复合改性炭沥青稳定性研究

将两种软化剂分别掺入煤沥青,制得软化煤沥青,再与石油沥青混合,经SBS改性后得到复合改性炭沥青。采用四组分分析法和胶体不稳定指数（IC）研究复合改性炭沥青的胶体稳定性。结果表明,加入适量的软化煤沥青能够增加复合改性炭沥青中沥青质含量,减少饱和分含量,同时达到调节芳香分和胶质含量的作用,使复合改性炭沥青的四组分含量分布合理。所制复合改性炭沥青的IC值较低,胶体体系稳定。

Stability of modified asphalt compound

Two kinds of softener were mixed in coal tar pitch to obtain softened coal tar pitch,which was then mixed with petroleum asphalt.The new mixture was modified by SBS to get the modified anthraxolite compound.The colloids stability of the anthraxolite compound was studied by employing quartering analytical method and colloid instable index（IC）.The results show that the content of asphaltene was increased and that of saturates was reduced by appropriate amount of softening coal tar pitch,while aromatics and colloid were regulated.Four components of the modified anthraxolite were distributed to a reasonable extent.The value IC of modified anthraxolite compound was low and the colloidal system was steady,which was beneficial to improving its ageing resistance and storage stability.