细集料毛体积相对密度和吸水率的新型试验方法研究

在沥青混合料配合比设计中，为合理确定空隙率Va、矿料间隙率VMA等体积参数，需要提供准确的细集料毛体积相对密度和吸水率等基本物理参数，但传统方法在此方面的试验精度尚有不足。近几年，国际上就细集料毛体积相对密度和吸水率试验方法提出了不少新的思路，本文介绍了这些新方法的工作原理和初步试验结果。研究表明：这些方法与传统方法相比而言，更加直接、客观，是未来的发展趋势。

Study on the New Methods of Measuring Fine Aggregate Bulk Specific Gravity and Percent Absorption

In order to gain the reasonable volumetric parameters such as the Void air, Voids in Mineral Aggregate in the mixture design, it is necessary to use accurate basic tmrmneters of aggregate especial the fine aggregate bulk specific gravity and percent adsorption, but there are some shortcomings for traditional methods. Recent years, some new meth- ods of measuring free aggregate bulk gravity and percent adsorption have been put forward in other countries. The paper introduces the working principle and results of these new methods. We think, comparing with the traditional method. It is the tendencies because it is more direct and objective.