In order to study the energy consumption and carbon emission characteristics of asphalt pavement with different design life,the life cycle evaluation system was established. The energy consumption and carbon emission of flexible base asphalt pavement,typical semi rigid base asphalt concrete pavement and high content rubber modified asphalt pavement were quantitatively analyzed. By analyzing the sensitivity,this work identified the main links of energy consumption and carbon emission. And the influence of cement type,warm mixing technology,recycling technology and transport efficiency on the energy consumption and carbon emission of three kinds of asphalt pavement were analyzed. According to the research results,the energy consumption intensity of typical semi rigid base asphalt concrete pavement is 25. 29% and 153. 03% higher than that of flexible base asphalt pavement and high content rubber modified asphalt pavement,and the global warming potential value is 106. 97% and 107. 99% higher than that of the two long-life asphalt pavement,respectively. Cement production,asphalt production,heating and transportation are the main energy consumption and emission links. Among the general-purpose cements used in cement stabilized gravel bases, Portland blast-furnace slag cement (PS)has the lowest energy consumption and carbon emissions. After replacing ordinary Portland cement (PO)by PS,the carbon emissions of typical semi rigid base asphalt concrete pavement and high content rubber modified asphalt pavement dropped by 13. 17% and 12. 43%. After using the warm mixing technology,the carbon emission of flexible base asphalt pavement decreased the most,by 2. 41% and the energy consumption intensity of high content rubber modified asphalt pavement decreased the most,by 3. 71%. The reduction rate of energy consumption and carbon emission of typical semi-rigid asphalt pavement after using the warm mixing technology is relatively small. When the RAP content is 30%,three types of asphalt pavement decreases by 20. 64%,18. 56% and 15. 26% respectively,and the carbon emission decreases by 6. 92%,3. 92% and 4. 39% respectively. There is a positive correlation between the improvement rate of transport efficiency and the reduction rate of energy consumption and carbon emission of asphalt pavement. When the transportation efficiency is increased by 10%,three types of asphalt pavement will decrease by 1. 55%,1. 63%,2. 10% respectively,and the carbon emissions will decrease by 4. 03%, 3. 26%,3. 07% respectively. © 2024 Cailiao Daobaoshe/ Materials Review. All rights reserved.
