摘要
巴基斯坦总体属于热带季风气候,炎热干燥,极端气温高达50℃,路面温度可达70℃。近年来,随着交通渠化与超载车辆的增多,对沥青路面承重层中面层提出了更高的技术要求。以我国援巴基斯坦公路网修复项目——国道N5公路为契机,探讨了Superpave20沥青混凝土的高温抗车辙性能、水稳定性和低温抗开裂性等路用性能。实践结果表明:Superpave20沥青混凝土具有优良的抗高温和抗剪切性能,为巴基斯坦公路网修复提供一种值得推广的新型沥青路面结构层材料。
The climate of Pakistan generally belongs to the tropical monsoon climate. It is hot and dry. Its extreme temperature is up to 50℃. Its pavement temperature can be up to 70℃. In recent years, with the increase of traffic channelization and overloaded vehicles, the higher technical requirements are put forward for the middle surface layer of the bearing layer of asphalt pavement. Taking the Pakistan Highway Network Restoration Project-National Highway N5 assisted by China as the opportunity, this paper discusses the pavement performances of high-temperature rutting resistance, water stability and low-temperature cracking resistance of Superpave20 asphalt concrete. The practical result shows that the Superpave20 asphalt concrete has the excellent high temperature resistance and shear resistance, which provides a new type of asphalt pavement structural layer material worth promoting for restoration of highway network in Pakistan.
出处
《城市道桥与防洪》
2018年第10期61-63,共3页
Urban Roads Bridges & Flood Control
