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Continue to ChatIS 2720 (PART 14) INDIAN STANDARD METHODS OF TEST FOR SOILS DETERMINATION OF DENSITY INDEX (RELATIVE DENSITY) OF COHESIONLESS SOILS. https://civilengineer.co.in/indian-standard-codes/is-2720-part-14-indian-standard-methods-of-test-for-soils-determination-of-density-index-relative-density-of-cohesionless-soils/