摘要
为研究不同老化程度对不同沥青微观力学特征的影响,使用沥青多功能老化环境控制箱对沥青进行不同程度的光热水耦合老化,并通过原子力显微镜(AFM)对不同老化程度的沥青试样进行试验分析。研究结果表明,基质沥青的纳米硬度和弹性模量等指标随老化时间增加而增加,在老化初期变化幅度较大,随着老化时间的累积变化幅度趋于平稳。从未老化到老化720h,三种不同标号基质沥青的抗老化性能排序为70^(#)>50^(#)>90^(#)。
To study the influence of different aging degrees on the micromechanical characteristics of different asphalt,the asphalt multifunctional aging environment control box was used to implement different degrees of light,heat,and water coupling aging.The asphalt samples with different degrees of aging were tested and analyzed by atomic force microscope(AFM).The research results show that the nano-hardness and elastic modulus of the matrix asphalt increase with the increase of aging time,and the range of changes is greater at the initial stage of aging.With the accumulation of aging time,the range of change tends to be stable.,the anti-aging performance of three different grade matrix asphalts is ranked 70^(#)>50^(#)>90^(#)from no aging to 720 h aging.
作者
张亮
陈禹衡
裴忠实
易军艳
ZHANG Liang;CHEN Yuheng;PEI Zhongshi;YI Junyan(Heilongjiang Provincial Highway Construction Center,Harbin 150000,China;School of Transportation Science and Engineering,Harbin Institute of Technology,Harbin 150006,China)
出处
《低温建筑技术》
2021年第11期71-76,共6页
Low Temperature Architecture Technology
基金
黑龙江交通运输厅科技项目(202101)。
关键词
原子力显微镜
纳米力学
沥青老化
力学特征
atomic force microscope
nano-mechanics
asphalt aging
mechanical characteristics
