滨海地区SMA-13沥青混合料低温抗裂性能  

Study on Low Temperature Crack Resistance of SMA-13 Asphalt Mixture in Coastal Area

作　　者：胡琰琰 吴金荣[1,2] 金情芬 赵文竹 HU Yanyan;WU Jinrong;JIN Qingfen;ZHAO Wenzhu(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China;Engineering Research Center of Underground Mine Construction,Ministry of Education,Huainan 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]矿山地下工程教育部工程研究中心,安徽淮南232001

出　　处：《洛阳理工学院学报（自然科学版）》2024年第1期27-34,共8页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：国家自然科学基金项目(2022CX2039)。

摘　　要：选用聚酯纤维作为外掺剂,干法制备聚酯纤维掺量为0%、0.3%、0.35%、0.4%、0.45%、0.5%的SMA-13半圆试件,分别开展0、2、4、6、8次硫酸钠-干湿循环下半圆弯曲(SCB)试验,并以清水-干湿循环作为平行对照组。随着干湿循环次数的增加,盐-干湿循环试件组和平行对照组试件的低温性能均降低;盐-干湿循环对试件的影响>清水-干湿循环对试件的影响,且清水-干湿循环后试件的低温性能劣化幅值较小;聚酯纤维掺量为0.4%的试件宏观评价指标断裂韧性KIC在各溶液干湿循环条件下均有较好表现,且实测数据均高于其他掺量纤维。结合SEM扫描电镜试验可知,掺量为0.4%的聚酯纤维能形成较好的纤维网状搭接结构,有利于试件整体性的提升和荷载的均匀传递。The paper selects polyester fiber as an admixture and prepares SMA-13 semi-circular specimens with polyester fiber content of 0%,0.3%,0.35%,0.4%,0.45%and 0.5%.The lower semi-circular bending test of sodium sulfate-dry-wet cycle is carried out at different times,0,2,4,6,8 respectively.And the dry-wet cycle of water is used as a parallel control group.With the increase of the times of dry-wet cycles,the low temperature performance of the salt-dry-wet cycle specimen group and the parallel control group decrease;salt-dry-wet cycle has more effect on the specimen than water-dry-wet cycle,and the low temperature performance degradation amplitude of the specimen after water-dry-wet cycle is small.The macro evaluation index KIC of polyester fiber specimens with 0.4%content has good performance under the condition of dry-wet cycle of each solution,and the measured data are higher than those of other fibers.Combined with the SEM scanning electron microscope test,the polyester fiber with a content of 0.4%can form a better fiber mesh lap structure,conducive both to the improvement of the integrity of the specimen and to the uniform transmission of load.

关 键 词：沥青混合料 低温抗裂性能 SCB试验 SEM扫描电镜试验 

分 类 号：U414[交通运输工程—道路与铁道工程] TP311.5[自动化与计算机技术—计算机软件与理论]