沥青混合料在拌和摊铺中的能耗及碳排放计算与测试
Calculation and Test of Energy Consumption and Carbon Emissions of Asphalt Mixtures in Mixing and Paving

为了量化计算沥青混合料在拌和生产与摊铺碾压过程中的能源消耗及温室气体排放量，本研究选用了70^#基质沥青和SBS改性沥青混合料AC-13，通过沥青的黏度试验和混合料的变温击实试验，确定了拌和温度和压实功，建立了在原材料加热、混合料拌和及压实阶段的能耗和排放计算模型，并进行了量化计算。结果表明，沥青混合料的生产能耗主要是加热原材料的燃料消耗和碾压混合料的压实功耗，并通过燃料燃烧来排放CO₂等气体。与SBS沥青混合料相比，70^#沥青混合料的拌和温度要低10℃左右，可减少燃料消耗和CO₂排放量约6.4%，降低压实功约18%~26%。对于生产拌和混合料的燃料来说，煤粉的热效率最低，用量和碳排放最多，达到相同加热效果时，重油比煤粉降低排放约29%，天然气降低约51%。
To quantitatively calculate the energy consumption and greenhouse gas emission of asphalt mixture during the mixing production and paving and rolling periods, the 70^# base asphalt and SBS-modified asphalt mixture AC-13 were utilized in this study. Mixing temperature and compaction work were determined through the viscosity test of asphalt and variable-temperature compaction test of the mixture. The calculation models of energy consumption and emission of asphalt mixture during the raw materials heating, mixture mixing, and compaction were established and quantitatively calculated. The results indicate that the energy consumption of asphalt mixture production is mainly the fuel consumption of raw materials heating and compaction work consumption of paving mixtures, and the emission of CO₂ and other gases through fuel combustion. Compared with SBS-modified asphalt mixture, the mixing temperature of 70^# asphalt mixture is about 10°C lower, which can effectively reduce fuel consumption and CO₂ emissions by 6.4%, and reduce the compaction work by about 18%~26%. In addition, as for the fuel used to produce the mixing mixture, pulverized coal has the lowest thermal efficiency, and thus has the highest consumption and carbon emissions. When achieving the same heating effect, the heavy oil can reduce emissions by about 29% compared to pulverized coal, and natural gas can reduce emissions by 51%.