摘要
为解决沥青路面在高温多雨、车辆重载的环境条件下,易产生早期水损害和车辙病害等问题,引入了一种改善沥青砼路面的抗水损、抗车辙性能以及提高施工和易性的多功能改性剂。采用SEM和DSC微观方法以及黏温曲线对多功能沥青改性剂的作用机理进行分析,通过马歇尔试验、车辙试验及冻融劈裂试验对多功能改性沥青混合料的高温稳定性及水稳定性进行了评价,并与SBS改性沥青混合料进行路用性能试验比较。研究表明:多功能改性剂由于分子链较短,密度较大,更能均匀分散于沥青中,且与沥青形成整体性网络结构,显著改善了沥青混合料的高温稳定性能和水稳定性能,从而提高复杂环境下沥青路面的使用寿命和服役水平。
In order to solve the problems of early water damage and rutting on the asphalt pavement under the environmental conditions of high temperature and rain and heavy vehicle load,a new multifunctional modifier is introduced to improve the anti-water damage,rutting resistance and workability of asphalt concrete pavement.Analyze the action mechanism of the multifunctional asphalt modifier by SEM and DSC microscopic methods and viscosity-temperature curves.Through Marshall Test,rutting test and freeze-thaw splitting test,the high temperature stability and water stability are evaluated.These performancesaretest and compared with the road performances of SBS modified asphalt mixture.Studies have shown that the multifunctional modifier can be more uniformly dispersed in the asphalt due to its shorter molecular chain and higher density,and forms an integral network structure with the asphalt,which significantly improves the high-temperature stability and water stability of the asphalt mixture,so as to improve the service life and service level of asphalt pavement in complex environment.
作者
陈亚雄
陈国平
陆慰慰
CHEN Yaxiong;CHEN Guoping;LU Weiwei(Zhejiang Zhixin Testing Technology Co.,Ltd.,Jiaxing 314003;Changxing County Highway Engineering Co.,Ltd.,Changing 313100;Changxing Hengtong Highway Engineering Inspection Co.,Ltd.,Changxing 313100)
出处
《石油沥青》
2021年第4期47-52,共6页
Petroleum Asphalt
关键词
多功能改性剂
抗车辙
抗水损
施工和易性
SBS改性比较
multifunctional modifier
anti-rutting
anti-water damage
workability
compared with SBS modification
