Effects of multiple recycling on the performance characteristics of asphalt binder using different recycling agents

IF 3.4 3区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY

Road Materials and Pavement Design Pub Date : 2023-10-19 DOI:10.1080/14680629.2023.2268744

Julia A. Rodrigues, Kamilla L. Vasconcelos, Amy Epps Martin, Edith Arámbula-Mercado, Eyad Masad

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引用次数: 0

Abstract

AbstractThe process of reclaimed asphalt pavement (RAP) recycling may occur multiple times during the life of the pavement. This study investigates the effect of multiple recycling on binder properties by employing a virgin 3045 PEN grade binder that was aged in the laboratory intended to simulate aging of binders in RAP. The aged binder was rejuvenated using two bio-oils and one softer binder. The doses of the bio-oils and softer binder were determined by matching the continuous high-temperature performance grade (PGH) of the rejuvenated RAP binder to that of the virgin binder. This aging and rejuvenation cycle was repeated three times. Finally, fatigue and rutting performance of the binder was evaluated for the three reuse levels. Results indicate that the material can be reused up to three cycles keeping good performance on fatigue or rutting. However, care should be taken regarding the cumulative effect of bio-oils causing an over-softening effect on the of the RAP.KEYWORDS: Reclaimed asphalt pavement; Recycling agent; Multiple recyclingBlending chartsRAP percent Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis work was supported by Fundação de Amparo à Pesquisa do Estado de São Paulo: [Grant Number 2019/11354-4].

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多次回收对不同回收剂沥青粘结剂性能特性的影响

摘要再生沥青路面在其使用寿命期间可能会发生多次再生过程。本研究通过在实验室老化的3045 PEN级原始粘结剂来模拟RAP中粘结剂的老化，研究了多次回收对粘结剂性能的影响。使用两种生物油和一种较软的粘合剂使老化的粘合剂恢复活力。通过将再生RAP粘结剂的连续高温性能等级(PGH)与原始粘结剂的连续高温性能等级相匹配来确定生物油和软粘结剂的剂量。这个衰老和恢复活力的循环重复了三次。最后，对三种重复使用水平下粘结剂的疲劳和车辙性能进行了评价。结果表明，该材料可重复使用3次，并保持良好的抗疲劳和车辙性能。然而，应该注意的是，生物油的累积效应会导致RAP的过度软化效应。关键词:再生沥青路面;回收剂;多重回收混合图表rap百分比披露声明作者未报告潜在的利益冲突。本研究得到了圣保罗州健康基金的支持:[资助号2019/11354-4]。

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来源期刊

Road Materials and Pavement Design 工程技术-材料科学：综合

CiteScore

8.10

自引率

8.10%

发文量

105

审稿时长

3 months

期刊介绍： The international journal Road Materials and Pavement Design welcomes contributions on mechanical, thermal, chemical and/or physical properties and characteristics of bitumens, additives, bituminous mixes, asphalt concrete, cement concrete, unbound granular materials, soils, geo-composites, new and innovative materials, as well as mix design, soil stabilization, and environmental aspects of handling and re-use of road materials. The Journal also intends to offer a platform for the publication of research of immediate interest regarding design and modeling of pavement behavior and performance, structural evaluation, stress, strain and thermal characterization and/or calculation, vehicle/road interaction, climatic effects and numerical and analytical modeling. The different layers of the road, including the soil, are considered. Emerging topics, such as new sensing methods, machine learning, smart materials and smart city pavement infrastructure are also encouraged. Contributions in the areas of airfield pavements and rail track infrastructures as well as new emerging modes of surface transportation are also welcome.