[1]李悦,张艳君,曹东伟,等.干法环氧沥青固化行为及其混合料性能评价[J].长安大学学报(自然科学版),2020,40(1):58-67.
　LI Yue,ZHANG Yan jun,CAO Dong wei,et al.Curing behavior of dry method epoxy asphalt andits mixture performance[J].Journal of Chang’an University (Natural Science Edition),2020,40(1):58-67.
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干法环氧沥青固化行为及其混合料性能评价
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第40卷
期数:
2020年1期
页码:
58-67
栏目:
道路工程
出版日期:
2020-01-15

文章信息/Info

Title:
Curing behavior of dry method epoxy asphalt and
its mixture performance
作者:
李悦; 张艳君; 曹东伟; 贾晓鹏; 杜荣杰; 董锐
1. 重庆交通大学 土木工程学院，重庆 400074； 2. 中路高科（北京）公路技术有限公司，北京 100088；
3. 中路交建（北京）工程材料技术有限公司，北京 100088； 4. 齐鲁交通发展集团有限公司，山东 济南 250000
Author(s):
LI Yue1; 2;  ZHANG Yanjun3;  CAO Dongwei2;  JIA Xiaopeng3; DU Rongjie4;  DONG Rui4
1. School of Civil Engineering， Chongqing Jiaotong University， Chongqing 400074， China； 2. Zhonglu Gaoke<br />(Beijing) Road Technology Co., Ltd.， Beijing 100088， China； 3. Zhonglu Jiaojian (Beijing) Engineering<br />Materials Technology Co., Ltd.， Beijing 100088， China； 4. Qilu Transportation Development<br />Group Co., Ltd., Jinan 250000， Shandong， China
关键词:
道路工程; 固化行为; 混合料性能; 差示扫描量热; 室内试验; 干法环氧
Keywords:
road engineering;  curing behavior;  mixture performance;  differential scanning calorimetry;  laboratory test;  dry method epoxy
文献标志码:
A
摘要:
为了解决传统环氧沥青稳定性差、易离析、需现场制备、应用要求严格以及应用工序复杂等问题，对一种自制干法环氧材料及其混合料性能进行研究评价。采用光学显微镜观察干法环氧材料与沥青比例分别为1∶2、1∶3、1∶4时的分散性，并观察最优比例下干法环氧沥青的固化状态；采用非等温差示扫描量热（DSC）试验分析其固化行为，以及不同固化时间材料的固化程度，应用DoseResp模型拟合出固化程度与时间的关系曲线；通过固化行为分析，初步确定混合料养生温度及时间，并对混合料性能进行研究。研究结果表明：当干法环氧材料与沥青比例为1∶3时，其分散密集且无明显结团现象，在150 ℃条件下随着时间增长，逐渐形成稳定的网状交联结构；不同升温速率条件下，升温速率越高，固化热越小，固化反应越不充分；通过Kissinger方程和Ozawa方程计算该干法环氧材料的固化反应近似1级反应，反应放热集中且容易进行；DoseResp模型对干法环氧材料固化反应转化百分率的拟合精度较高，在实际应用中可以通过该拟合模型初步判断其固化程度，对研究和应用中时间控制有较好的指导作用；干法环氧沥青混合料马歇尔稳定度可达53.34 kN；60 ℃车辙动稳定度可达42 000次，70 ℃车辙动稳定度可达25 200次；冻融劈裂强度比大于100%；浸水残留稳定度大于90%；低温弯曲性能满足要求。
Abstract:
In order to solve the problems of poor stability, easy segregation, onsite preparation, strict application requirements and complicated application procedures of epoxy asphalt and its mixture,  the performance of a selfmade dry epoxy material and its mixture was studied. At first, the dispersity of dry epoxy material and asphalt with optical microscope were observed when the ratios were 1∶2, 1∶3 and 1∶4, then the best ratio for the curing state of dry epoxy asphalt was found. Nonisothermal DSC test was used to analyze the curing behavior and the curing degree of materials with different curing times. DoseResp model was used to make the relationship curve between the curing degree and time. The temperature and time of mixed material to maintain health through the curing behavior were determined preliminarily and the mixture performance was studied. The results show that when the ratio of dry epoxy material to asphalt is 1∶3, the dispersion is dense and there is no obvious agglomeration phenomenon, and a stable network crosslinked structure is gradually formed with the increase of time at 150 ℃. Under different heating rates, the higher the heating rate, the lower the curing heat and the less full the curing reaction. The curing reaction of the dry epoxy material is calculated approximate the firstorder reaction, which is heat concentrated and easy to carry out, by Kissing equation and Ozawa equation. DoseResp model has a high accuracy in fitting the convension percentage of the curing reaction of the dry epoxy material. In practical application, the model can be used to preliminarily determine the degree of solidification, which has a good guiding effect on time control in research and application. Marshall stability of the dry epoxy asphalt mixture can reach 53.34 kN, the dynamic stability of rut at 60 ℃ can reach 42 000 times, and that at 70 ℃ can reach 25 200 times, and the freezethaw strength ratio is greater than 100%, residual stability of immersion is greater than 90%, low temperature bending performance meets the requirements.
 7 tabs, 8 figs, 27 refs.

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更新日期/Last Update: 2020-01-17