摘要
为了探究不同改性剂对基质沥青各项性能指标的改性效果,选取三种不同的改性沥青,SBS改性沥青、TPE改性沥青和高黏高弹改性沥青,进行室内试验研究对比。通过改性沥青胶浆锥入度试验、PG高温分级试验、温度扫描试验和MSCR试验,从抗剪强度、中高温性能、抗永久变形及变形恢复等方面系统地评估三种改性沥青的路用效果。研究结果表明:改性沥青及胶浆的制备,需要将制备时间、剪切速率、温度等参数严格控制在合理的范围之内,保证材料满足要求;各种沥青胶浆抗剪强度与温度呈现良好的相关性,并且各个回归方程的相关系数R^(2)非常高,TPE改性沥青胶浆有着较高的抗剪强度;三种改性沥青流变试验显示,TPE改性沥青的中高温抗变性能力和高温蠕变恢复能力最佳,高黏高弹改性沥青次之,SBS改性沥青低于前两种沥青。
In order to explore the modification effect of different modifiers on various performance indexes of matrix asphalt,three different modified asphalts,SBS modified asphalt,TPE modified asphalt and high viscosity and high elasticity modified asphalt were selected for indoor test and comparison.Through the cone penetration test of modified asphalt mortar,PG high temperature classification test,temperature scanning test and MSCR test,the pavement effects of the three modified asphalts are systematically evaluated from the aspects of shear strength,medium and high temperature performance,permanent deformation resistance and deformation recovery.The results show that the preparation of modified asphalt and mortar needs to strictly control the preparation time,shear rate,temperature and other parameters within a reasonable range to ensure that the material meets the requirements.The shear strength of various asphalt mortars has a good correlation with temperature,and the correlation coefficient R^(2) of each regression equation is very high,and the TPE modified asphalt mortar has a high shear strength.The rheological tests of three modified asphalts show that TPE modified asphalt has the best medium-high temperature anti-denatured ability and high temperature creep recovery ability,followed by high viscosity and high elasticity modified asphalt,and SBS modified asphalt is lower than the first two asphalts.
作者
张泽
白子玉
贺玉莹
姜涛
曹东伟
ZHANG Ze;BAI Ziyu;HE Yuying;JIANG Tao;CAO Dongwei(School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of Civil Engineering,Hebei University of Engineering,Handan,Hebei 056000,China;College of Ocean and Civil Engineering,Dalian Ocean University,Dalian,Liaoning 116023,China;Middle Road High-tech Traffic Inspection and Certification Co.,Ltd.,Beijing 100088,China)
出处
《河北工程大学学报（自然科学版）》
CAS
2022年第4期56-61,85,共7页
Journal of Hebei University of Engineering:Natural Science Edition
基金
河北重大科技专项(190438172)
河北省交通运输厅科技项目(XF2018-10)。
关键词
道路工程
改性沥青
沥青胶浆
抗剪强度
流变性能
road engineering
modified asphalt
asphalt mortar
shear strength
rheological properties
