球磨GNPs/SiO_(2)复合改性沥青流变性能和疲劳特性研究  

Research on rheological and fatigue properties of ball-milled GNPs/SiO_(2) composite modified asphalt

作　　者：田旺 王宇航 常亮亮 陈惠坤 牛冬瑜[3] TIAN Wang;WANG Yuhang;CHANG Liangliang;CHEN Huikun;NIU Dongyu(Shaanxi Huashan Road and Bridge Group Co.,Ltd.,Xi’an 710016,China;Shaanxi Huashan Road and Bridge Urban Operation Co.,Ltd.,Xi’an 710028,China;School of Materials Science and Engineering,Chang’an UniverSity,Xi’an 710061,China)

机构地区：[1]陕西华山路桥集团有限公司,陕西西安710016 [2]陕西华山路桥城市运营有限公司,陕西西安710028 [3]长安大学材料科学与工程学院,陕西西安710061

出　　处：《长沙理工大学学报（自然科学版）》2024年第5期53-64,共12页Journal of Changsha University of Science & Technology:Natural Science

基　　金：国家自然科学基金资助项目(51608045);陕西省自然科学基础研究计划资助项目(2024JC-YBMS-374);正诚研发中心科研项目(ZCYF-2023-01-01);陕西省住房城乡建设科技科研开发计划项目(2023-K12)。

摘　　要：【目的】研究石墨烯纳米片(GNPs)和SiO_(2)复合改性沥青的流变性能和疲劳特性。【方法】本文以机械球磨法制备GNPs和SiO_(2)复合改性剂为核心,选取不同掺量的球磨GNPs/SiO_(2)复合改性剂,通过多应力蠕变恢复(multiple stress creep recovery,MSCR)试验、温度扫描试验、频率扫描试验和线性振幅扫描试验,分析球磨GNPs/SiO_(2)复合改性沥青的高温流变特性和疲劳特性,揭示球磨GNPs/SiO_(2)复合改性机理。【结果】球磨GNPs/SiO_(2)复合改性剂的加入,可使高应力水平重复荷载作用下的改性沥青抗变形能力得到明显改善。当复合改性剂掺量达到9‰时,球磨GNPs/SiO_(2)复合改性沥青的抗变形能力显著提高。在低应变水平下,球磨GNPs/SiO_(2)复合改性剂的添加有利于提高沥青的抗疲劳性能。【结论】球磨GNPs/SiO_(2)复合改性沥青相较于单一改性沥青在高应力水平重复荷载作用下的抗变形能力和低应变水平下的抗疲劳性能更优。[Purposes]This paper aims to study the rheological and fatigue properties of graphene nanoplatelets(GNPs)and SiO_(2) composite modified asphalt.[Methods]The preparation of GNPs and SiO_(2) composite modifiers using the mechanical ball milling method was studied.Different amounts of ball-milled GNPs/SiO_(2) composite modifiers were selected.The high-temperature rheological and fatigue properties of ball-milled GNPs/SiO_(2) composite modified asphalt were analyzed through the multiple stress creep recovery(MSCR)test,temperature scanning test,frequency scanning test,and linear amplitude scanning test,revealing the mechanism of ballmilled GNPs/SiO_(2) composite modification.[Findings]The addition of ball-milled GNPs/SiO_(2) composite modifiers can significantly improve the deformation resistance of modified asphalt under repeated loading at high stress levels.When the amount of composite modifiers reaches 9‰,the deformation resistance of ball-milled GNPs/SiO_(2) modified asphalt is significantly improved.At low strain levels,the addition of ball-milled GNPs/SiO_(2) composite modifiers is beneficial for improving the fatigue resistance of asphalt.[Conclusions]Compared with single modified asphalt,ballmilled GNPs/SiO_(2) composite modified asphalt has better deformation resistance under repeated loading at high stress levels and fatigue resistance at low strain levels.

关 键 词：道路建筑材料 球磨 石墨烯纳米片 纳米二氧化硅 复合改性沥青 流变性能 

分 类 号：U414[交通运输工程—道路与铁道工程]