Which test derives the density of a compacted specimen through specific gravity?

The bulk specific gravity test is designed to measure the density of a compacted asphalt specimen by assessing its weight in air compared to the weight of an equal volume of water. In this context, the bulk specific gravity is crucial because it provides a means to evaluate the amount of voids in the mixture, which can influence the durability and performance of the asphalt. This measurement gives insight into the density of the asphalt concrete as it reflects the actual in-place density of the asphalt when compacted.

This test specifically calculates how much solid material is present for a given volume of the compacted asphalt mixture, allowing inspectors to determine whether the mixture meets the desired specifications for density, which is critical for ensuring the long-term performance of the asphalt pavement.