TY - JOUR
T1 - Influence of microstructure evolution of bitumen on its micromechanical property by finite element simulation
AU - Du, Cong
AU - Liu, Pengfei
AU - Ganchev, Kaloyan
AU - Lu, Guoyang
AU - Oeser, Markus
N1 - Funding Information:
This paper is based on a part of the research project carried out at the request of the German Research Foundation , DFG (research project No. FOR 2089/2, OE514/1-2) and Excellence Strategy of the German Federal and State Governments (research project No. StUpPD373-20). The authors are solely responsible for the content.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/7/26
Y1 - 2021/7/26
N2 - The microstructure variation plays an essential role in the micro-mechanical performance of the bitumen and the macro-mechanical behavior of asphalt mixtures. This research aims to reveal the influence of the microstructure changes of bitumen on its micromechanical responses. Based on atomic force microscopy (AFM) technology, the microstructure (bee structure: bee, peri, and interstitial phases) of the bitumen was detected. With the self-developed microstructural finite element (FE) models, the micromechanical responses of bitumen with different bee structures were comprehensively simulated. The results show that the computational load-bearing capacity of the bitumen increases with an increase of the peri phase content, but the difference is not significant. The development of high stresses within the bee phase is mainly due to the inhomogeneity of the material. Additionally, the distribution of the tensile strain becomes more homogeneous with the increase of the peri phase content. This research contributes to establishing a better understanding of the relationship between the microstructure of the bitumen and its micromechanical properties.
AB - The microstructure variation plays an essential role in the micro-mechanical performance of the bitumen and the macro-mechanical behavior of asphalt mixtures. This research aims to reveal the influence of the microstructure changes of bitumen on its micromechanical responses. Based on atomic force microscopy (AFM) technology, the microstructure (bee structure: bee, peri, and interstitial phases) of the bitumen was detected. With the self-developed microstructural finite element (FE) models, the micromechanical responses of bitumen with different bee structures were comprehensively simulated. The results show that the computational load-bearing capacity of the bitumen increases with an increase of the peri phase content, but the difference is not significant. The development of high stresses within the bee phase is mainly due to the inhomogeneity of the material. Additionally, the distribution of the tensile strain becomes more homogeneous with the increase of the peri phase content. This research contributes to establishing a better understanding of the relationship between the microstructure of the bitumen and its micromechanical properties.
KW - AFM
KW - Bitumen
KW - Micromechanical property
KW - Microstructure characteristics
UR - http://www.scopus.com/inward/record.url?scp=85105581275&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2021.123522
DO - 10.1016/j.conbuildmat.2021.123522
M3 - Journal article
AN - SCOPUS:85105581275
SN - 0950-0618
VL - 293
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 123522
ER -