摘要
采用热分析动力学的方法确定了环氧体系的固化反应为自催化反应类型,利用非线性回归建立了环氧体系的固化反应模型,计算得到环氧体系的反应为1级与n级平行的自催化反应。根据其固化反应模型推算出了不同温度程序下环氧体系的反应时间和反应程度,从而为环氧沥青混凝土的施工以及最终开放交通的时间提供了重要的依据。研究结果表明,温度的升高可以大大缩短环氧体系的固化时间,建议在气温较高的季节进行施工;环氧体系完全固化所需的时间约为固化反应程度达到80%所需时间的3倍。结合马歇尔试验结果可知,当固化反应程度达到80%时,环氧沥青混凝土已具有较高强度,可以开放交通;当外界温度为30℃左右时,约需60 d可以达到80%的固化反应程度,进而可以开放交通。
By using thermal analysis kinetics, the solidification reaction of epoxy system was determined as the self-catalyzed reaction type.The curing reaction model was set up by nonlinear regression.The reaction of epoxy system is a two-step reaction.The first step is a first-level reaction and the second is an n-level one.According to this model, the reaction time and reaction extent of epoxy system under different temperature processes were calculated. The results show that （ 1 ） temperature rising can greatly shorten the curing time of epoxy system, so it is advised to execute the works at higher-temperature season; （2） the time for the epoxy system completely cured is almost three times as the time of reaction extent reaches 80 percent; （3） with the combination of Marshall stability tests results, when the reaction extent reaches 80 percent, the Marshall stability value nearly reaches 40 kN, which shows the epoxy asphalt concrete has a higher strength at this time and it is recommended to open the traffic; （4） when the ambient temperature is 30℃ or so, it needs about 60 days for reaction extent reaching 80 percent, and thus the traffic could be opened.
出处
《公路交通科技》
CAS
CSCD
北大核心
2008年第7期17-20,共4页
Journal of Highway and Transportation Research and Development
基金
江苏省交通科学研究计划资助项目(08r)
关键词
道路工程
固化反应
热分析动力学
环氧沥青混凝土
road engineering
cure reaction
thermal analysis kinetics
epoxy asphalt concrete
