摘要
对基质沥青和纳米黏土改性沥青的流变性能进行了比较研究.结果表明,纳米黏土改性使基质沥青的劲度增加,相位角减少;同时降低了沥青老化程度.此外,从车辙因子G＊/sinδ的比较可以看出,纳米黏土改性能够使沥青的抗车辙性能提高,而提高的程度取决于纳米黏土的类型及掺量.低温到中温下的疲劳因子G＊ sinδ表明,纳米黏土改性降低了沥青的疲劳寿命,但经老化后,改性沥青与基质沥青相比疲劳寿命几乎相同.
In this paper, the rheological properties of matrix asphalt and nano - clay modified asphalt were comparative studied. The results showed that the nano -clay modified asphalt increased the stiffness, de- creased the phase angle; while reduced asphalt aging. In addition, comparing by rutting factor G＊/sinScan , the nano - clay modified asphalt could increase rutting resistance, and the degree of improvement depended on the type and dosage of nano - clay. Low to medium temperature fatigue factor G＊ sinδ indicated the modified nano - clay reduced the fatigue life of asphalt, but after aging, the fatigue life of modified asphalt and matrix asphalt was almost same.
出处
《石油沥青》
2014年第5期22-24,共3页
Petroleum Asphalt
基金
重庆市科技攻关计划项目(项目编号:2013AC6203)
关键词
纳米黏土
改性沥青
车辙性能
疲劳性能
nanoclays
modified asphalt
rutting performance
fatigue performance
