CoN-Ⅰ高模量改性沥青制备及性能研究

Study on the Preparation and Performances of CoN-Ⅰ High Modulus Modified Asphalt

高模量沥青是解决路面车辙问题的有效途径之一,对成品SBS沥青添加CoN-I高模量改性剂研制高模量沥青,对其三大指标及布氏黏度性能进行分析研究,研究结果表明:改性剂的加入使沥青的软化点升高、针入度减小、低温延性降低,黏度增大;当改性剂掺量为17%时,调制的CoN-I高模量沥青性能指标满足高模量沥青技术指标标准;结合沥青气动回弹试验进一步分析验证沥青性能变化,沥青蠕变变形与针入度具有较好的相关性。

Pavement rutting disease seriously affects the service life of pavement,high modulus modified asphalt is one of the important ways to solve pavement rutting.High modulus modified asphalt is prepared by adding CoN-I high modulus modifier in SBS asphalt and is analyzed combined with three major indexes and Cloth viscosity performance.The results show that the addition of modifier increases the softening point and viscosity of modified asphalt,decreases penetration and low temperature ductility.Referring to the performance standard of high modulus asphalt,the minimum content of CoN-I is 17%.In addition,there is a good correlation between asphalt creep deformation and penetration by newly introduced asphalt pneumatic rebound test,which can further analyze and verify the change of asphalt performance.