多聚磷酸改性沥青性能研究

Research on Polyphosphoric Acid Modified Asphalt Performance

为了对不同多聚磷酸掺量(0.5%、1.0%、1.5%)下改性沥青的高温性能、低温性能、感温性能、流变性能、老化性能进行研究,文章采用针入度试验、软化点试验、延度试验、旋转薄膜加热试验、动态剪切流变试验(DSR)测试了多聚磷酸改性沥青的针入度、软化点、延度、车辙因子、相位角,研究结果表明:加入多聚磷酸后,改性沥青的高温性能、感温性能和抵抗永久变形能力、抗老化均得到改善,但其低温性能会降低。

In order to study the high-temperature performance,low-temperature performance,temperature-sensing property,rheological property and aging property of modified asphalt under different polyphosphoric acid contents（0. 5%,1. 0%,1. 5%）,this article used the penetration test,softening point test,ductility test,rotating film heating test,and dynamic shear rheological test（DSR） to test the penetration degree,softening point,ductility,rutting factor and phase angle of polyphosphoric acid modified asphalt. The results showed that the high-temperature performance,temperature-sensing property,resistance to permanent deformation and anti-aging of modified asphalt are improved after adding the polyphosphoric acid,but its low-temperature performance is reduced.