沥青质量的优劣直接影响路用性能和公路寿命。 其中蜡含量、 软化点和针入度是沥青三大重要指标, 其分析过程繁冗耗时。 提出了一种快速准确的沥青性质检测方法。 实验共收集了220个已依照标准方法JTJ052-2000获得蜡含量、 软化点和针入度标准值的沥青样品, 采用偏最小二乘法（PLS）建立其红外光谱定量模型, 交互验证标准偏差（SECV）分别为0.13, 0.88, 3.18, 预测标准偏差（SEP）分别为0.14, 1.06, 3.90, 小于标准方法的再现性偏差, 任意选取不同厂家所生产的3个样品进行重复性测试, 均满足标准方法的精密度要求。 该方法具有重复性好、 分析速度快, 操作简单, 可显著提高沥青的分析效率, 在沥青质量检测与评价领域有着光明的应用前景。

The quality of bitumen directly affects road performance and road life. Traditional analytical methods for wax content, softening point and penetration of bitumen are tedious and time-consuming. A new fast method, with which the three properties can be determined at same time, is proposed in this paper. The spectra of 220 bitumen were collected and their wax content, softening point and penetration data were determined according to the standard JTJ052—2000. The quantitative calibration models for wax content, softening point and penetration were established using partial least squares (PLS), with SECV 0.13, 0.88, 3.18　and SEP 0.14, 1.06, 3.90, less than the reproducibility error stipulated in the standard method. Three samples were in random selected to test the repeatability, the results met the precision requirement of the standard method. With its advantages of better repeatability, fast, easy operation, the new method can be used as an alternative for the determination of wax content, softening point and penetration of bitumen.