Abstract

The oxidation of BND 50/70 bitumen in the presence of minerals is investigated by thermogravimetric analysis (TG) and differential scanning calorimetry (DSC). The minerals present are quartz, calcite, hornblende, oligoclase, orthoclase perthite, potassium–sodium feldspar, muscovite, and granite. Analysis in terms of the thermal effect indicates that, in the range 200–340°C in an air flux, the oxidation (oxidative aging) of bitumen is 6–10 times faster in the presence of the minerals. With increase in silicon-dioxide content and decrease in calcium-oxide content in the minerals, the oxidation rate of the bitumen significantly increases.

中文翻译：

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矿物存在下沥青的氧化破坏

摘要

通过热重分析（TG）和差示扫描量热法（DSC）研究了在矿物质存在下BND 50/70沥青的氧化。存在的矿物是石英，方解石，角闪石，低聚橄榄石，原长石珍珠岩，钾钠长石，白云母和花岗岩。根据热效应的分析表明，在200-340°C的空气通量范围内，存在矿物质时，沥青的氧化（氧化老化）速度要快6-10倍。随着矿物中二氧化硅含量的增加和钙氧化物含量的减少，沥青的氧化速率显着提高。