Sustainable paving alternative for low-volume roads using cold recycled asphalt

IF 1.5 4区 工程技术 Q3 ENGINEERING, CIVIL
María Elena Araneda, M. Pradena, Rodrigo Silva, Marcos Pardo
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引用次数: 2

Abstract

Reclaimed Asphalt Pavement (RAP) is a waste generated by removing asphalt material from a pavement. If the RAP is not recycled, the pavement will require new asphalt layers, typically formed by virgin materials (bitumen and aggregates). One way to recycle RAP, is by applying the cold asphalt technique with bitumen emulsion as an additive, which potentially has environmental benefits. This technique can be a cost-effective alternative for low-volume road (LVR) networks which connect to main asphalt paved roads. The objective of this research is to analyse the alternative of paving with RAP using cold bitumen emulsion as a binder. This pavement structure was compared with a traditional hot mix asphalt pavement as alternative for LVRs. The environmental impact analysis, through a streamlined Life Cycle Analysis, showed that the cold recycled alternative typically generates 50% less impact than a traditional pavement. In terms of global warming the hot mix asphalt pavement generates three times more emissions than the cold recycled alternative. The most important factors in these differences are the in-situ construction technique of the RAP alternative and, as is the case in Chile, the long distances to a hot mix asphalt plant.
使用冷再生沥青替代低容量道路的可持续铺装方案
再生沥青路面(RAP)是从路面上清除沥青材料产生的废物。如果RAP不回收,路面将需要新的沥青层,通常由原始材料(沥青和集料)形成。回收RAP的一种方法是采用沥青乳液作为添加剂的冷沥青技术,这种技术具有潜在的环境效益。这种技术对于连接主要沥青路面的低容量道路(LVR)网络来说是一种具有成本效益的替代方案。本研究的目的是分析用冷沥青乳液作为粘结剂的RAP铺装的替代方案。将这种路面结构与传统的热混合沥青路面作为lvr的替代方案进行了比较。通过简化的生命周期分析,环境影响分析表明,冷再生替代方案产生的影响通常比传统路面少50%。就全球变暖而言,热混合沥青路面产生的排放量是冷再生沥青路面的三倍。造成这些差异的最重要因素是RAP替代方案的现场施工技术,以及智利的情况,到热混合沥青厂的距离很远。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.70
自引率
16.70%
发文量
44
审稿时长
>12 weeks
期刊介绍: Engineering Sustainability provides a forum for sharing the latest thinking from research and practice, and increasingly is presenting the ''how to'' of engineering a resilient future. The journal features refereed papers and shorter articles relating to the pursuit and implementation of sustainability principles through engineering planning, design and application. The tensions between and integration of social, economic and environmental considerations within such schemes are of particular relevance. Methodologies for assessing sustainability, policy issues, education and corporate responsibility will also be included. The aims will be met primarily by providing papers and briefing notes (including case histories and best practice guidance) of use to decision-makers, practitioners, researchers and students.
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