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.     

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。     

茂名SBS改性沥青制备乳化改性沥青

考察了乳化剂、稳定剂、均质器转速及乳化温度等对乳化改性沥青稳定性的影响。提供了一种SBS改性沥青制备乳化改性沥青的方法,在优选工艺条件下制备出符合交通部JTGF40-2004要求的乳化改性沥青试样。     

改性剂SBS与沥青相容性的研究

改性剂与沥青的相容性是决定改性效果和改性沥青制作工艺的关键因素,而聚合物改性沥青的相容性与基质沥青的组成,聚合物的剂量,聚合物的结构和组成以及储存温度密度相关,利用热储存稳定性试验系统,研究了改性剂SBS（苯乙烯－丁二烯嵌段共聚物）与基质沥青的相容性,结果表明,线型SBS普遍比星型SBS具有较好的相容性,SBS含量小于3％时改性沥青的稳定性较好,沥青质含量适中,芳香分含量越大的基质沥青与SBS的相容性越好。     

不同类型SBS的改性效果

结合中国石化茂名分公司改性沥青的生产,着重介绍了茂名分公司合成橡胶事业部生产的三种规格道路改性用SBS的实际应用情况,结果表明：三种改性剂均可生产出满足交通部JTGF40--2004《公路沥青路面施工技术规范》要求的SBS改性沥青产品。     

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.     

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。     

工厂式SBS改性沥青生产的影响因素

SBS改性沥青在道路建设中用途越来越广泛,工厂式生产所占比重越来越大,在生产加工过程中产品质量会受到很多因素的影响。介绍了在工厂式改性沥青生产中,沥青原料、SBS、稳定剂、相容剂及生产温度对产品质量的影响。     

SBS复合改性橡胶沥青试验研究

为了研究废旧橡胶粉和SBS复合改性沥青的结果,分析了聚合物改性沥青的改性机理,采用20%外掺橡胶粉,分别添加0.5%、1%、1.5%、2%的SBS进行复合改性,测试比较了复合改性橡胶沥青和普通橡胶改性沥青的主要指标,并研究了SBS掺量对橡胶沥青的影响,结果表明,复合改性橡胶沥青能达到比普通橡胶沥青更好的高低温性能。     

用辽河沥青生产SBS改性沥青的研究

对于聚合物改性沥青来讲，沥青与聚合物的相容性及改性沥青的储存稳定性对于沥青的储存，运输及使用都是非常重要的问题，本研究以辽河AH-90，辽河AH-140沥青为基质原料，通过选择合适的加工路线和工艺条件，制备出性能良好，PG分级较高，具有良好的热储存稳定性的SBS改性沥青。     

天然沥青复合SBS改性沥青的性能研究

天然沥青具有高含量的沥青质和胶质,将其掺入石油沥青中能够改善基质沥青的组成和结构,从而使改性沥青混合料获得良好的路用性能。对天然沥青复合SBS改性沥青的性能进行研究,研究结果表明:随着天然沥青掺量的增加,改性沥青的软化点呈上升趋势,黏度逐渐增大,而针入度随着天然沥青掺量的增加逐渐减小,天然沥青掺量为5%时,经过适当的调合,可以生产出常规性能指标基本符合JTG F40-2004《公路沥青路面施工技术规范》聚合物改性沥青I-D规格产品。     

Performance of SBR-Modified Asphalt Yufeng Cong

Abstract

A dose of SBR modifier added to asphalt can improve asphalt's performance in stability, permanence, viscosity, and resistance to aging. Better application performances of asphalt pavement are affected directly by proper SBR modifying. This paper shows some investigations that confirm the relationship between the addition of SBR with the structure and the properties of SBR-modified asphalt. This paper also discusses the modified asphalt high temperature property, low temperature ductility, and mechanism of SBR-modified asphalt. The addition of SBR modifier showed an increase in viscosity, softening point, and elastic recovery of modified asphalt with rising temperature. When the temperature rises, the improvement of SBR-modified asphalt in softening point, elastic recovery, and visco-toughness result from SBR cross-linking. Although the lengths of low temperature ductility of SBR-modified asphalt are increased, the viscosities of modified asphalt increase; however, the softening point between the upper layer and lower layer were about 1.8°C after the isolated experiment.     

Performance of SBR-Modified Asphalt Yufeng Cong

A dose of SBR modifier added to asphalt can improve asphalt's performance in stability, permanence, viscosity, and resistance to aging. Better application performances of asphalt pavement are affected directly by proper SBR modifying. This paper shows some investigations that confirm the relationship between the addition of SBR with the structure and the properties of SBR-modified asphalt. This paper also discusses the modified asphalt high temperature property, low temperature ductility, and mechanism of SBR-modified asphalt. The addition of SBR modifier showed an increase in viscosity, softening point, and elastic recovery of modified asphalt with rising temperature. When the temperature rises, the improvement of SBR-modified asphalt in softening point, elastic recovery, and visco-toughness result from SBR cross-linking. Although the lengths of low temperature ductility of SBR-modified asphalt are increased, the viscosities of modified asphalt increase; however, the softening point between the upper layer and lower layer were about 1.8°C after the isolated experiment.     

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。     

克拉玛依SBS改性沥青的热稳定性

采用化学复合法对克拉玛依沥青进行SBS改性，并对其热稳定性进行了考察。结果表明，化学复合法改性的沥青由于SBS与沥青之间有交联反应，它们的相容性好，使SBS能均匀稳定地分散在沥青中，且SBS的粒度小，因此具有良好的物理稳定性。模拟储存试验中沥青的软化点、针入度和延度数据表明，改性沥青在高温下具有良好的化学稳定性，其高低温性能也得以改善。按美国SHRP评价，克拉玛依SBS改性沥青达到了PG76-34等级。     

国产SBS改性沥青在高速公路上的应用

采用改性沥青及其沥青玛蹄脂碎石混合料路面，可以全面提高沥青路面的高低温性能。介绍了改性沥青工艺技术，重点阐述了在浙江省(ZJS)高速公路嘉兴段用于中面层(AC—161)和表面层(SMA—13)混合料的改性沥青类型、SBS改性剂、基质沥青的选用、工艺配比设计、改性沥青的现场加工工艺及其质量控制，并与品牌成品改性沥青的性能进行了比较。结果表明．采用国产东海脾重交沥青作为基质沥青、LG501 SBS作为改性剂，胶体磨工艺设备大规模生产SBS改性沥青，具有优良的综合性能，满足ZJS高速公路中面层(AC—161)及罩面层(SMA—13)改性沥青路面设计、施工的质量要求。     

溶剂型SBS改性沥青粘层材料的研制与应用

以SBS为主改性剂研制的溶剂型SBS改性沥青粘层材料,粘接强度达到0.3MPa,-15℃时绕10 mm圆棒涂膜无裂纹,为沥青路面坑槽修补提供了粘接强度高、低温柔性好及施工简单方便的粘层材料.     

SBS改性沥青质量影响因素分析及对策

改性沥青广泛应用于高等级公路建设,随着高速公路车流量日益增多、车辆大型化和超载运输,对高等级公路沥青路面质量提出了更高的要求。结合长岭分公司沥青厂生产实际,分析了基质沥青组成、SBS、稳定剂、相容剂及工艺条件等对SBS改性沥青质量的影响,并提出了保证产品质量的对策。     

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.