INDEX PROPERTIES AND IS CLASSIFICATION
Index Properties: Phase Diagram, definitions, and their interrelationships. Determination of Index properties, Types of soil structures and Clay Minerals, IS soil classification of Soil.

SOIL WATER-EFFECTIVE STRESS ANALYSIS

Soil Water: Permeability, Darcy’s law-assumption and validity, coefficient of permeability and its determination (only laboratory method), permeability of stratified soils. Capillary phenomenon, Flow net characteristics and applications.

Effective Stress Analysis: Effective stress concept-total stress, effective stress and Neutral stress.

COMPACTION AND CONSOLIDATION

Compaction: Principle of compaction, Standard and Modified proctor’s compaction tests, factors affecting compaction, effect of compaction on soil properties, Field compaction control Mass-spring analogy, Terzaghi’s one dimensional consolidation theory (No derivation). Consolidation characteristics of soil (Cc, av, mv and Cv). Laboratory one dimensional consolidation test, Pre-consolidation pressure and its determination by Casagrande’s method.

SHEAR STRENGTH

Concept of shear strength, Mohr–Coulomb Failure Criterion, Modified Mohr–Coulomb Criterion Total and effective shear strength parameters, Measurement of shear strength parameters – Direct shear test, unconfined compression test, triaxial compression test and field Vane shear test, Factors affecting shear strength of soils.

BEARING CAPACITY AND SETTLEMENT

Bearing Capacity: Types of foundations, Determination of bearing capacity by Terzaghi’s and BIS methods (IS: 6403), Modes of shear failure, Factors affecting Bearing capacity of soil. Effect of water table and load eccentricity on bearing capacity of soil, Field methods of determining bearing capacity of soil (SPT and plate load test).

Settlement: Types of settlements and importance, Computation of immediate and consolidation settlement, permissible differential and total settlements (IS 8009 Part 1).