Volume 31, Issue 4 (July 2003)
Comparison of Fine Aggregate Uncompacted Voids Content Measured by the ASTM C 1252 and the VTM-5 Devices
As part of the National Cooperative Highway Research Program Project 4–19(2), a series of uncompacted voids tests was performed using the ASTM Test Methods for Uncompacted Void Content of Fine Aggregates, C 1252, and the Virginia Department of Transportation VTM-5 test devices. Comparisons between the uncompacted voids measured by the two devices were made by using five different measurement methods on each of six different fine aggregates. The effects of test procedure and/or device, and their interactions with particle size on the measurement of uncompacted voids were also examined. As expected, the findings indicate that the graded sample of ASTM C 1252, Method A produces a significantly lower result for uncompacted void content than do the other four methods. However, the five test methods are significantly correlated. Furthermore, while there appears to be an interaction between test device and particle size, this effect is negated when the graded sample of ASTM C 1252, Method A is used.