Evaluation and Application of USP Low Temperature Modified Asphalt Mixture for Road Use
In order to respond to the construction and production mode of green,low-carbon,energy saving,environmental protection and pollutant emission reduction advocated by the state,relying on the new construction project of cross-river tunnel(Jiangyang North Road-Mudanjiang Road)along the river channel,the road performance of two kinds of mixtures,namely hot mix modified asphalt mixture and USP low temperature modified asphalt mixture,was tested in the laboratory according to the actual engineering technical requirements.The corresponding technical indexes in the production and construction of USP low-temperature modified asphalt mixture were analyzed in the whole process,and the application effect of USP low-temperature modified asphalt mixture was evaluated and analyzed after completion.The results show that the USP low-temperature modified SMA-13 asphalt mixture has significantly higher high temperature stability than SMA-13 hot-mix modified asphalt mixture,and slightly higher low temperature stability.The residual stability and freeze-thaw splitting strength are slightly lower,but they all meet the corresponding technical requirements.The discharge temperature,paving temperature and compaction temperature are all reduced by more than 20℃.USP low-temperature asphalt technology compared with traditional construction technology,reduce energy consumption and flue gas emissions,reduce the impact on construction personnel and the surrounding environment,energy saving and emission reduction effect is significant.
USPLow temperatureAsphalt mixturesRoad performanceEnergy saving and emission reduction
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