[1]丁湛,蒋修明,赵浚凯,等.橡胶沥青粘度影响因素及粘流特性分析[J].郑州大学学报(工学版),2019,40(03):11.
 Analysis of viscosity influencing factors and viscous flow properties for rubber asphalt[J].Journal of Zhengzhou University (Engineering Science),2019,40(03):11.
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橡胶沥青粘度影响因素及粘流特性分析()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
40
期数:
2019年03期
页码:
11
栏目:
出版日期:
2019-04-30

文章信息/Info

Title:
Analysis of viscosity influencing factors and viscous flow properties for rubber asphalt
作者:
丁湛蒋修明赵浚凯栗培龙陈冲
文献标志码:
A
摘要:
为了研究橡胶沥青的粘度影响因素以及粘流特性,制备了不同胶粉掺量、不同混合反应温度和时间条件下的橡胶沥青(RA),采用布洛克菲尔德粘度计分别测试180℃旋转粘度,分析胶粉掺量、混合温度以及处理时间对RA粘度的影响,并采用采用Arrhenius方程计算橡胶沥青的粘流活化能E_η,并分析E_η的变化规律。结果表明, 橡胶沥青的粘度与胶粉掺量符合指数增长模型,适当提高处理温度和延长处理时间对橡胶沥青粘度具有一定的等效性,处理温度过高或时间过长都可能引起橡胶分子链的降解而导致橡胶沥青的粘度降低。随着胶粉掺量的增大,原样与老化后的橡胶沥青粘流活化能E_η均先增大后减小,在胶粉掺量10%-15%范围内粘流活化能存在峰值,对于相同的胶粉掺量,老化后粘流活化能有所增大。从粘度影响及粘流特性的角度,推荐橡胶粉掺量为15%~25%,处理温度180℃,处理时间90min。
Abstract:
To investigate the influencing factors of viscosity and viscous flow properties of rubber asphalt, rubber asphalt (RA) samples were prepared under different conditions of mixing temperature and processing time for different rubber dosage. Brookfield viscosity tests were carried out on RA samples, and the effect of these factors on viscosity of RA was analyzed. The visco-flow activation energy(Eη)of RA was calculated using Arrhenius equation according to the viscosity values of asphalt under different temperatures. The changing regularity of Eη was analyzed. The results and analysis indicate that the viscosity values of RA increase by the exponential growth model continuously with the increase of rubber content. There is a certain equivalence for rubber asphalt viscosity between raising mixing temperature and extending the processing time. But too high temperature or too much time may lead to excessive degradation of rubber molecules, which will cause the decrease of RA viscosity. With the increase in the dosage of crumb rubber, Eη of RA for origin or aged samples both goes up first and then drops down. And peak Eη exists in the range of rubber content from 10% to 15%. The Eη value of aged RA is bigger than that of original sample for the same rubber dosage. From the consideration of viscosity factors and viscous flow properties, the processing conditions are recommended that the dosage of crumb rubber is 15%~25%, preparation temperature is 180 ℃ and the processing time is 90 min approximately based on this research.
更新日期/Last Update: 2019-04-16