摘要
为了解不同抗车辙剂对基质沥青的改性作用效果,将占沥青质量比9.3%的抗车辙剂P1和P2分别加入到预热的沥青中,在160℃~170℃、170℃~180℃下持续均匀搅拌30 min后,进行剩余沥青三大指标(25℃针入度、软化点、10℃和15℃延度)的试验。结果表明:抗车辙剂对基质沥青有一定的改性作用,且抗车辙剂P2改性效果高于P1。改性后沥青的25℃针入度下降,软化点增大,可提升沥青混合料的高温抗车辙性能,建议抗车辙剂P1和P2应用在夏炎热区和夏热区;延度降低,性能损失50%以上,对沥青混合料的低温性能有一定程度的损害,不建议用于冬严寒区和冬寒区的面层施工中。
In order to study the modification effect of different anti-rutting agents on matrix asphalt,P1 and P2,the anti-rutting agents which occupy 9.3%of asphalt mass,were added to the pre-heated asphalt,and were constantly and evenly mixed for 30 minutes at 160℃~170℃and 170℃~180℃,to test the three indicators(penetration at 25℃,softening point,and ductility at 10℃and 15℃)of rest asphalt.Results showed that the anti-rutting agents had certain modification effects on matrix asphalt,and P1 had a higher modification effect than P2.After the modification of the asphalt,its penetration at 25℃decreased and its softening point increased,which can improve the high temperature rutting resistance of the asphalt mixture,so the anti-rutting agents P1 and P2 were suggested to be applied to areas which has higher temperature than 20℃in summer.The ductility loss was more than 50%,which has certain damages to the low temperature performance of the asphalt mixture,so P1 and P2 were not recommended to be used in regions with severe cold winters.
作者
张晓燕
ZHANG Xiao-yan(Shanxi Transportation Technology Research&Development Co.,Ltd.,Taiyuan,Shanxi 030032,China)
出处
《山西交通科技》
2020年第1期37-39,共3页
Shanxi Science & Technology of Transportation
关键词
抗车辙剂
基质沥青
改性作用
三大指标
anti-rutting agent
matrix asphalt
modification effect
three major indicators
