石油沥青与煤沥青的调和及乳化性能

Research of blended petroleum asphalt and coal tar pitch and its emulsification performance

将煤沥青与秦皇岛AH-90沥青进行调和及乳化,考察调和沥青及调和后乳化沥青的性质,研究煤沥青的种类及掺量对调和沥青及乳化沥青性质的影响规律。结果表明:煤沥青中大量甲苯不溶物(煤粉)的存在使得调和沥青和乳化沥青蒸发残留物的25℃延度大幅度下降,难以达到标准要求;1#和2#煤沥青最大掺量分别为25%和20%时,乳化沥青的1 d和5 d稳定性合格;相同煤沥青掺量时,1#调和沥青及乳化沥青蒸发残留物较相应的2#调和沥青及乳化沥青蒸发残留物的针入度小、25℃延度大、软化点高;随着煤沥青掺量的增大,两种调和沥青及乳化沥青蒸发残留物的25℃延度、针入度都呈现下降趋势,软化点呈升高趋势。

Two types of coal tar pitches and Qinhuangdao AH-90 petroleum asphalt were blended and emulsified. The influences of coal tar pitch types and dosages on the properties of blended asphalt and emulsified asphalt were investigated. The experimental results show that the coal tar pitches containing a lot of toluene insoluble（ pulverized coal） lead to the ductility at 25 ℃ of the blended asphalt and evaporation residue of the emulsified asphalt decrease significantly,which cannot meet the specification. When the maximal dosages of coal tar pitch 1#and 2#are 25% and 20%,the 1d and 5d stability results of the emulsified asphalts meet the standard. At the same coal tar pitch dosage,the blended asphalt and its emulsion evaporation residue by adding coal tar pitch 1#have less penetration at 25 ℃,and have larger ductility at 25 ℃ and softening than those by adding 2#. With the dosage of the two coal tar pitches increasing,the blended asphalts and the emulsion evaporation residues present the reduced tendency for ductility and penetration at 25℃,while the softening point shows increasing trend.