塔河稠油掺炼焦化蜡油改善道路沥青性能的研究

针对塔河稠油重质化加剧，其减渣调制90号A级道路沥青产品存在闪点和PI值不能满足JTG F40规范A级道路沥青质量要求的问题，本文采用塔河稠油或塔河常压渣油掺炼焦化蜡油蒸馏工艺，对减渣及其调制道路沥青性能的影响进行了研究。结果表明，掺炼焦化蜡油有助于提高塔河减渣的蒸馏切割温度和改变其四组分分布，焦化蜡油的适宜掺炼比例为15%，此时塔河减渣调制的90号道路沥青闪点由237 ℃提高到258 ℃，PI值由1.33降低到0.57，也兼顾了沥青的高温性能和抗老化性质，满足了A级道路沥青产品质量要求，同时沥青混合料高温和水稳定性能得到改善。

IMPROVING ROAD ASPHALT PERFORMANCE BY CO-DISTILLATION OF TAHE HEAVY CRUDE OIL AND COKER GAS OIL

As Tahe heavy crude oil becomes heavier, the flash point and PI values of paving asphalt from Tahe vacuum residue fail to meet the requirements of JTG F40-2004 specification for A grade asphalt. The effect of feed co-distillation of coker gas oil (CGO) and Tahe heavy crude oil on the properties of resulting Tahe vacuum residue was investigated. The results indicated that CGO is beneficial to increase the distillation cutting temperature and change the SARA distribution of asphalt. The suitable blending ratio of CGO is 15%. The flash point of blended asphalt increases from 237 ℃ to 258℃, and the PI value decreases from 1.33 to 0.57, meanwhile, the high temperature performance and anti-aging properties are improved. The blended asphalt meets the technical requirements of F40 JTG for A grade paving asphalt. The final asphalt mixture has very good anti-high temperature deformation ability and good water stability.