公路改性沥青温度敏感性评价方法对比研究

Comparative Study on Temperature Sensitivity Evaluation Methods for Highway Modified Asphalt

本研究旨在比较不同温度敏感性评价方法在评价改性沥青温度敏感性时的区别,以建立一种更为准确可靠的评价方法。据此本文使用了四种常见的评价方法对三种不同改性沥青材料的温度敏感性进行了评价,结果表明:针对不同的沥青材料,需要选用不同的评价方法,如针入度指数法和针入度黏度指数法适用于大部分沥青,但是前者有温度范围的限制而后者对数据点的精度和个数要求较高,此外黏温指数法和渐变温度试验法的操作相对复杂但精度较高。

This study aims to compare the differences between different temperature sensitivity evaluation methods in evaluating the temperature sensitivity of modified asphalt,in order to establish a more accurate and reliable evaluation method.Based on this,this article used four common evaluation methods to evaluate the temperature sensitivity of three different modified asphalt materials.The results showed that different evaluation methods need to be selected for different asphalt materials,such as penetration index method and penetration viscosity index method,which are suitable for most asphalt.However,the former intentionally limits the temperature range,while the latter requires high accuracy and number of data points.In addition,the operation of viscosity temperature index method and gradient temperature test method is relatively complex but with high accuracy.