不同老化条件对高黏度SBS改性沥青性能的影响
|
摘要
采用几种不同的老化方式,对高粘度SBS改性沥青进行老化后,利用荧光显微镜技术对老化前后的沥青试样进行对比分析。将图像用MATLAB和image-pro plus处理计算后得到一系列相关微观参数。短期老化后SBS的损失比例分别为77.7%(RTFOT)和69.8%(TFOT);长期老化后SBS的损失比例为84.7%(RTFOT+PAV)和85%(TFOT+PAV)。同时,对高粘度SBS改性沥青的宏观指标进行了对比研究,TFOT和RTFOT两种老化方式下高粘度SBS改性沥青的宏观性能会有较为明显的区别:RTFOT老化方式对于沥青的老化程度要高于TFOT,经过长期老化后这种差异仍然存在。
Several different ageing modes are used to age the high-viscosity SBS modified asphalt, and the fluorescence microscope technology is used to compare and analyze the asphalt specimens before and after aged. A series of related microscopic parameters are achieved by the images after MATLAB and image-pro plus processing calculation. The loss ratio of SBS after the short-term aging is 77.7%(RTFOT) and 69.8%(TFOT) respectively, and the loss ratio of SBS after the long-term aging is 84.7%(RTFOT+PAV) and 85%(TFOT+PAV) respectively. At the same time, this paper compares and studies the macroscopic indexes of high-viscosity SBS modified asphalt. The macroscopic performances of high-viscosity SBS modified asphalt will be obviously different by two aging modes of TFOT and RTFOT. The aging degree of the asphalt by RTFOT aging mode is higher than TFPT. This kind of difference still remains after the long-term aging.
Several different ageing modes are used to age the high-viscosity SBS modified asphalt, and the fluorescence microscope technology is used to compare and analyze the asphalt specimens before and after aged. A series of related microscopic parameters are achieved by the images after MATLAB and image-pro plus processing calculation. The loss ratio of SBS after the short-term aging is 77.7%(RTFOT) and 69.8%(TFOT) respectively, and the loss ratio of SBS after the long-term aging is 84.7%(RTFOT+PAV) and 85%(TFOT+PAV) respectively. At the same time, this paper compares and studies the macroscopic indexes of high-viscosity SBS modified asphalt. The macroscopic performances of high-viscosity SBS modified asphalt will be obviously different by two aging modes of TFOT and RTFOT. The aging degree of the asphalt by RTFOT aging mode is higher than TFPT. This kind of difference still remains after the long-term aging.
引文
[1]李晓娟.OGFC沥青混合料路用性能研究[D].陕西西安:长安大学,2008.
[2]李立寒,孙艳娜.高粘度沥青粘度评价方法与评价指标的研究[J].建筑材料学报,2010,13(3):352.
[3]Lu X,Isacsson U.Chemical and rheological evaluation of ageing properties of SBS polymer modified bitumens[J].Fuel,1998,77(9):961-972.
[4]陈华鑫,周燕,王秉纲.SBS改性沥青老化后的动态力学性能[J].长安大学学报:自然科学版,2009,29(1):1-5.
[5]黄卫东,孙立军.SBS改性沥青的混合原理与过程[J].同济大学学报:自然科学版,2002,30(2):189-192.
[6]刘祖广,王仕峰,王迪珍.SBS改性沥青的结构与性能[J].合成橡胶工业,2004,27(1):39-42.
[7]李水平,范维玉,陈树坤,等.SBS改性沥青微观形态结构及性能的研究[J].石油与天然气化工,2003,32(3):147-149.
[8]Wegan V.Sampling for microscopy-test procedure[J].Danish Road Institute,1996.
[2]李立寒,孙艳娜.高粘度沥青粘度评价方法与评价指标的研究[J].建筑材料学报,2010,13(3):352.
[3]Lu X,Isacsson U.Chemical and rheological evaluation of ageing properties of SBS polymer modified bitumens[J].Fuel,1998,77(9):961-972.
[4]陈华鑫,周燕,王秉纲.SBS改性沥青老化后的动态力学性能[J].长安大学学报:自然科学版,2009,29(1):1-5.
[5]黄卫东,孙立军.SBS改性沥青的混合原理与过程[J].同济大学学报:自然科学版,2002,30(2):189-192.
[6]刘祖广,王仕峰,王迪珍.SBS改性沥青的结构与性能[J].合成橡胶工业,2004,27(1):39-42.
[7]李水平,范维玉,陈树坤,等.SBS改性沥青微观形态结构及性能的研究[J].石油与天然气化工,2003,32(3):147-149.
[8]Wegan V.Sampling for microscopy-test procedure[J].Danish Road Institute,1996.