摘要
为提升沥青混凝土路面裂缝缺陷的检测性能,分别添加0、0.4%、0.5%、0.6%的石墨烯制备石墨烯-SBS改性沥青,通过改性沥青混合料的单轴压缩实验,分析改性沥青混合料试件压缩过程中电阻率随竖向应变的变化规律,根据电阻率变化状态预估公路的损伤程度。结果表明,在掺入石墨烯且试件表面及内部无裂缝的情况下,平均电阻率为4.395Ω·m,具有良好的导电性;0.5%石墨烯掺量的改性沥青比未添加石墨烯的软化点提高了19.72%,针入度提高了2.47%,石墨烯改性沥青流动性,愈合前后电阻率变化越相近。
This paper aims to improve detection performance of the cracks on asphalt concrete pavement.The study consists of preparing graphene-SBS modified asphalt by adding 0,0.4%,0.5%and 0.6%graphene respectively,analyzing the variation of resistivity with vertical strain in the compression test process of modified asphalt mixture,and estimating highway damage degree according to the variation of resistivity.The results show that the average resistivity of the sample 4.395Ω·m exhibits good electrical conductivity characterized by no cracks on the surface and inside of the sample while adding graphene;the softtening point and penetration point of modified asphaltincreases by 19.72%and by 2.47%respectively with 0.5%graphene content in constrast with no graphalt,the fluidity of graphene modified asphalt and the resistivity are getting more similar before and after healing.
作者
许珊珊
王硕
王鹏
黄学欣
Xu Shanshan;Wang Shuo;Wang Peng;Huang Xuexin(School of Architecture & Civil Engineering, Heilongjiang University of Science & Technology, Harbin 150022, China;Heilongjiang Lusheng Highway Technology Development Co.Ltd., Harbin 150000, China)
出处
《黑龙江科技大学学报》
2022年第3期351-354,共4页
Journal of Heilongjiang University of Science And Technology
基金
黑龙江省自然科学基金优秀青年项目(YQ2019E034)。
关键词
石墨烯
改性沥青
电阻率
压缩变形
graphene
modified asphalt
resistivity
vertical strain
作者简介
第一作者:许珊珊(1981-),女,黑龙江省哈尔滨人,副教授,硕士,研究方向:工程结构设计理论与技术,E-mail:497786409@qq.com。
