不同老化方式对SBS改性沥青的性能影响
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摘要
通过对薄膜烘箱老化、PAV老化和紫外老化等不同老化方式下,SBS改性沥青老化前后的针入度、5℃延度、软化点、135℃动力黏度以及弹性恢复等性能变化影响规律进行试验研究。结果表明:老化后SBS改性沥青的5℃延度与135℃运动黏度变化幅度显著,老化作用对SBS改性沥青的高、低温性能影响显著;TFOT短期老化后,SBS改性沥青性能已发生大幅下降,在长期使用过程(紫外老化、PAV老化)中,随老化时间的延长,SBS改性沥青性能衰减幅度逐渐减小。
In this paper, the effects of aging before and after aging on SBS modified asphalt performance, such as penetration, 5 ℃ ductility, softening point, 135 ℃ dynamic viscosity and elastic recovery, are studied, by TFOT aging, PAV aging and ultraviolet aging respectively. The results showed that after aging,the 5 ℃ ductility and 135 ℃ kinematic viscosity of SBS modified asphalt changed significantly, and aging also had significant effect on the high and low temperature performance. After short term aging by TFOT, the performance of SBS modified asphalt decreased significantly. During the long-term application process(ultraviolet aging and PAV aging), with the extension of aging time, the attenuation rate of its performance gradually decreases.
In this paper, the effects of aging before and after aging on SBS modified asphalt performance, such as penetration, 5 ℃ ductility, softening point, 135 ℃ dynamic viscosity and elastic recovery, are studied, by TFOT aging, PAV aging and ultraviolet aging respectively. The results showed that after aging,the 5 ℃ ductility and 135 ℃ kinematic viscosity of SBS modified asphalt changed significantly, and aging also had significant effect on the high and low temperature performance. After short term aging by TFOT, the performance of SBS modified asphalt decreased significantly. During the long-term application process(ultraviolet aging and PAV aging), with the extension of aging time, the attenuation rate of its performance gradually decreases.
引文
[1]欧阳春发,李永胜,贾润萍,等.基质沥青及聚合物改性沥青的老化研究进展[J].合成材料老化与应用,2007, 02:22-28.
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[4]张俊,廖克俭,闫锋,等.基质沥青与SBS改性沥青的老化性能分析[J].石化技术与应用,2008, 03:237-239+243.
[5]郭淑华,吉永海,王子军,等.SBS的结构对改性沥青性能的影响[J].石油沥青,2001, 15(03):29-32.
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[8]路杨,房士伟,马庆伟,等.SBS改性沥青生产工艺关键技术控制的研究[J].石油沥青,2014,28(06):15-19.
[9]谭忆秋,王佳妮,冯中良,等.沥青结合料紫外老化机理[J].中国公路学报,2008, 01:19-24.
[10]张娟,李艳,郭平,等.紫外老化对SBS改性沥青性能影响研究[J].筑路机械与施工机械化,2016, 12:63-67.
[2]张争奇,李平,王秉纲.SBS改性沥青性能及老化的影响.公路,2005,(9):150-155.
[3]郝增恒,张肖宁,盛兴跃,等.超热老化条件下改性沥青的老化机理[J].建筑材料学报,2009,04:433-437.
[4]张俊,廖克俭,闫锋,等.基质沥青与SBS改性沥青的老化性能分析[J].石化技术与应用,2008, 03:237-239+243.
[5]郭淑华,吉永海,王子军,等.SBS的结构对改性沥青性能的影响[J].石油沥青,2001, 15(03):29-32.
[6]何燕,周维.SBS改性沥青光老化性能试验研究[J].现代交通技术,2010, 05:1-3.
[7]贾娟,张肖宁,袁燕.对改性沥青旋转薄膜烘箱试验RTFOT的探讨[J].公路,2003,10:79-82.
[8]路杨,房士伟,马庆伟,等.SBS改性沥青生产工艺关键技术控制的研究[J].石油沥青,2014,28(06):15-19.
[9]谭忆秋,王佳妮,冯中良,等.沥青结合料紫外老化机理[J].中国公路学报,2008, 01:19-24.
[10]张娟,李艳,郭平,等.紫外老化对SBS改性沥青性能影响研究[J].筑路机械与施工机械化,2016, 12:63-67.