摘要
采用熔融共混法,以克拉玛依90#沥青为原料,Mg-Al水滑石(LDHs)与废橡胶粉(CR)作为改性剂,制备了具有抗紫外老化性能的水滑石/废胶粉复合改性沥青(LDHs/CRMA),并对其软化点、针入度指数(PI)、延度进行了测试。通过Hassan数学方法将三个指标"归一化"得到总评"归一值",采用响应面分析法建立总评"归一值"与各因素之间的Box-Behnken数学模型,得到了LDHs/CRMA的最优制备工艺条件为:剪切温度173℃、剪切时间89 min、剪切速率3500 r/min。通过紫外老化模拟实验对复合改性沥青的抗老化性能进行了评价,结果表明,引入水滑石可以减少沥青老化过程中含氧官能团的产生,抗紫外老化性能得到了明显提高。
Mg-Al layer double hydroxides(Mg-Al LDHs) modified asphalt was prepared by melt blending with Karamay asphalt and waste crumb rubber(CR), which has UV aging resistance. The physical properties including softening point, penetration index(PI), ductility were tested, and the three indicators were "normalized" into overall desirability by Hassan overall desirability and affecting factors was established, and the technology of preparing composing LDHs/CRMA was optimized. The optimum preparation conditions were: shear temperature 173℃, shear time 89 min, and shear rate 3500 r/min. The aging resistance of composite modified asphalt was evaluated by UV aging simulation test. The FT-IR and SEM revealed that the introduction of LDHs can reduce the production of oxygen-containing functional groups during asphalt aging, and the anti-UV aging performance was improved.
作者
鲁玉莹
余黎明
杨加可
曾武松
陆江银
LU Yuying;YU Liming;YANG Jiake;ZENG Wusong;LU Jiangyin(Key Laboratory of Oil&Gas Fine Chemicals,Ministry of Education,College of Chemistry and Chemical Engineering,Xinjiang University,Urumqi 830046,Xinjiang,China;Bei-xin Si-fang Engineering Testing and Consulting Co.Ltd.,Urumqi 830018,Xinjiang,China)
出处
《化工学报》
EI
CAS
CSCD
北大核心
2020年第3期1362-1369,共8页
CIESC Journal
基金
国家自然科学基金项目(21968034)
兵团十一师师域科技计划项目(2018BB027)。
关键词
制备
改性沥青
数学模拟
响应面法
优化
抗紫外老化
preparation
modified asphalt
mathematical modeling
response surface methodology
optimization
anti-UV aging
