Asphalt concrete is approximately 95% sand and aggregates. In order to bind the aggregates into a cohesive mixture a binder is used. Find equipment to perform key tests used to determine the viscosity and other properties of asphalt binder here. Test results can indicate the suitability of a binder grade for a particular asphalt paving mixture. Tests specific to Superpave mixtures can be found Asphalt/Superpave.