高黏高弹沥青在北京城市桥梁桥面铺装层中的应用研究

Study on Application of High-viscosity High-elastic Asphalt in Deck Pavement of Urban Bridge

随着交通流量和轴载的不断增加,以及极端天气越来越多,对桥面铺装层材料提出了更高的要求。分析了北京城市桥梁桥面铺装层的使用情况,通过与高掺量SBS改性沥青及其混合料的对比分析,指出高黏高弹沥青防水粘结层具有更好的高温稳定性能、抗剪切性能和抗拉性能,并将其应用于北京市某桥梁。通过室内实验研究和实体工程验证,提出高黏高弹沥青可以作为一种新材料应用在桥面铺装层中。

With the continuous increment of traffic flow and axle load, and with the more and more extreme weather, the higher requirements are proposed for the material of deck pavement. The article analyzes theservice condition of bridge deck pavement in Beijing. According to the comparison and analysis of high-content SBS modified asphalt and its mixture, the article points out that the waterproof adhesive layer of high-viscosity high-elastic asphalt has the better high-temperature stability, shear resistance and tensile performance. It is applied in a bridge of Beijing. According to the laboratory test and practical engineering validation, the article puts forward that the high-viscosity high-elastic asphalt can be taken as a new material to be used in the bridge deck pavement.