摘要
为对比分析不同成型方式对AC-20沥青混合料性能的影响规律,基于3种不同类型的AC-20混合料级配类型,分别采用马歇尔法和旋转压实法制备AC-20混合料试样,测试其高温稳定性、低温抗裂性和水稳定性,分析压实方式对AC-20混合料性能的影响规律。结果表明,随着压实次数增加,AC-20混合料的最佳油石比呈现逐渐降低的趋势;而相同压实次数下,使用旋转压实法制备的混合料的最佳油石比略小于使用马歇尔法制备的混合料的最佳油石比;经压实125次制备的试样的马歇尔稳定度、动稳定度、抗弯拉强度、破坏应变以及冻融劈裂强度比,相较压实次数75次的试样分别提升了20%、18%、4%、3%和2%;相同压实次数下,旋转压实法制备的试样的马歇尔稳定度、动稳定度、抗弯拉强度、破坏应变以及冻融劈裂强度比,相对于压实次数75次的试样分别提升了13%、15%、10%、5%和2%。
In order to compare and analyze the influence law of different compaction methods on the performance of AC-20 asphalt mixture,AC-20 mixture samples with different gradation types are prepared by Marshall method and gyratory compaction method respectively.Then the high-temperature stability,low-temperature crack resistance and water stability of asphalt mixture are tested,and the influence law of compaction methods on the performance of AC-20 mixture is analyzed.The results show that with the increase of compaction times,the optimal asphalt aggregate ratio of AC-20 mixture gradually decreases,while under the same compaction times,the optimal asphalt aggregate ratio of gyratory compaction method is slightly less than that of Marshall compaction method;Compared with the samples prepared with 75 times Marshall compaction number,the Marshall stability,dynamic stability,flexural tensile strength,failure strain and freeze-thaw splitting strength ratio of the samples prepared with 125 times Marshall compaction number increased by 20%,18%,4%,3%and 2%respectively;Under the same compaction times,the Marshall stability,dynamic stability,flexural tensile strength,failure strain and freeze-thaw splitting strength ratio of the samples prepared by gyratory compaction method are increased by 13%,15%,10%,5%and 2%respectively compared with the samples prepared with 75 times Marshall compaction number.
作者
曹检云
高凯凯
CAO Jianyun;GAO Kaikai(Changsha Planning&Design Institude Co.,Ltd.,Changsha 410125,China;China Academy of Transportation Science,Beijing 100029,China;Highway Engineering Technology(Beijing)of CATS Co.,Ltd.,Beijing 100088,China)
出处
《现代交通技术》
2022年第3期29-33,共5页
Modern Transportation Technology
