Fatigue Evaluation of Recycled Asphalt Mixture Based on Energy-Controlled Mode

Ma, Tao; Cui, Kai; Huang, Xiaoming

doi:10.1155/2017/3623658

Cited by 7 publications

(3 citation statements)

References 26 publications

(26 reference statements)

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“…The high fatigue life of the aged asphalt mixtures is attributed to the mode of the applied load, which was in this study stress-controlled. This finding was similar to the results obtained by Ma et al [46], in which the stiff asphalt mixtures incorporating 50% of reclaimed asphalt pavement (RAP) exhibited better fatigue life in the stress-controlled mode compared to the reference asphalt mixtures, while it showed the worst fatigue life in the strain-controlled mode. The high stiffness modulus of the asphalt mixtures increases the fatigue life in the stress-controlled mode and decreases the cracking resistance in the strain-controlled mode.…”

Section: The Resistance Of the Asphalt Mixtures To Crackingsupporting

confidence: 91%

Influence of the Long-Term Oven Aging on the Performance of the Reinforced Asphalt Mixtures

et al. 2020

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The long-term aging of the asphalt mixtures has become a major concern because it decreases the lifespan of the asphalt layer. In this study, the asphalt mixtures incorporating steel slag aggregates were reinforced with synthetic fibers as a novel contribution in terms of decreasing the effect of aging on the performance of the asphalt mixtures. However, different mixtures—namely, Mix0, Mix1, and Mix2—were subjected to long-term oven aging to study the effect of the aging on the performance of the asphalt mixes. Mix0 consisted of coarse and fine granite aggregates, while Mix1 was composed of coarse steel slag aggregate and fine granite aggregate. Mix2 represents the reinforced asphalt mixtures incorporating coarse steel slag aggregate and reinforced with the synthetic fibers of polyvinyl alcohol, acrylic, and polyester at the proportion of 0.3% by weight of the aggregates. The conducted performance tests were resilient modulus, rutting depth, and cracking resistance. The outputs of the performance tests for the unaged asphalt mixes displayed that the mixtures incorporating coarse steel slag aggregate exhibited better performance than the mixtures containing granite aggregate. Meanwhile, the reinforced asphalt mixtures have shown a lower resilient modulus and a higher permanent deformation than the unreinforced asphalt mixes due to the elastic behavior. Otherwise, the reinforced asphalt mixtures have shown superior resistance to cracking in comparison to the unreinforced mixtures. On the other hand, the performance of the aged asphalt mixtures demonstrated that the mixtures containing granite aggregates exhibited a lower susceptibility to aging than the mixtures incorporating steel slag aggregate. Meanwhile, the performance of the aged reinforced asphalt mixtures showed that introducing synthetic fibers has decreased the effect of the long-term oven aging.

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Section: The Resistance Of the Asphalt Mixtures To Crackingsupporting

confidence: 91%

Influence of the Long-Term Oven Aging on the Performance of the Reinforced Asphalt Mixtures

et al. 2020

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“…Bio-rejuvenators appear to act in the mixture like petroleum M A N U S C R I P T A C C E P T E D ACCEPTED MANUSCRIPT 4 rejuvenators. It has also been shown in laboratory that fatigue life could be improve by increasing the RAP content (Ma et al, 2016a, Ma et al, 2017.…”

Section: Full-scale Validation Of Bio-recycled Asphalt Mixtures For Rmentioning

confidence: 96%

Full-scale validation of bio-recycled asphalt mixtures for road pavements

Blanc¹,

Huard²,

Sotoodeh-Nia

et al. 2019

Journal of Cleaner Production

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Recycling of asphalt has become a well-established practice in many countries, however the road pavement industry remains a bulk consumer of extracted raw materials. Novel solutions that find root in circular economy concepts and life-cycle approaches are needed in order to enable optimisation of infrastructure resource efficiency, starting from the design stage and spanning the whole value chain in the construction sector. Itis within this framework that the present study presents a full-scale validation of asphalt mixtures specifically designed to ensure durability of flexible road pavements and at the same time enabling the reuse of reclaimed asphalt pavement (RAP) through the incorporation of bio-materials as recycling agent. These bio-recycled asphalt mixtures have been first designed in laboratory and subsequently validated in a real scale experiment conducted at the accelerated pavement testing facilities at IFSTTAR. Four pavement sections were evaluated: three test sections with innovative bio-materials, and a reference section with a conventional, high modulus asphalt mix (EME2). Two tests were realized: a rutting test and a fatigue test and for each of them the evolution of bio-recycled asphalt mixtures properties as well as the pavement deteriorations were recorded and studied. Evolution of the bio-asphalt mixtures was monitored for a 5 months period after paving by a bespoke nondestructive micro-coring, extracting and recovering methodology developed at the Western Research Institute (WRI). The structural health of the pavement sections was monitored through periodic falling weight deflectometer (FWD) as well as with strain gages and temperature sensors. As a result the three tailored bio-asphalt mixtures performed similarly or better than the control mixture, both in terms of property evolutions and durability.

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“…By checking the thickness of the asphalt layer, it can be found that Type I function works for pavements with relatively thin asphalt layers (Section 37‐0859: 35.56 mm; Section 39‐0112: 101.6 mm), while Type II function works for pavements with thick asphalt layers (Section 19‐0101: 195.58 mm; Section 39‐0106: 170.18 mm; Section 39‐0110: 185.42 mm). As pointed out in a previous study, 38 the loading mode of the laboratory fatigue test is selected by the layer thickness of the pavement, and 127 mm is the critical value. Therefore, it is possible that the damage density development in pavements follows this criterion as well.…”

Section: Results and Analysismentioning

confidence: 99%

Backcalculation of damage density of in‐service asphalt pavements using artificial intelligence‐based finite element model updating

Deng

Luo

Wang

2021

Fatigue Fract Eng Mat Struct

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Fatigue damage is a common distress significantly affecting asphalt pavements in the performance, economy, and safety aspects. Accordingly, this paper aims to propose a methodology to backcalculate a continuum damage mechanics (CDM)‐based damage density of in‐service asphalt pavements from field nondestructive testing (NDT). An artificial intelligence (AI)‐based finite element (FE) model updating was applied with the falling weight deflectometer (FWD) test results for the calibrations of the damage density and supporting layer moduli. The development of the damage density with pavement service time was categorized and fitted with proposed analytical models. The damage density was compared with field observations on the fatigue cracking performance of asphalt pavements. It was found that the damage density had close relations with the material type, structural configuration, and fatigue cracking area of the pavement. This study shows a promising application of the damage density in the evaluation and prediction of the fatigue damage of asphalt pavements, which will lead to a timely and cost‐effective pavement maintenance and rehabilitation.

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Fatigue Evaluation of Recycled Asphalt Mixture Based on Energy-Controlled Mode

Cited by 7 publications

References 26 publications

Influence of the Long-Term Oven Aging on the Performance of the Reinforced Asphalt Mixtures

Influence of the Long-Term Oven Aging on the Performance of the Reinforced Asphalt Mixtures

Full-scale validation of bio-recycled asphalt mixtures for road pavements

Backcalculation of damage density of in‐service asphalt pavements using artificial intelligence‐based finite element model updating

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