河南科技大学学报（自然科学版）2024，Vol.45Issue(1)：35-42,50,9.DOI:10.15926/j.cnki.issn1672-6871.2024.01.005
冻融循环下纤维增韧型环氧沥青混合料损伤演化
Damage Evolution of Fiber Reinforced Epoxy Asphalt Concrete under Freeze-thaw Action
摘要
Abstract
In order to investigate the basalt fiber reinforced epoxy asphalt concrete deterioration law in the seasonal frozen region,firstly,the fiber length and content were preliminarily calculated by using the asphalt viscosity-temperature curve analysis and direct tensile performance test.The road performance of epoxy asphalt concrete's(EAC)was compared before and after the fiber modification,the most suitable fiber length and content were further assessed,to form the design process of basalt fiber reinforced epoxy asphalt concrete(FEAC).The flexural tensile strength,flexural tensile strain,flexural stiffness modulus,and flexural strain energy density of asphalt concrete with various degrees of freeze-thaw damage were evaluated in low-temperature bending tests.The results show that FEAC with 6％(mass fraction)basalt fiber content has better high-temperature performance and low-temperature cracking resistance,and maintain comparable water stability to EAC.The flexuraltensile strength,flexural stiffness modulus and flexural strain energy density of EAC and FEAC gradually decrease with the increase of the number of freeze-thaw cycles,while the flexuraltensile strain shows the opposite trend.Compared with EAC,FEAC shows higher flexural strength,flexural tensile strain and lower flexural stiffness modulus.The flexural strain energy density of both FEAC and EAC show an obvious three-stage performance decrease with freeze-thaw damage changes.The s-shaped logistic function can adequately explain the damage change rule of freeze-thaw cycles,the model parameters a,k,and xc show positive contribution on slowing down the rise of of freeze-thaw damage of EAC.关键词
环氧沥青混合料/冻融循环/玄武岩纤维/损伤变量Key words
epoxy asphalt concrete/freeze-thaw cycles/basalt fiber/damage variable分类
交通工程引用本文复制引用
艾贤臣,胡帮艳,冉武平,呙玉昊,满长恒..冻融循环下纤维增韧型环氧沥青混合料损伤演化[J].河南科技大学学报（自然科学版）,2024,45(1):35-42,50,9.基金项目
国家自然科学基金项目(51768070) （51768070）
新疆维吾尔自治区自然科学基金项目(2021D01C117,2022D01C396) （2021D01C117,2022D01C396）
新疆极干旱区公路路基路面病害预防及关键技术研究(65000022859700220241) （65000022859700220241）
