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Adding compatibilizer to polymer-modified asphalt (PMA) is an effective method to improve material compatibility and performance. However, only a few studies have systematically focused on how compatibilizer can affect the performance of styrene-butadiene-styrene (SBS) polymer-modified asphalt (PMA). In this study, six compatibilizers with different compositions were used to prepare SBS PMA samples. Conventional performance, viscosity-temperature characteristics, viscoelastic behavior, creep properties, and morphology were investigated. The results show that adding compatibilizer to SBS PMA has a great effect on performance. High aromatics content in compatibilizers improve the high-temperature performance of SBS PMA, while a high saturates content increases low-temperature performance. Additionally, a high aromatics compatibilizer increases temperature sensitivity. While the aromatics content improves the compatibility of SBS PMA to some extent, adding compatibilizer to SBS PMA has few effects on microstructure. From our results, we can conclude that the optimum aromatics content for adding compatibilizer to SBS PMA is from 33.21 wt% to 54.22 wt%. 相似文献
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为了研究自主研发的新型HPD温拌剂对高粘沥青性能的作用效果,考察了HPD掺量为0%、1.8%、2.0%、2.2%对高粘改性沥青的高低温性能、粘温特性、破坏温度及其微观结构的影响,并以掺量为2.0%的Sasobit温拌高粘沥青作为对比.实验结果表明:HPD温拌剂加入后可以提高沥青的高温特性,且效果要好于同掺量的Sasob... 相似文献
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以不同组成的相容剂制备了SBS改性沥青样品,通过常规性能试验、动态剪切流变试验、荧光显微镜评价了其老化前后的性能及微观结构的变化情况.结果表明:相容剂中芳香分含量越高,改性沥青的高温性能越好,而饱和分含量越高,改性沥青的低温性能越好;老化后,相容剂中芳香分含量越高,其改性沥青各项性能变化幅度越小,抗老化性能越好,反之饱和分含量越高其抗老化性能越差;微观相态结构发生了明显的聚集现象,饱和分含量越多,聚集越严重,颗粒粒径越大,体系由SBS和沥青双连续相变为SBS为分散相、沥青为连续相. 相似文献
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为了解决苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)改性沥青路面抗高温性能不足及易产生车辙病害的问题,通过在SBS改性沥青中分别加入3%、4%、5%的高密度聚乙烯(HDPE),考察HDPE对SBS改性沥青性能的影响,并与单一SBS改性沥青进行对比。采用常规性能指标、温度扫描实验、频率扫描实验、荧光显微镜技术、红外光谱(FTIR)表征对复合高强改性沥青的性能进行研究。结果表明,复合高强改性沥青体系中发生了交联反应,形成了致密的网状结构,且随着HDPE掺量的增加,复合高强改性沥青的软化点、布氏黏度与车辙因子等指标呈上升趋势;与SBS改性沥青相比,其抗高温变形的能力得到显著提升。但是当HDPE掺量增加到5%时,改性剂开始产生团聚现象,对复合改性沥青的低温性能造成负面影响,基于此推荐HDPE的最佳掺量为4%。 相似文献
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