The Development of a New Method for Determining Certain Physical Properties of Aggregates Without Using the Specific Gravity of Solids as a Function. Phase I

摘要

A process is described by which the volume of voids in an aggregate sample can be measured directly. The principle utilized is that if two of the three soil phase- solids, liquid and gas - can be eliminated, the eliminated phases can be measured when they are re-introduced. In this process the liquid and gaseous phases are eliminated. Liquid is then re-introduced and the liquid volume measured. This volume is the volume of the voids. This theory was subjected to experimental verification and the results compared with results obtained by testing the same aggregate by approved ASTM test procedures. Three types of aggregate were thus compared. These were (a) crushed limestone, (b) river gravel, and (c) blast furnace slag. The crushed limestone and river gravel were representative of conventional aggregates used in Alabama and the blast furnace slag was representative of lightweight aggregate. From a statistical analysis of results, it was found that there was no difference in the results obtained after testing the limestone and gravel. (Author)