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Life-cycle assessment of climate change impact on time-dependent carbon-footprint of asphalt pavement

机译：气候变化的生命周期评估对沥青路面时间依赖性碳足迹的影响

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摘要

This study aims to quantify life-cycle carbon footprint of asphalt pavement due to warming temperatures under climate change scenario. Pavement Mechanistic-Empirical (ME) Design Method was used to simulate long-term pavement performance with historic and projected temperature inputs. Life-cycle assessment (LCA) was conducted to calculate CO2 emissions in pavement life cycle including phases of raw materials, plant production, transportation, field construction, traffic delay, and use. In particular, time-dependency of CO2 emission was considered with physical decay to increase the accuracy in estimating cumulative radiative forcing. It was found that warming temperatures would lead to faster structural deterioration of pavement, resulting in earlier or more frequent overlay treatments. Pavement rehabilitation treatments generate more CO2 emission in material and construction related stages but cause the reduction of CO2 emission in pavement use phase. The LCA results show that climate change causes greater CO2 emission abundance over the years during the study period.
机译：本研究旨在量化由于气候变化方案下的温暖温度导致的沥青路面的生命周期碳足迹。人行道机械 - 经验（ME）设计方法用于模拟历史和投影温度输入的长期路面性能。进行生命周期评估（LCA）以计算路面生命周期中的二氧化碳排放，包括原料，植物生产，运输，现场建设，交通延误和使用阶段。特别地，考虑了二氧化碳排放的时间依赖性与物理衰减，以提高估计累积辐射强制的准确性。发现温暖的温度会导致路面的结构性劣化，导致较早或更频繁的覆盖物理。路面康复治疗在材料和建筑相关阶段产生更多二氧化碳排放，但导致路面使用相中的二氧化碳排放量减少。 LCA结果表明，在研究期间，气候变化导致多年来的二氧化碳排放量大。

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