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Evaluation of recycled asphalt pavement using economic, environmental, and energy metrics based on long-term pavement performance sections

机译:根据经济,环境和能源指标,基于长期路面性能部分评估再生沥青路面的状况

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摘要

Recycled materials have been used in roadway construction for years. Recently, with the advancement of material processing equipment and mix design technologies involving Recycled Asphalt Pavement (RAP), RAP's use in pavement construction is increasing. RAP's various desirable properties spur its use in sustainable development. These merits include energy conservation in mix production, cost savings in material consumption, and environmental protection. Although asphalt mix is considered to be recyclable - meaning RAP could be a sustainable material - in-depth studies verifying and quantifying its effectiveness are limited in the literature. Based on real-world data from pavements constructed with 35% RAP and virgin mixes, this study comprehensively evaluates the sustainability of RAP from three different aspects including cost, energy, and environment. The life cycle cost analysis based on RealCost and life cycle assessment based on PaLATE is used to compare RAP and virgin alternatives. The results suggest that using RAP is more economically efficient and environmentally viable than virgin pavement if thin asphalt overlay is involved. The findings of this study support RAP's use in current pavement rehabilitation practice, which usually involves relatively thin asphalt overlays.
机译:再生材料已用于道路建设多年。近年来,随着涉及再生沥青路面(RAP)的材料加工设备和混合设计技术的发展,RAP在路面施工中的使用正在增加。 RAP的各种理想特性促使其在可持续发展中的使用。这些优点包括混合生产中的节能,节省材料消耗的成本以及环境保护。尽管沥青混合料被认为是可回收的-这意味着RAP可能是一种可持续的材料-文献中对验证和量化其有效性的深入研究是有限的。基于使用35%RAP和原始混合料建造的路面的真实数据,本研究从成本,能源和环境三个不同方面全面评估了RAP的可持续性。使用基于RealCost的生命周期成本分析和基于PaLATE的生命周期评估来比较RAP和原始替代方案。结果表明,如果涉及薄沥青覆盖层,则使用RAP较原生路面在经济上和环境上更可行。这项研究的结果支持RAP在当前的路面修复实践中的使用,该实践通常涉及相对较薄的沥青覆盖层。

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