| SI.N | Code book used (Description) | IS Code number |
|---|---|---|
| 1562 | Methods of test for soils, Part 13: Direct shear test | IS 2720-13:1986 |
| 1563 | Methods of test for soils, Part 14: Determination of density index (relative density) of cohesionless soils | IS 2720-14:1983 |
| 1564 | Methods of Test for Soils, Part XV: Determination of Consolidation Properties | IS 2720-15:1965 |
| 1565 | Methods of test for soils, Part 16: Laboratory determination of CBR | IS 2720-16:1987 |
| 1566 | Methods of test for soils, Part 17: Laboratory determination of permeability | IS 2720-17:1986 |
| 1567 | Methods of test for soils, Part 18: Determination of field moisture equivalent | IS 2720-18:1992 |
| 1568 | Methods of test for soils, Part 19: Determination of centrifuge moisture equivalent | IS 2720-19:1992 |
| 1569 | Methods of test for soils, Part 20: Determination of linear shrinkage | IS 2720-20:1992 |
| 1570 | Methods of Test for Soils, Part XXI: Determination of Total Soluble Solids | IS 2720-21:1977 |
| 1571 | Methods of test for soils, Part 22: Determination of organic matter | IS 2720-22:1972 |
| 1572 | Methods of test for soils, Part 23: Determination of calcium carbonate | IS 2720-23:1976 |
| 1573 | Methods of Test for Soils, Part XXIV: Determination of Cation Exchange Capacity | IS 2720-24:1976 |
| 1574 | Methods of test for soils, Part 25: Determination of silica sesquioxide ratio | IS 2720-25:1982 |
| 1575 | Method of test for soils, Part 26: Determination of pH value | IS 2720-26:1987 |
| 1576 | Methods of test for soils, Part 27: Determination of total soluble sulphates | IS 2720-27:1977 |
| 1577 | Methods of test for soils, Part 28: Determination of dry density of soils, in-place, by the sand replacement method | IS 2720-28:1974 |
| 1578 | Methods of Test for Soils, Part 29: Determination of Dry Density of Soils In-place by the Core-cutter Method | IS 2720-29:1975 |
| 1579 | Methods of test for soils, Part 30: Laboratory vane shear test | IS 2720-30:1980 |
| 1580 | Methods of test for soils, Part 31: Field determination of California Bearing Ratio | IS 2720-31:1990 |
| 1581 | Methods of test for soils, Part 33: Determination of the density in place by the ring and water replacement method | IS 2720-33:1971 |
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