A Study of the Compatibility Between Asphalt and SBS

Abstract

In this article, the compatibilities between different components of a base asphalt and styrene butadiene styrene (SBS) have been analyzed from microscopic structures. Specifically, the asphalt was separated into three components: saturates, aromatics, and resins, by Solvent Recycled Absorption Chromatography Separation Technology (SRACST). The compatibilities between these different components and the polymer were compared with the help of Fluorescence Microscope (FM) with which the existing state of the polymer SBS in these different components could be examined obviously. The modified effects indicated that aromatics could cause SBS swollen and, resins dissolved SBS better than saturates, though both the two components could partially dissolve SBS and the two mixtures presented two immiscible phase systems. In order to further investigate the compatibility between aromatics and SBS, from macroscopic properties, an additive rich in aromatics was added to the SBS/asphalt mixture, and the result was satisfactory.     

聚合物SBS改性沥青相容性研究

以胜华１００号沥青为原料，采用溶剂脱沥青工艺和溶剂再循环吸附色谱分离技术将沥青分成三组分；富饱和分（Ｓ），富芳香分（Ａ），富胶质（Ｒ）。根据微观形态结构的不同，考虑聚合物ＳＢＳ在不同组分中的存在形式，研究沥青组分与聚合物的相容性，结果发现：饱和分只起溶胀作用，对性质的改善没有什么作用，但不可缺少；真正改善性质的是芳香分和胶质，它们对ＳＢＳ部分溶解，整个体系呈两相结构，改性沥青要达到最佳性能，其饱和     

沥青-SBS反应性共混改性

为提高SBS改性沥青的热储稳定性，提出了沥青－SBS反应性共混改性的方法，并讨论了沥青－SBS反应性混改性的机理。试验结果表明，反应性SBS改性沥青的热储存稳定性显著提高，同时使用性能明显改善。利用荧光显微照相技术研究了反应性SBS改性沥青微观结构，结果表明反应性SBS改性沥青具有SBS、沥青两相连续的空间网络结构。     

Study on Storage Stability of SBS Modified Asphalt

The evaluation for the storage stability of SBS modified asphalt was made by adding selected inorganic stabilizers, which was reported in China and overseas. The experimental results showed that stabilizer A can improve the compatibility between base asphalt and SBS, the difference between bottom softening point and up softening point in the Isolate Test was about 0.2, which was much less than that of JTJ036-98 standard. So, the modification effect of stabilizer A on storage stability of SBS modified asphalt was the best. That is, in the period of storage and transportation, SBS and base asphalt did not isolate. Some defects were overcome during construction of an asphalt road surface. The adding stabilizer not only reduced the cost of production but also simply the procedure.     

SBS改性沥青储存稳定性试验研究

由于基沥青改性剂之间存在一个配伍性的问题，所以SBS改性沥青的储存稳定性能呈现出一定的差别。试验认为SBS改性沥青的储存稳定性与所使用的基质沥青的种类、改性剂的类型及稳定剂产品的类型有关，加工工艺和储存时间也影响改性沥青的稳定性能。     

基质沥青与SBS相容性的预测

沥青与SBS的相容性是改性沥青的一个重要参数,相容性的优劣对于沥青能否与SBS共混制得性能良好的改性沥青产品,以及改性沥青能否保持良好的储存稳定性有重要的影响。相容性好的沥青容易与SBS共混形成稳定的胶体结构,制得稳定性良好的改性沥青产品;反之,则不利于SBS的稳定分散。如果能够事先预测SBS与沥青的相容性,则对于改性沥青的研究和生产具有指导意义。研究采用了两种方法预测基质沥青与SBS的相容性,一是借助溶解度参数计算方法,二是对比分析沥青的族组成与相容性的相关性。     

偶联法合成道路用SBS与基质沥青的配伍性分析

基于偶联法聚合而成线型与星型SBS,采用国内外常用的基质沥青,进行改性试验,结果表明:偶联法合成的SBS能使基质沥青的高温、低温性能均得到较大幅度提高,感温性能改善;与SK、中燃油、盘锦沥青配伍性较好。单一改性剂很难使克炼和塔河沥青配伍性得到明显改善;线型SBS与沥青的配伍性优于星型结构SBS。     

废旧SBS改性沥青混合料的再生与应用研究

在考察新型沥青再生剂对三种实验室模拟老化基质沥青再生效果的基础上,对比了不同再生剂对路面回收旧SBS改性沥青的再生效果,最后对再生改性沥青混合料的高温稳定性与水稳定性进行了评价并在沈大高速公路铺设了500 m试验路段。结果表明,自制新型沥青再生剂对三种老化基质沥青均具有良好的再生效果,适宜添加量均为1O%;新型沥青再生剂对路面回收旧SBS改性沥青的再生效果优于所选的进口Golden-Bear和国产SZS型沥青再生剂;与国产SZS型再生剂相比,再生改性沥青混合料的高温稳定性与水稳定性更佳,试验路段也表现出了更好的应用效果。     

