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Evaluation system for CO_2 emission of hot asphalt mixture 被引量:12
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作者 Bo Peng Chunli Cai +2 位作者 Guangkai Yin Wenying Li yaowen zhan 《Journal of Traffic and Transportation Engineering(English Edition)》 2015年第2期116-124,共9页
The highway construction industry plays an important role in economic and development, but is also a primary source of carbon emission. Accordingly, with the global climate change, energy conservation and reduction of... The highway construction industry plays an important role in economic and development, but is also a primary source of carbon emission. Accordingly, with the global climate change, energy conservation and reduction of carbon emissions have become critical is- sues in the highway construction industry. However, to date, a model for the highway construction industry has not been established. Hence, to implement a low-carbon con- struction model for highways, this study divided asphalt pavement construction into aggregate stacking, aggregate supply, and other stages, and compiled a list of energy consumption investigation. An appropriate calculation model of CO2 emission was then built. Based on the carbon emission calculation model, the proportion of carbon emissions in each stage was analyzed. The analytic hierarchy process was used to establish the system of asphalt pavement construction with a judgment matrix, thereby enabling calculation of the weight coefficient of each link. In addition, the stages of aggregate heating, asphalt heating, and asphalt mixture mixing were defined as key stages of asphalt pavement construction. Carbon emissions at these stages accounted for approximately 90% of the total carbon emissions. Carbon emissions at each stage and their impact on the environment were quantified and compared. The energy saving construction schemes as well as the environmental and socioeconomic benefits were then proposed. Through these schemes, significant reductions in carbon emissions and costs can be achieved. The results indicate that carbon emissions reduce by 32.30% and 35.93%, whereas costs reduce by 18.58% and 6.03%. The proposed energy-saving and emission reduction scheme can pro- vide a theoretical basis and technical support for the development of low-carbon highway construction. 展开更多
关键词 Asphalt mixture CO2 emission Analytic hierarchy process Energy-saving and emissionreduction
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