灰色系统理论在SBS改性沥青中的应用

采用灰色系统关联度分析法首次从数学的角度研究了SBS质量分数与改性沥青理化性能之间的关系。分析结果表明,SBS质量分数对反映沥青低温抗裂性能指标的5℃延度具有很高的关联度,并且对反映沥青高温性能和低温性能的其它指标:软化点、当量软化点(T800)、粘弹范围(T800-T1.2)、当量脆点(T1.2)等都有着较高的关联度,表明SBS显著改善改性沥青的低温性能和高温性能是提高改性沥青路用性能的关键。研究结果与经验分析的结果基本一致,说明在SBS改性沥青研究中引入灰色系统理论是可靠的,对改性沥青研究有一定的指导意义。

Application of the Grey System Theory in SBS Modified Asphalt

The relationship between the quantity of SBS of modified asphalt and its performances was firstly studied by mathematics method with the relation degree of grey system and regression analysis. The result demonstrates that the SBS quantity had a very high association degree with the ductility of modified asphalt at 5 ℃, which reflects the property of its anti-crack at low-temperature, and had relative high association degrees with the other indexes relating to the high and low-temperature properties of modified asphalt, including softening point, equivalent soften point (T800), the range of viscous to elastic range (T800-T1.2) and equivalent frass point (T1.2). The result shows that to improve SBS properties at high and low temperature of modified asphalt is a key factor for improving the paving performance of asphalt. The result is in accordant to that from experiential analysis. This result indictes that to apply grey system theory to modified asphalt is reliable and it could guide the study of modified asphalt.