粉体SBS改性沥青

通过扮体SBS改性沥青和粒状SBS改性沥青性能对比，说明粉体SBS的出现，简化了生产工艺，降低了设备投资和生产成本，具有推广价值。     

改性沥青抗变形能力研究

以测力延度（温度为5℃,拉速为5 cm/min）及15℃的弹性恢复对基质沥青及其不同SBS加入量的改性沥青进行抗变形能力的评价,通过对测力延度曲线的分析,探索基质沥青及SBS改性沥青拉伸过程中的规律,研究改性沥青抗变形能力。     

γ射线辐照SBS对改性沥青性能的影响

利用常规软化点、低温延度、离析度试验，以殪动态流变实验方法，研究室温下γ射线辐照后的热塑性弹性体（SBS）对改性沥青性能的影响。SBS辐照后，改性沥青的软化点和低温延度明显提高，在辐照剂量40kGy时达到最高值。改性沥青的储存稳定性在辐照剂量20kGy时达到最佳。从动态流变实验的各个参数可以看出，辐照剂量低于30kGy时，辐照SBS改性沥青的性能都不低于未辐照SBS改性沥青；但当剂量超过30kGy时。改性沥青的动态力学性能有一定的下降。     

沥青延度与流变特性关系研究分析(一)

通过对两种基质沥青进行不同温度及不同速率下的延度试验，找出它们的流变特性，并从微观上进行分析，最后与路用性能相联系，又通过TFOT试验找出流变特性对耐老化性之间的关系，最后得出，沥青的流变特性可通过延度试验来表征，它能够较好地反映沥青的路用性能。     

Compatibility between SBS and Asphalt

Abstract

The compatibility between SBS and asphalt was studied by molecule simulation and asphalt's basic capability testing. The results indicated that SBS and asphalt had different compatibility in the different SBS added amounts at different temperatures. Some compositions of the asphalt could enter an assembled polybutadiene segment. The effects of this phenomenon enhanced the Glass transition temperature. With high shear force effect, some compositions of the asphalt also could enter a polystyrene segment, which decreased the Glass transition temperature, but did not seriously disjoin the physical cross-linking point. When the mass fraction of SBS was 4%, SBS presented disperse spherical grain. However, when the mass fraction of SBS was over 8%, it formed a continuous phase. With the increasing mass fraction of SBS, the softening point and low temperature ductility would increase, and penetration and high temperature storage stability would decline.     

Compatibility between SBS and Asphalt

The compatibility between SBS and asphalt was studied by molecule simulation and asphalt's basic capability testing. The results indicated that SBS and asphalt had different compatibility in the different SBS added amounts at different temperatures. Some compositions of the asphalt could enter an assembled polybutadiene segment. The effects of this phenomenon enhanced the Glass transition temperature. With high shear force effect, some compositions of the asphalt also could enter a polystyrene segment, which decreased the Glass transition temperature, but did not seriously disjoin the physical cross-linking point. When the mass fraction of SBS was 4%, SBS presented disperse spherical grain. However, when the mass fraction of SBS was over 8%, it formed a continuous phase. With the increasing mass fraction of SBS, the softening point and low temperature ductility would increase, and penetration and high temperature storage stability would decline.     

SBS改性沥青浅析

介绍了SBS结构及性能、沥青组分及其结构特点、SBS改性沥青的改性机理的研究沿革,总结了防水行业中SBS用于改性沥青存在的问题并提出了相应的建议.     

SBS改性沥青稳定机理的研究

通过加入相容剂和稳定剂来稳定SBS在沥青中的分散,制备贮存稳定性良好的SBS改性沥青,并探讨其稳定定理。研究表明,相容剂能够溶胀SBS的硬嵌段－－聚苯乙烯微区,有利于SBS在沥青中均匀分散,稳定剂能够引发SBS交联形成网络结构和沥青接枝到SBS上,稳定SBS在沥青中的分散,形成宏观均匀稳定的体系。     

集料在沥青混合料中的状态对其体积指标的影响

沥青混合料的体积特征参数对沥青路面路用力学性能具有重大影响，在采用体积设计方法时各种集料的密度参数设计的成功与否起着决定性的作用。其空隙率（VV）、矿料间隙率（VMA）、沥青饱和度（VFA）等各项体积指标的影响，得出了三种不同的计算模式下混合料体积指标变化规律。     

SBS改性乳化沥青生产技术探讨

介绍了影响SBS改性乳化沥青生产的因素，分别从SBS改性沥青、乳化剂、乳化沥青生产工艺、乳化沥青生产设备等几个方面进行了探讨。     

不同SBS对改性沥青性能的影响

在同样的配方和制作工艺条件下,考察了不同厂家生产的不同型号的SBS对于改性沥青针入度、软化点、延度等高低温性能的影响,确定了线性和星型SBS制作满足技术要求的配方。     

SBS和EVA复合改性沥青性能的研究

对不同配比的SBS加EVA复合改性沥青进行了性能优化试验，结果表明EVA的加入可以明显提高改性沥青的高温性能，井得出了SBS加EVA两种配比的较佳含量：3％SBS＋3％EVA、4%SBS＋2％EVA；在此试验基础上研究了稳定剂对其性能的影响，结果表明：稳定剂的加入可进一步的提高改性沥青的综合性能。