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.
作者
胡琰琰
吴金荣
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)
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)。
关键词
沥青混合料
低温抗裂性能
SCB试验
SEM扫描电镜试验
asphalt mixture
low temperature crack resistance
SCB test
SEM scanning electron microscope test
