共查询到20条相似文献,搜索用时 0 毫秒
1.
2.
3.
4.
The styrene-butadiene-styrene copolymer (SBS)–modified asphalt was aged by pressure aging vessel test. The effect of different content of rejuvenators on the physical and rheological properties of aged SBS-modified asphalt was investigated. The results showed that with the increase of the content, the physical and rheological properties of the aged SBS-modified asphalt are restored more significantly. Three kinds of rejuvenators were used to rejuvenate the properties of aged SBS-modified asphalt. It can be concluded that the improvement of rejuvenator-III on the properties of aged SBS-modified asphalt is the most obvious. The results also indicate that the rheological behavior of the aged SBS-modified asphalt is improved obviously by the rejuvenator. 相似文献
5.
6.
7.
有关SBS改性沥青老化研究的文献综述 总被引:2,自引:1,他引:1
在归纳国内外部分关于SBS改性沥青老化研究报道基础上,分别从常规性能、低温延展性、流变性、红外光谱和凝胶色谱等5个方面分析了SBS改性沥青的老化行为。认为:改性沥青经老化后粘度上升,且软化点、针入度变化,但变化方向取决于沥青硬化和改性剂裂解程度;低温延展性大大降低;流变性能显示老化改性沥青在高温下容易流动,抗变形能力降低;红外光谱表明老化改性沥青中的基质沥青和改性剂都发生了氧化反应;凝胶色谱图进一步证实了由于沥青的氧化聚合分子量变大,而改性剂因氧化裂解而分子量降低。 相似文献
8.
基质沥青与 SBS 改性沥青的老化性能分析 总被引:2,自引:0,他引:2
以辽河AH90沥青为基质沥青,在其中加入质量分数为3%的苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)改性剂,可制备改性沥青。利用沥青软化点随时间的变化关系,建立了2种沥青的老化动力学模型:lnR基=3.784 1.33×103texp(-4946/T),lnR改=3.949 1.54×103texp(-5 242/T)。通过比较2种沥青的动力学参数,得出改性沥青的抗老化性能优于基质沥青。借助红外光谱分析可知,基质沥青的老化主要是吸氧氧化反应;而改性沥青的老化除了具有基质沥青的老化反应外,还存在SBS中聚丁二烯链段的断裂和氧化反应。 相似文献
9.
The influence of multi-dimensional nanomaterials on the aging behavior of bitumen and styrene-butadiene-styrene copolymer (SBS) modified bitumen was compared. The laboratory aging methods included thin film oven test, pressure aging vessel and accelerated ultraviolet aging. The results showed that the deterioration of physical and rheological performances of two types of bitumens during thermal oxidation and photo oxidation aging could be slowed down by adding multi-dimensional nanomaterials effectively. In contrast with base bitumen, multi-dimensional nanomaterials had a better improvement on anti-aging ability of SBS modified bitumen. Fourier transform infrared spectroscopy test result manifested that multi-dimensional nanomaterials could retard the degradation of SBS modifiers during the aging process. 相似文献
10.
SBS改性沥青机理研究 总被引:8,自引:1,他引:8
通过分析SBS改性沥青的红外光谱谱图、组分分布、DSC谱图。考察储存和加工工艺参数对SBS改性沥青性能稳定性的影响,深入探讨了聚合物改性沥青的机理。认为沥青改性以物理改性为主;SBS颗柱易吸收沥青中的饱和分,溶胀后的SBS极性与胶质相似;SBS颗粒与沥青有不完全相容性,SBS颗粒与沥青组分的亲和作用对沥青的相态转变产生影响;沥青组分对SBS的溶胀与吸附是一个动态的过程,它是沥青新胶体体系的形成和沥青聚集态结构改变的基础,这种动态过程对聚合物改性沥青的性能有很大影响。 相似文献
11.
12.
13.
分析了不同SBS掺量(4.0%,4.5%,5.0%,5.5%)改性沥青对密实断级配薄层磨耗层混合料浙漏特性、飞散特性、高温稳定性及水稳定性等路用性能的影响.试验表明,随着SBS含量的增加,改性沥青的技术指标有明显提高,混合料的各项性能随之提高,当SBS含量大于5.0%时,改善效果最为显著,但是由于SBS含量增加,改性沥青存储稳定性有所下降。对剪切加工水平的依赖性增强,考虑到薄层磨耗层混合料的高技术要求,推荐SBS的掺量最好在5.0%以上,考虑原料造价和剪切加工水平,SBS的加入量最好控制在5.0%~6.0%。 相似文献
14.
中石化齐鲁分公司胜利炼油厂20t/hSBS改性沥青装置由三维石化化工设计院设计,建设公司施工,通过在基质沥青中加入SBS改性沥青母粒及化学助剂经胶体磨剪切,SBS以一定粒度的颗粒均匀分散在基质沥青中,以达到改善和提高沥青流变性及感温性能的目的。 相似文献
15.
16.
17.
Fereidoon Moghadas Nejad Mahdi Shahabi Mohammad Rahi Sholeh Kazemifard 《Petroleum Science and Technology》2017,35(22):2115-2120
In this research, the effect of adding SBS and vacuum bottoms residue on 60/70 neat asphalt binder have been carried out using classic and superpave testing methods. Adding SBS led to increase of softening point, elastic recovery and viscosity of asphalt binder. Besides, SBS reduced the penetration and ductility of specimens. Results of dynamic shear rheometer indicated that G* and G*sinδ reduced by adding the SBS content before and after aging while δ and G*/sinδ parameters increased. Therefore, adding SBS improves the permanent deformation and fatigue resistance of neat asphalt binder. 相似文献
18.
19.
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。 相似文献
20.
The viscous-elastic behavior, noise reduction and viscosity-temperature susceptibility of aged SBS modified asphalt (SBSMA) incorporated with fluid catalytic cracking slurry (FCC) and Trimethylolpropane triglycidyl ether (TMPGE) were investigated. The results indicate that the viscous-elastic temperature of rejuvenated binder will shift to a lower temperature due to the asphaltic composition adjustment and the agglomerate dispersion of the rejuvenators on aged binder; the viscous loss of binders relies upon their irreversible deformation; the rejuvenated binder makes contributions on reducing the vibration noise in comparison with aged one; the rejuvenated binder has a low viscosity that suitable for processing and pumping, and exhibits a weakening viscous-temperature susceptibility. 相似文献