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首页> 外文期刊>International journal of sustainable transportation >Quantifying greenhouse gas emission of asphalt pavement preservation at construction and use stages using life-cycle assessment
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Quantifying greenhouse gas emission of asphalt pavement preservation at construction and use stages using life-cycle assessment

机译：用生命周期评估量化施工沥青路面保存温室气体排放量，使用阶段

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This article focused on quantifying environmental impact of asphalt pavement preservation at construction and use stage using life-cycle assessment (LCA) approach. Preservation treatments considered in the analysis include thin overlay, chip seal, and crack seal that are typically used by highway agencies. At construction stage, there are significant differences in emissions caused by various preservation treatments mainly due to different raw material components and manufacturing processes. At use stage, fuel consumptions vary significantly depending on tire rolling resistance that is affected by pavement surface characteristics. The Carbon Dioxide (CO2) emissions at the use stage were predicted using the Motor Vehicle Emission Simulator (MOVES) and pavement roughness models obtained from Long-Term Pavement Performance (LTPP) program. The results show that pavement preservation brings significant environmental benefit in reduction of CO2 emission due to the improved pavement surface condition despite the emission generated at construction stage. Thin overlay produces the highest life-cycle reduction in CO2 emission due to the large International Roughness Index (IRI) jump after treatment; while crack seal has the lowest reduction of CO2 emission. The optimum application timing of preservation treatment was determined for chip seal and thin overlay assuming one-time treatment applied before reaching the IRI threshold.
机译：本文专注于使用生命周期评估（LCA）方法量化沥青路面保护对沥青路面保护的环境影响。在分析中考虑的保存处理包括薄覆盖层，芯片密封和通常由公路机构使用的裂缝密封。在施工阶段，各种保存治疗引起的排放差异主要是由于原材料组分和制造过程不同。在使用阶段，燃料消耗取决于受路面表面特性影响的轮胎滚动阻力显着。使用从长期路面性能（LTPP）程序中获得的机动车辆发射模拟器（移动）和路面粗糙度模型来预测使用阶段的二氧化碳（CO2）排放。结果表明，尽管在施工阶段产生的发射，但路面保存引起的减少CO2发射的显着环境效益。由于治疗后的大型国际粗糙度指数（IRI）跳跃，薄覆盖物产生了CO2排放的最高生命周期减少;虽然裂缝密封具有最低减少二氧化碳排放。假设在达到IRI阈值之前施加一次性处理，确定了芯片密封和薄覆盖物的保存处理的最佳应用时序。

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