抗车辙MPE改性沥青混合料性能研究

采用MPE和SBS两种改性剂,对比研究了基质沥青、MPE改性沥青与花岗岩碎石的黏附性;分析了加抗剥落剂的基质沥青、加抗剥落剂的SBS改性沥青和MPE改性沥青与酸性花岗岩碎石混合料的路用性能。研究结果表明:MPE改性沥青和花岗岩碎石的黏附等级为5级;掺加MPE的AC-13沥青混合料,其动稳定度为60,70,80℃条件下分别超过6 000,5 000,2 000次/mm,马歇尔稳定度比基质沥青混合料提高35%,比掺加5%SBS的改性沥青混合料提高23%;浸水残留稳定度达到98%,比基质沥青混合料提高11%,比SBS改性沥青混合料提高5%;冻融劈裂残留强度比达到97%,较基质沥青提高8%。

Performance Study on Anti-Rutting MPE Modified Asphalt Mixture

Through adopting MPE and SBS modifiers,the adhesion of base asphalt with granite,MPE modified asphalt and crushed stone were studied comparatively.The road properties of acid granite gravel mixed separately with base asphalt,SBS modified asphalt both including anti-stripping agent and MPE modified asphalt were also researched.Firstly,the adhesion rank of MPE modified asphalt mixed with granite gravel is the fifth level.Secondly,the dynamic stability of AC-13 asphalt with MPE is more than 6000 mm per stroke at 60℃,more than 5000 mm per stroke at 70℃ and more than 2000 mm per stroke at 80℃.Moreover,the Marshall stability of asphalt mixtures with MPE is 35% higher than that of matrix asphalt mixtures,and 23% higher than that of 5% SBS modified asphalt mixture.Besides,bits immersion residual stability reaches 98% which increases by 11% compared with that of matrix asphalt mixtures and by 5% compared with that of SBS modified asphalt mixtures.Lastly,its TSR reaches 97% which increases by 8% compared with that of matrix asphalt mixtures.