改性沥青紫外光老化性能变化研究

为了研究沥青在紫外光老化作用下的性能变化，本文采用三种不同性质的改性沥青，通过室内模拟自然界的紫外光老化，对沥青的常规指标、旋转粘度及低温蠕变性能进行了研究。研究结果表明，当对3种沥青进行紫外光老化后，老化前后的橡胶沥青的针入度最大，SBS 沥青的延度最大，而 Sasobit的软化点最高。SBS 沥青的粘度比和老化指数最大，而橡胶沥青的粘度比及老化指数最小。试验发现采用不同的评价指标得到的沥青抗老化性能也不一致。

Experiment on the Photooxidation Aging Properties of Modifiedasphalt

To study the properties of aging resistance of asphalt,in this study,three different types asphlat were invested through conventional indexes,viscosity and bending beam rheometer.The results show that the penetration of rubber asphalt is the highest,the ductility of SBS asphalt is the highest while the soft point of Sasobit asphalt is the highest.the rubber had the smallest change of viscosity and the ag-ing index.The results also indicated the conclusion were different when used different evaluating indica-tor.