摘要
为了研究沥青旋转黏度与粘附性的相关关系,首先基于表面能理论,借助光学接触角测量仪,测量了原样、RTFOT后、PAV后SBS改性沥青和集料的接触角,利用粘附功计算公式,计算了3种沥青与集料间的粘附功,通过分析发现石灰岩与3种沥青的粘附功均最大,其次是玄武岩,最小的为花岗岩,RTFOT使SBS改性沥青与集料的粘附功降低3.0%;PAV使RTFOT后SBS改性沥青与集料的粘附功降低9.2%;同时,使用旋转黏度计测试了不同温度、不同转速和不同转子下3种沥青的旋转黏度,建立了沥青旋转黏度与粘附性的相关关系,研究表明,沥青旋转黏度与粘附性在135℃和175℃时呈良好负相关性,相关系数在0.92以上,温度为95℃时两者的负相关性相对均较差,相关系数在0.68以下。
In order to study the correlation between rotational viscosity and adhesion of asphalt,firstly,based on the theory of surface energy,with the help of an optical contact angle measuring instrument,the contact angles of the original,post-RTFOT,and post-PAV SBS modified asphalt and aggregates were measured,respectively.Using the calculation formula of adhesion work,the adhesion work between the three asphalt and aggregate was calculated.It is found that the adhesion work between limestone and the three asphalts is the largest,followed by basalt,and granite is the smallest.After RTFOT aging,the adhesion work between asphalt and aggregate decreases by 3.0%;after PAV aging,the adhesion work between asphalt after RTFOT aging and aggregate decreases by 9.2%.At the same time,the rotational viscosities of three asphalts with different temperatures,different speeds,and different rotors were tested using a rotational viscometer,and the correlation between asphalt viscosity and adhesion was established.The experimental results show that the rotational viscosity and adhesion have a good negative correlation at 135℃and 175℃,the correlation coefficient is above 0.92,and the temperature is 95℃.At this time,the negative correlation between the two is relatively poor,and the correlation coefficient is below 0.68.
作者
洪岭岭
冯国杰
孙雪阳
HONGLing ling;FENG Guo-jie;SUN Xue-yang(Henan Provincial Communications Planning&Design Institute Co Ltd,Zhengzhou 450000,China;Shijiazhuang Rail Transit Co Ltd,Shijiazhuang 056000,China;Xuhui Design Co Ltd,Zhengzhou 450000,China)
出处
《武汉理工大学学报》
CAS
北大核心
2020年第5期24-31,共8页
Journal of Wuhan University of Technology
关键词
沥青
表面自由能理论
粘附性
粘附功
旋转黏度
asphalt
surface free energy theory
adhesion
adhesion work
rotational viscosity
