3 Shaded Portion - Sand as per Zone 2 - IS383 - 1970 Schematic Diagram Sand Making Model VSI 615, 650, 800, 1000 Aggregate Shaping Model VSI 850, 1500 COMPARATIVE COMPRESSIVE STRENGTH Based on 28 days, M 150, Concrete Cubes Laboratory Test Results TYPES OF SAND AVERAGE CRUSHING STRENGTH Natural Sand VSI-Crushed Sand 228 kg / Sq cm 248 ....