本文件规定了三种测定粒度大于2？mm的粒状耐火材料体积密度（颗粒密度）的方法: -？方法1:真空汞法； -？方法2:滞留吸水法； -？方法3:根据ISO？5017，采用旋转干燥器选项的真空方法。 方法1拟作为参考方法。 注:根据测试材料的性质，这三种方法可以给出不同的结果。因此，任何关于堆积密度值的声明都可以附有所用方法或在发生争议时将要使用的方法的说明。 同样的方法可用于测定样品体积、选择和制备样品、计算体积密度和提交试验报告。

This document specifies three methods for the determination of the bulk density of granular refractory materials (grain density) having a grain size larger than 2？mm: —？Method？1: mercury method with vacuum; —？Method？2: arrested water absorption method; —？Method 3: vacuum method with spin dryer option according to ISO？5017. Method 1 is intended as the reference method. NOTE？Depending on the nature of the material tested, the three methods can give different results. Any statement of the value of a bulk density can therefore be accompanied by an indication of the method used or to be used in case of dispute. The same method can be used for the determination of the volume of the sample, for selecting and preparing the sample, for calculating the bulk density and for presenting the test report.