道路沥青及沥青混合料的气候分区及关键性技术指标

Climate Zoning for Road Asphalt and Asphalt Mixtureand the Key Technical Index

本文叙述道路沥青及沥青混合料路用性能气候分区及新的指标体系，提出了以三个以上不同温度的针入度决定的针入度指数作为温度敏感性指标，以当量软化点、当量脆点及10℃延度分别评定沥青的高温及低温性能．沥青混合料性能在单一的马歇尔试验的基础上，增加了车辙试验、弯曲蠕变试验、冻融试验。

This paper describes the pavement performance climate zoning and a new technical index system for road asphalt and mixture. The study suggests firstly that the penetration index should be calculated by considering more than 3 different temperature conditions ;secondly the modified softening point and the modified breaking point including the10℃ ductility should be adopted separately to appraise asphalt high and low temperaturecharacteristics. The paper also indicates that for the asphalt mixture pavement performance, based on the Marshall test, the rut test, the bending creep test and the freezingand thawing test have been considered.