纳米TiO_(2)改性沥青胶结料性能研究  

Performance investigation of nano TiO_(2)particle modified asphalt binder

作　　者：王亚平 赖雄 盛旭 林国章 谭毅 宋小金 WANG Yaping;LAI Xiong;SHENG Xu;LIN Guozhang;TAN Yi;SONG Xiaojin(Hunan Huacheng Testing Technology Co.,Ltd.,Hunan Changsha 410017 China)

机构地区：[1]湖南华城检测技术有限公司,湖南长沙410017

出　　处：《山东交通科技》2022年第4期91-92,112,共3页

摘　　要：从常规物理性能和抗热氧老化性能方面评价了不同掺量下纳米TiO_(2)微粒对不同标号基质沥青的改性作用,并基于改性规律得出纳米TiO_(2)微粒的适宜掺量范围。结果表明,沥青的软化点、黏度随纳米TiO_(2)掺量的增加而单调增长,针入度和延度呈相反趋势;纳米TiO_(2)可提高沥青的抗老化性。通过对纳米改性沥青的物理和抗老化性能考虑,纳米TiO_(2)的最佳掺量为2%~3%。This study evaluated the modifying effect of different nano TiO_(2) dosage on conventional physical performance,and thermal oxidation aging resistance of base asphalt.The results indicate that as the dosage of nano TiO_(2) increases,the softening point and viscosity of base asphalt continuously rise while the penetration and ductility decline.The addition of nano TiO_(2) is able to improve the thermal oxidation aging resistance.Based on comprehensively modifying effect,the optimal dosage range is determined as 2%to 3%.

关 键 词：改性沥青 纳米TiO_(2) 感温性能 热氧老化 改性作用 

分 类 号：U416.217[交通运输工程—道路与铁道工程]