Effects of microfiller on the rheological behavior and structure of SBS modified bitumen

7th Global Conference on Materials Science and Engineering

工业技术（总论）;材料科学

Zhou, L.M.^1 ; Xia, T.^1 ; Xu, J.H.^2^3 ; Qin, Y.P.^1 ; Chen, W.Q.^1 ; Dai, J.F.^1^3

College of Material Science and Engineering, Chongqing Key Laboratory of Mold Technology, Chongqing University of Technology, Chongqing

400054, China^1

College of Polymer Science and Engineering, Sichuan University, Chengdu

610065, China^2

Chongqing Zhixiang Paving Technology Engineering Co. Ltd., China Merchants Chongqing Communications Technology Research and Design Institute, Chongqing

401336, China^3

关键词: Chemical compositions;    Interfacial areas;    Phase separation structure;    Rheological behaviors;    Rheological property;    Sbs modified bitumens;    Structure correlations;    Styrene butadiene styrenes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/474/1/012013/pdf
DOI  :  10.1088/1757-899X/474/1/012013

来源: IOP

【 摘 要 】

Rheological behavior of styrene-butadiene-styrene (SBS) modified bitumen with the presence of micro glass bead (GB) is investigated. It is found that either the GB fraction or size can influence the rheological property of bitumen/SBS/GB blends. Phase separation structures in all the modified bitumen systems keep a droplet-matrix type due to the sizeable compositional asymmetry between SBS-rich phase and bitumen-rich phase. The difference in the interfacial area fraction, obtained by Image J analysis reflects the effect of GB size on the rheological property. Further study on the rheology-structure correlation is put special attention on bee structure (catana phase) measured by AFM. It is found that the ratio of specific amplitude to the wavelength (α0/λ0) of a bee-like structure may be a valid indicator of stiffness for the modified bitumen concerning the effect of GB size difference on the rheological property. When the chemical composition is the same, the lower value of α0/λ0 indicates the modified bitumen with higher stiffness.