Tests for mechanical and physical properties of aggregates. Methods for the determination of resistance to fragmentation|Physical properties of materials, Hardness, Reproducibility, Strength of materials, Test equipment, Testing conditions, Impact testing, Synthetic aggregates, Natural aggregates, Ballast (aggregates), Crushing, Classification systems, Specimen preparation, Drop tests, Cement and concrete technology, Fragmentation tests, Mechanical properties of materials, Aggregates, Impact strength, Coarse aggregates, Mechanical testing, Hardness testing, Test specimens