CAJ | 학술논문

采用金属制小盛样皿浇注成型制备显微观测样本，在荧光显微镜100倍放大倍数下，观测实验室新制备SBS改性沥青、室温存放2个月的SBS改性沥青及不同厂家提供的成品SBS改性沥青显微相态。观测结果表明：在荧光显微镜下，改性剂的分布形态清晰可见，并且 SBS掺量为4%~5%时，微观上可以达到两相连续的最佳共混状态；随着存放时间的延长，当 SBS掺量大于3%时，改性沥青网状结构逐渐形成，这种网状结构会由于SBS改性剂吸附沥青分子中的油分充分溶胀、发育及分散到沥青中，基质沥青的组分发生重组，从而形成共混体系的空间网状结构。对于不同厂家的成品改性沥青，由于加工工艺和相容性等原因，微观相态存在明显的“聚结”现象，也就是宏观性能表现的“离析”现象。
채용금속제소성양명요주성형제비현미관측양본，재형광현미경100배방대배수하，관측실험실신제비SBS개성력청、실온존방2개월적SBS개성력청급불동엄가제공적성품SBS개성력청현미상태。관측결과표명：재형광현미경하，개성제적분포형태청석가견，병차 SBS참량위4%~5%시，미관상가이체도량상련속적최가공혼상태；수착존방시간적연장，당 SBS참량대우3%시，개성력청망상결구축점형성，저충망상결구회유우SBS개성제흡부력청분자중적유분충분용창、발육급분산도력청중，기질력청적조분발생중조，종이형성공혼체계적공간망상결구。대우불동엄가적성품개성력청，유우가공공예화상용성등원인，미관상태존재명현적“취결”현상，야취시굉관성능표현적“리석”현상。
The microscopic observation sample is prepared by casting molding with a small dish containing softening point ring.Three types of SBS modified bitumen were observed by FM with 100*magnification.These three types of samples are as follows:The first one is produced by our lab,without storing,the second one is produced by our lab and kept at ambient temperature for 2 months,and the third one is from other differ-ent factories.The results indicate that microscopic phase image is very clear,the SBS content is recommended between 4%~5%,which can be achieved on a two-phase con-tinuous microstructure on the best blends.With the increase of the storage period,the network structure of SBS modified bitumen whose SBS content was larger than 3% is gradually formed,and this network structure was contributed to SBS modified bitumen molecules adsorbing oil,which is fully developed into swelling dispersion in the bitu-men,and the component of the bitumen was reorganized,so a new space network struc-ture is formed.For modified bitumen produced by other different factories due to the difference of the process and compatibility,the presence of the microscopic phase ap-pears as “coalescence”phenomenon,and mainly appears as “segregation”on the macro performance.