Life cycle energy consumption by roads and associated interpretative analysis of sustainable policies
Life cycle energy consumption by roads and associated interpretative analysis of sustainable policies
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DOI：
10.1016/j.rser.2021.110823
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发表时间：
2021-02-20
影响因子：
15.9
通讯作者：
Zhang, Lei
中科院分区：
文献类型：
--
作者：
Wang, Fusong;Xie, Jun;Zhang, Lei
大规模公路网在其生命周期内消耗大量能源密集型产品。然而，由于方法的系统界限不完整，定量评估的数据库不足，对道路能源消耗仍然知之甚少。为了全面了解道路对节能的影响，本研究采用生命周期评价（LCA）方法，对内蒙古某道路的总体能耗进行了调查。开发了三个结构道路层模型和本地化数据库，作为LCA方法的方法和数据的补充。结果表明：1 km道路消耗11.38 TJ（不确定度范围为-3.75%~34%），其中一半以上流入表层（5.16 TJ），其次是路基（4.87 TJ）和基层（1.35 TJ）。从生命周期的角度来看，材料提取被确定为主要的能源消耗（6.27 TJ）;道路服务和建筑分别使用3.01 TJ（26.59%）和1.74 TJ（15.37%）。复垦阶段消耗0.30 TJ，占2.65%。建议采取预防性养护措施和粘结剂生产程序是降低能耗的关键，基层和路基的施工应解决原材料运输的距离管理问题。先进的建筑技术，可再生能源和再生材料的应用是政策解释的三个高度推荐的方面。这项研究不仅有助于更全面和准确地评估减轻道路引起的密集能源消耗的方法，而且还为促进道路可持续发展提供了宝贵的信息。
Large-scale road networks consume numerous energy-intensive products over their life cycle. However, road energy consumption remains poorly understood due to the incomplete system boundaries of methodologies and inadequate databases for quantitative assessments. To provide a holistic account of roads' impacts on energy conservation, this study investigated overall energy consumption by a road located in Inner Mongolia, China, in light of life cycle assessment (LCA). The three structural road layers model and localized databases were developed as supplements to methodologies and data of the LCA approach. The results show that 1 km of the road consumes 11.38 TJ (with an uncertainty range of -3.75%-34%), more than half of which flows into the surface layer (5.16 TJ), followed by the subgrade (4.87 TJ) and base layers (1.35 TJ). From a life cycle perspective, material extraction was identified as the major energy consumer (6.27 TJ); road service and construction used 3.01 TJ (26.59%) and 1.74 TJ (15.37%), respectively. The reclamation phase consumed 0.30 TJ with a percentage of 2.65%. It is suggested that preventive maintenance treatments and binder production procedures are critical for energy consumption mitigation, and the construction of the base layer and subgrade should address the distance management of raw material transportation. Advanced construction techniques, renewable energy resources and recycled materials applications are three highly recommended aspects of policy interpretations. This study not only facilitates more complete and accurate assessments of means of alleviating intensive energy consumption induced by roads, but also provides valuable information for enhancing sustainable road development.