The Unbound Aggregate Materials function is to test aggregates and soil aggregate mixtures used on VTrans projects to verify compliance with VTrans Specifications. This includes both laboratory testing of samples and field testing of materials for compaction. In addition to aggregate samples, rock samples are tested for strength parameters and salt testing is performed in order to verify compliance with specifications. The aggregate laboratory’s also assists municipalities in characterizing aggregate when requested. Tests include gradation, durability, and wear. All laboratories also perform testing in support of Agency research efforts.