CoN-I与成品SBS复合干法改性高模量沥青混合料性能研究

Study on the Performance of CoN-I and SBS Composite Dry Modified High Modulus Asphalt Mixture

以SBS改性沥青为基础,采用干法拌和的方式与CoN-I型高模量剂进行复合,制备得到高模量沥青混合料。为验证其路用性能,通过与成品SBS改性沥青和某品牌高模量沥青制备的混合料进行性能对比。结果表明,CoN-I型高模量沥青能够有效提高混合料的高温性能和动态模量,动稳定度分别是SBS改性沥青和成品高模量沥青的1.5倍和1.3倍,能够有效降低车辙深度。此外,CoN-I型高模量沥青混合料优秀的粘弹特性能够改善水稳定性,并且在低温抗裂性.上相较于SBS沥青混合料降幅约为2%,能够满足相关规范对高模量沥青混合料的性能要求。

The high modulus asphalt mixture is prepared by using SBS modifed asphalt as base and com-pounded with CoN-I high modulus agent by dry mixing.In order to verify its road performance,its perform-ance is compared with SBS modified asphalt mixture and a brand high modulus asphalt mixture.The results show that CoN-I high modulus asphalt can effectively improve high temperature performance and dynamic modulus,its dynamic stability is 1.5 times and 1.3 times higher than that of SBS modified asphalt and high modulus asphalt,respectively,and can effectively reduce the rutting depth.In addition,the excellent viscoe-lastic properties of CoN-I type high modulus asphalt mixture improve the water stability,though the low tem-perature crack resistance is about 2%lower than that of SBS asphalt mix,but it can meet the performance re-quirements of relevant high modulus asphalt mixture specifications.