摘要
在不同老化温度和老化时间下,对温拌沥青、基质沥青进行了老化试验,测试了老化前后沥青中正戊烷沥青质含量,建立了以正戊烷沥青质含量为参数的老化动力学模型,计算了老化反应速率常数和老化反应活化能等参数,据此对比研究了温拌沥青与基质沥青的老化动力特性.研究结果表明:沥青老化遵循一级反应动力学方程,老化过程中正戊烷沥青质含量均随时间的延长和温度的升高而增大,而温拌沥青具有较低的反应速率常数和较高的反应活化能,因此抗老化性能更好.以正戊烷沥青质含量为参数的老化动力学方程,能够较好地区分温拌沥青与基质沥青老化过程的差异.
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.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第5期1068-1071,共4页
Journal of Southeast University：Natural Science Edition
基金
陕西省自然科学基础研究计划资助项目(2014JQ7278)
教育部博士点基金新教师资助项目(20110205120002)
霍英东教育基金青年教师资助项目(131075)
中央高校基本科研业务费专项资金资助项目(CHD2012JC002)
关键词
温拌沥青
老化动力学
正戊烷沥青质
反应速率常数
反应活化能
warm mix asphalt
aging kinetics
n-pentane asphaltene
reaction constant
reaction activation energy
