Aging kinetics characteristics of warm mix asphalt based on n-pentane asphaltene

作者：Zhang Jiupeng^*; Du Hui; Pei Jianzhong; Xu Shicui

来源：Journal of Southeast University(Natural Science Edition), 2014, 44(5): 1068-1071.

DOI：10.3969/j.issn.1001-0505.2014.05.034

• Aging kinetics
• Aging process
• Aging temperatures
• Anti-aging properties
• First order kinetics
• N-Pentane asphaltene
• Reaction equations
• Warm mix asphalts

The aging tests of warm mix asphalt and matrix asphalt were conducted at different aging temperatures and time, and the contents of n-pentane asphaltene in asphalt were measured before and after aging. By taking the content of n-pentane asphaltene as the parameter, the aging kinetics models were established, and the reaction constants and reaction activation energies were calculated to contrastively analyze the aging kinetics characteristics of warm mix asphalt and matrix asphalt. Results indicate that the aging process of the two asphalts follows the first-order kinetics reaction equation, and the content of n-pentane asphaltene increases with the aging temperature and the aging time. The reaction constant of warm mix asphalt is lower than that of matrix asphalt, but the reaction activation energy of warm mix asphalt is bigger than that of matrix asphalt, so the anti-aging property of warm mix asphalt is better. The aging kinetics models based on the content of n-pentane asphaltene can be used to well distinguish the difference of aging processes between warm mix asphalt and matrix asphalt.

• 出版日期2014