摘要
为探讨纳米碳粉/橡胶粉复合改性沥青的性能变化、影响因素及制备工艺,采用物理性能试验确定了改性沥青的单配最佳掺量,运用正交试验法获得了不同掺量、反应时间、反应温度、剪切转速、发育温度和发育时间下纳米复合改性沥青的物理性能指标,进而借助灰关联分析法,计算出各项评价指标所占权重,将多指标转化为单指标,并结合极差和方差分析评价了纳米复合改性沥青最佳制备工艺。结果表明:纳米碳粉及橡胶粉的单配最佳掺量分别为2%和18%,改性效果均较基质沥青有所提高;各因素对沥青物理性能的影响程度依次为:复配比例>反应温度>发育时间>发育温度>反应时间>剪切转速,对比F值,得到复配比例对改性效果影响非常显著,其余因素均为显著影响;在综合评分指标下2%纳米碳粉/18%橡胶粉复合改性沥青物理性能最为优异,其最佳制备工艺为:剪切转速3500 r/min、反应温度190℃、反应时间60 min、发育温度170℃及发育时间60 min。
In order to investigate the performance change,influencing factors and preparation process of nano-carbon powder/rubber powder composite modified asphalt,the best preparation of single-modified asphalt was determined by physical property test,and the physical properties of the nano-composite modified asphalt under different dosages,reaction time,reaction temperature,shearing speed,development temperature and development time were obtained by orthogonal test,and calculate the weight of each evaluation index by means of gray correlation analysis method,and convert multiple indicators into a single,the best preparation process of nano composite modified asphalt was evaluated by the combination of range and variance analysis.The results show that the optimum blending ratio of nano-carbon powder and rubber powder are 2%and 18%,and the modification effect is improved compared with matrix asphalt.The influence degree of each factor to physical properties is:compound ratio>reaction temperature>development time>development temperature>reaction time>shearing speed,the compounding ratio has a very significant effect on the modification effect,and other factors are significant effects by compared with F value;the physical performance of 2%nano-carbon powder/18%rubber powder composite modified asphalt is best under the comprehensive scoring index,the optimum preparation process is:shearing speed 3500 r/min,reaction temperature 190℃,reaction time 60 min,development temperature 170℃and development time 60 min.
作者
孟旭
谢祥兵
李广慧
张攀
栗鹏
赵文辉
MENG Xu;XIE Xiang-bing;LI Guang-hui;ZHANG Pan;LI Peng;ZHAO Wen-hui(School of Civil Engineering and Architecture,Zhengzhou University of Aeronautics,Zhengzhou 450046,China)
出处
《硅酸盐通报》
CAS
北大核心
2019年第8期2642-2649,共8页
Bulletin of the Chinese Ceramic Society
基金
国家自然科学基金(51378474)
中原科技创新领军人才项目(194200510015)
河南省科技攻关项目(192102310012)
河南省高等学校重点科研项目计划(19A560024)
郑州航院研究生教育创新计划基金(2019CX24)
关键词
正交试验
反应温度
发育时间
评价指标
orthogonal test
reaction temperature
development time
evaluation index
