Warm mix asphalt(WMA)has gained significant attention in the asphalt industry,tradi-tionally dominated by Hot mix asphalt(HMA),due to its advantages in reducing energy consumption and lowering carbon emissions.This st...Warm mix asphalt(WMA)has gained significant attention in the asphalt industry,tradi-tionally dominated by Hot mix asphalt(HMA),due to its advantages in reducing energy consumption and lowering carbon emissions.This study introduces an innovative warm mix technology,soft-hard compound warm mix asphalt(SHC-WMA),which combines the low softening point of soft asphalt for effective coating of aggregate particles at reduced temperatures,with the high viscosity and aging resistance of rock asphalt to enhance the mixture’s overall performance.Unlike conventional WMA technologies,SHC-WMA was specifically developed with an optimized mixing temperature as a critical design parame-ter.Through extensive laboratory and field testing,this paper evaluates and compares the road performance,compaction efficiency,emissions reduction,energy savings,and cost-effectiveness of SHC-WMA against Sasobit Warm mix asphalt(SA-WMA)and HMA.The results highlight the superior performance of SHC-WMA,particularly in high-temperature stability and fatigue resistance.SHC-WMA demonstrates a 25%improvement in rutting resistance over HMA and a 15%increase in fatigue life compared to SA-WMA,making it highly suitable for long-term road applications.Furthermore,SHC-WMA signif-icantly outperforms both HMA and SA-WMA in terms of environmental impact,achieving reductions in CO_(2) emissions by 27.0%,particulate matter by 35.0%,and benzo[a]pyrene emissions by 55.3%compared to HMA.In terms of energy efficiency,SHC-WMA reduces diesel consumption for asphalt heating by 83.2%and heavy oil consumption for aggregate heating by 28.3%when compared to HMA.The cost of SHC-WMA is 7.7%higher than HMA,and represents 99.2%of the cost of SA-WMA.Additionally,SHC-WMA exhibits the lowest rut depth after eight years of service,indicating its superior long-term performance.展开更多
基金supported by the National Natural Science Foundation of China(No.52278455)the highway administration bureau of Hangzhou.
文摘Warm mix asphalt(WMA)has gained significant attention in the asphalt industry,tradi-tionally dominated by Hot mix asphalt(HMA),due to its advantages in reducing energy consumption and lowering carbon emissions.This study introduces an innovative warm mix technology,soft-hard compound warm mix asphalt(SHC-WMA),which combines the low softening point of soft asphalt for effective coating of aggregate particles at reduced temperatures,with the high viscosity and aging resistance of rock asphalt to enhance the mixture’s overall performance.Unlike conventional WMA technologies,SHC-WMA was specifically developed with an optimized mixing temperature as a critical design parame-ter.Through extensive laboratory and field testing,this paper evaluates and compares the road performance,compaction efficiency,emissions reduction,energy savings,and cost-effectiveness of SHC-WMA against Sasobit Warm mix asphalt(SA-WMA)and HMA.The results highlight the superior performance of SHC-WMA,particularly in high-temperature stability and fatigue resistance.SHC-WMA demonstrates a 25%improvement in rutting resistance over HMA and a 15%increase in fatigue life compared to SA-WMA,making it highly suitable for long-term road applications.Furthermore,SHC-WMA signif-icantly outperforms both HMA and SA-WMA in terms of environmental impact,achieving reductions in CO_(2) emissions by 27.0%,particulate matter by 35.0%,and benzo[a]pyrene emissions by 55.3%compared to HMA.In terms of energy efficiency,SHC-WMA reduces diesel consumption for asphalt heating by 83.2%and heavy oil consumption for aggregate heating by 28.3%when compared to HMA.The cost of SHC-WMA is 7.7%higher than HMA,and represents 99.2%of the cost of SA-WMA.Additionally,SHC-WMA exhibits the lowest rut depth after eight years of service,indicating its superior long-term performance.
