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岩沥青是一种天然沥青,可以作为改性剂,制备岩改性沥青。岩改沥青已经在道路工程中得到广泛应用,而且人们正尝试着扩大岩沥青的应用范围。但是岩沥青的产地不同,其组成成分亦不同,对沥青的性能影响也不同。该文通过对青川岩沥青进行组分分析,对岩沥青中的杂质进行X射线衍射矿物成分分析和应用电感耦合等离子体发射光谱仪进行元素成分分析,探究了岩改沥青的改性机理。试验结果表明:通过四组分分析,得出岩沥青中沥青质、杂质含量高,杂质矿物成分主要为碳酸钙;与基质沥青相比较,岩改沥青的高温性能好,能提高与酸性集料的黏附性。
Rock bitumen is a natural bitumen that can be used as modifier to prepare rock modified bitumen. Rock to asphalt has been widely used in road engineering, and people are trying to expand the scope of the application of rock asphalt. However, the origin of rock asphalt is different, its composition is also different, the impact on the performance of asphalt is also different. By analyzing the composition of Qingchuan rock asphalts, the X-ray diffraction analysis of mineral components in rock asphalt and the elemental composition analysis using inductively coupled plasma atomic emission spectrometer are carried out to investigate the modification mechanism of rock-modified asphalt. The experimental results show that the asphaltene content in rock asphalt is high and the content of impurities is high. The mineral composition of the impurities is mainly calcium carbonate. Compared with matrix asphalt, rock modified asphalt has good high temperature performance, Adhesion.