Molecular Dynamics Study on Compatibility of Asphalt and Rubber Powders before and after Aging

被引：0
|
作者：
Wang L. [1 ]
Zhang L. [1 ]
Liu Y. [1 ]
机构：
[1] School of Civil Engineering, Inner Mongolia University of Technology, Hohhot
来源：
Jianzhu Cailiao Xuebao/Journal of Building Materials | 2019年 / 22卷 / 03期
关键词：
Aging asphalt; Compatibility; Molecular dynamics; Rubber powder modified asphalt;
D O I：
10.3969/j.issn.1007-9629.2019.03.021
中图分类号：
学科分类号：
摘要：
In order to investigate the effect of heat aging on the compatibility between asphalt and rubber powder, the long-term aging asphalt was prepared by pressure aging vessel(PAV) accelerated aging test method, four-component analysis was carried out on the matrix asphalt and the aging asphalt. Based on above experimental results, the rubber powder representative molecular model was established using styrene-butadiene rubber(SBR) molecular model. The results show that the density of asphalt does not change significantly before and after aging, but the energy increases due to the increase of macromolecule ratio in asphalt after aging. The difference between the solubility parameter of aging asphalt and SBR is larger than the difference of solubility parameter between matrix asphalt and SBR. Indicating that aging reduces the mutual dissolution ability and the interaction energy between asphalt and SBR, ultimately reduces the compatibility between the asphalt and the SBR. © 2019, Editorial Department of Journal of Building Materials. All right reserved.
引用
收藏
页码：474 / 479
页数：5
相关论文
共 12 条
  • [1] Effect of aging on rheological properties of crumb rubber and SBS modified asphalt, Journal of Building Materials, 18, 3, pp. 499-504, (2015)
  • [2] He L., Ma Y., Ling T., Et al., Analysis on crumb rubber modified asphalt and its aging characteristics on microscale, Journal of Functional Materials, 46, 21, pp. 21093-21098, (2015)
  • [3] Xu G., Wang H., Molecular dynamics study of oxidative aging effect on asphalt binder properties, Fuel, 188, pp. 1-10, (2017)
  • [4] Wang H., Lin E., Xu G., Molecular dynamics simulation of asphalt-aggregate interface adhesion strength with moisture effect, International Journal of Pavement Engineering, 18, 5, pp. 414-423, (2017)
  • [5] Wang L., Zhang L., Liu Y., Study on compatibility of rubber powder and asphalt in rubber powder modified asphalt by molecular dynamics, Journal of Building Materials, 21, 4, pp. 689-694, (2018)
  • [6] Xiao Y., Li C., Wan M., Et al., Study of the diffusion of rejuvenators and its effect on aged bitumen binder, Applied Sciences, 7, 4, (2017)
  • [7] Ding Y., Huang B., Shu X., Et al., Use of molecular dynamics to investigate diffusion between virgin and aged asphalt binders, Fuel, 174, pp. 267-273, (2016)
  • [8] Artok L., Su Y., Hirose Y., Et al., Structure and reactivity of petroleum-derived asphaltene, Energy and Fuels, 13, 2, pp. 287-296, (1999)
  • [9] Storm D.A., Sheu E.Y., Detar M.M., Macro structure of asphaltenes in vacuum residue by small-angle X-ray scattering, Fuel, 72, 7, pp. 977-981, (1993)
  • [10] Kowalewski I., Vandenboucke M., Huc A.Y., Et al., Preliminary results on molecular modeling of asphalt enesusing structure elucidation programs in conjunction with molecular simulation programs, Energy and Fuels, 10, 1, pp. 97-107, (1996)
12