Open AccessSelection of Mechanical Design Indexes for Supporting Layer Based on Sensitivity of Asphalt Content
Author(s) -
Jian Wang,
Wei Zhuang,
Hao Chen,
Sai Chen,
Yi Bi,
Hongchao Zhang
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/267/4/042090
Subject(s) - asphalt , resilience (materials science) , materials science , dynamic modulus , composite material , modulus , compressive strength , shear modulus , asphalt concrete , geotechnical engineering , structural engineering , dynamic mechanical analysis , engineering , polymer
In order to optimize the mechanical design index of asphalt pavement supporting which is sensitive to asphalt content, the mechanical parameters (dynamic modulus, compressive resilience modulus, compressive strength, shear strength, splitting strength and failure strain) of AC-20 mixture are selected as the research object, and the changes of these parameters with asphalt content are analyzed. The sensitivity of each parameter to asphalt consumption was analyzed by one-way ANOVA. The results show that the dynamic modulus and failure strain of asphalt mixture increase first and then decrease regularly with the increase of asphalt content, and the change of dynamic modulus is independent of loading frequency. However, the change of compressive strength, resilient modulus, shear strength and splitting strength is not significant with the increase of asphalt content. Dynamic modulus is most responsive to asphalt content under different asphalt types and gradations. Hence, it is suggested that dynamic modulus should be considered as the mechanical design index of load-bearing of asphalt pavement.