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为了揭示布敦岩天然沥青(BRA)的改性机理,采用四组分试验、X射线衍射试验、X荧光光谱试验和环境扫描电镜试验对BRA的材料特性进行了研究。结果表明,BRA的纯沥青中强极性的沥青质含量高而油分含量低,能显著提高基质沥青的高温稳定性;且BRA岩矿微观孔隙发达,具有极强的吸附自由沥青的能力,结晶程度高的活性矿物质表面和内部均强有力地吸附着高黏度的纯沥青,形成了性质稳定、抗剥离能力强的特殊“沥青~矿物”共混体。
In order to reveal the modification mechanism of natural asphalt (BRA) in Boudun rock, the material properties of BRA were studied by four-component test, X-ray diffraction test, X-ray fluorescence spectroscopy and environmental scanning electron microscopy. The results show that BRA pure asphalt has high polarity asphaltene content and low oil content, which can significantly improve the high temperature stability of matrix asphalt. BRA rocks have developed micropores with extremely strong ability to adsorb free bitumen and crystallize A high degree of active mineral surface and interior are strongly adsorbed with high viscosity of pure asphalt, forming a stable, strong anti-stripping ability special “asphalt ~ mineral ” blend.