and warm mixes without RA

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Section: Introductionmentioning

confidence: 98%

Durability of hot and warm asphalt mixtures containing high rates of reclaimed asphalt at laboratory scale

Lopes

Gabet²,

Bernucci

et al. 2014

Mater Struct

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“…Great progress has been made in the research of recycled asphalt mixture with a high content of RAP, mainly focusing on the improvement of processing technology, the addition of rejuvenating agents and the assessment of mechanical performance [ 16 , 17 , 18 , 19 , 20 , 21 ]. It is practicable to apply 50% or even more RAP under an optimal condition to meet the requirement of the long-term performance of asphalt pavement in spite of more rutting and crack diseases occurring [ 22 , 23 ]. However, research rarely revealed the environmental impact induced by the application of recycled asphalt mixtures, especially on atmospheric pollution emissions.…”

Section: Introductionmentioning

confidence: 99%

Environmental Impact on VOCs Emission of a Recycled Asphalt Mixture with a High Percentage of RAP

Wei

Zhu

et al. 2021

Materials

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Recycling of reclaimed asphalt pavement (RAP) has gradually emerged as a hot topic in the current research of building materials. Manufacturing the recycled asphalt mixture with a high RAP content still remains a major challenge due to the problem of inferior water damage resistance and fatigue cracking resistance. The aim of this study is to evaluate the servicing performance of recycled asphalt mixture with high percentage of RAP and assess its environmental impact on volatile organic compounds (VOCs) emission. To further explore the intrinsic factor on the performance of a recycled asphalt mixture, the mixed asphalt binder with a different content of extracted RAP binder was firstly investigated. The results show that the larger the content of RAP binder, the lower the mechanical indexes and VOCs emission. There exists an internal relationship between the chemical composition and VOCs release behavior with the variation of the recycled asphalt binder content. Based on the results of mixed recycled asphalt binder, the road servicing performance of a rather high utilization of RAP (i.e., 50%, 60%, and 70%) was assessed. It was found that the reuse of RAP aggregates has little influence on the volume performance of recycled asphalt mixture, and servicing performances still meet the construction requirements in spite of a descending trend. Moreover, a significant reduction effect on VOCs emission was found in the mixing stage of recycled asphalt mixture, indicating that the VOCs emission can be decreased by 94.82% when the content of RAP aggregates increases to 70%. The recycling of RAP with a high content contributes to the sustainable development of road engineering and the construction of green pavements.

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“…The main reason for the reluctance to add more RAP to the mix is that RAP contains asphalt binder that has been aged, and incorporating higher RAP contents into HMA can produce mixtures that are stiffer and more brittle than similar mixtures without RAP. Although increased stiffness would improve the rutting resistance of the asphalt mixtures, the reduced ductility makes the mixes more susceptible to thermal and fatigue cracking in the field (3)(4)(5)(6)(7)(8).…”

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confidence: 99%

Fatigue and Rutting Evaluation of Laboratory-Produced Asphalt Mixtures Containing Reclaimed Asphalt Pavement

Sabouri

Bennert

Daniel

et al. 2015

Transportation Research Record

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This study evaluated the performance of reclaimed asphalt pavement (RAP) mixtures for (a) RAP percentage, (b) asphalt content, and (c) various base binders. All RAP mixtures were produced in the laboratory for better control of the plant production variables. A simplified viscoelastic continuum damage model was used to evaluate the fatigue properties of the mixtures, and the triaxial stress sweep (TSS) test was used to evaluate rutting. In addition, layered viscoelastic critical distresses (LVECD) pavement analysis was used to predict the fatigue resistance of the mixtures. To explain the observed fatigue and rutting behavior, binder testing was performed on binders extracted and recovered from the mixtures. The test parameters included performance grade, low-temperature critical cracking temperature, and multiple stress creep and recovery parameters tested at a high temperature. Incorporating soft binder was found to be a promising strategy because the binder test data and LVECD predictions indicated a noticeable improvement in the fatigue resistance of the mixes. The TSS test data did not show a significant reduction in rutting resistance. The predictions clearly showed that increasing the asphalt layer thickness could lead to improved pavement performance. Mixtures with low asphalt binder content (0.5% below the optimum binder content) turned out to be susceptible to fatigue. The best strategy for incorporating high percentages of RAP seemed to be the use of a soft base binder while maintaining the optimum asphalt binder content or increasing the asphalt layer thickness.

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Long-Term Performance of Pavement with High Recycled Asphalt Content

Cited by 14 publications

References 2 publications

Durability of hot and warm asphalt mixtures containing high rates of reclaimed asphalt at laboratory scale

Durability of hot and warm asphalt mixtures containing high rates of reclaimed asphalt at laboratory scale

Environmental Impact on VOCs Emission of a Recycled Asphalt Mixture with a High Percentage of RAP

Fatigue and Rutting Evaluation of Laboratory-Produced Asphalt Mixtures Containing Reclaimed Asphalt Pavement

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