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使用一种工业重质油和中温煤焦油沥青进行共炭化反应，改善了煤沥青的炭化性质。利用核磁共振（ＮＭＲ）手段详细研究了共炭化反应前后沥青ＴＳ（甲苯可溶）组分的结构变化，发现共炭化反应使沥青中的环烷及链烷烃含量增加，烷烃结构尤其是环烷结构的丰富是导致沥青改性的主要原因。
The co-carbonization reaction using an industrial heavy oil and medium-temperature coal tar pitch has improved the charring properties of coal tar pitch. The structural changes of TS (toluene soluble) components of bitumen TS before and after co-carbonylation reaction were studied in detail by means of nuclear magnetic resonance (NMR). It was found that the content of naphthenic and paraffinic hydrocarbons in bitumen increased with co- The richness is the main reason leading to asphalt modification.