Subgrade Soil Characterization:
Various materials, source, functions, requirements, tests and specifications for use in various pavement layers. Index properties of soils, determination of strength properties of soil for flexible and rigid pavements, suitability of different types of soil for construction of embankment and other pavement layers, Laboratory and field compaction of soil, equipment for field compaction of soil, field compaction control, properties of compacted soils.
Introduction to Soil Stabilization:
Introduction, types of stabilization – mechanical, cementing and chemical, proportioning of materials, grouting – principle, grouting materials, grouting plant and equipment, injection methods and applications of grouting. Geosynthetics – introduction, types and applications.
Aggregate Characterization:
Origin, process of production of aggregates, sampling of aggregates, properties of aggregates, tests and specifications of aggregates for various layers of flexible and rigid pavements, Importance of aggregate gradation, proportioning and blending of aggregates (Rothfutch’s method), Super pave gradation, use of locally available materials in lieu of aggregates.
Bituminous Binders and Mixes:
Types of binders, properties and sues of bitumen, physical tests on bitumen, rheological and performance related properties of bitumen, grading of bitumen – penetration, viscosity and performance grading. Bituminous cutbacks and emulsions – preparation, types and uses, modified bitumen- CRMB, NRMB, PMB, Criteria for selection of bituminous binders, tests on ageing of bitumen – RTFOT and PAV.
Bituminous mixes – types, requirements, methods of mix design – Marshall, Hveem, Hubbardfield and super pave, tests on bituminous mixes.
Cement and Cement Concrete Mix Characterization:
Introduction, ingredients of cement, manufacturing process, types of cement, tests on cement, IS specifications, mix proportioning of cement concrete for pavements, tests on cement concrete, IRC specifications, use of additives in cement concrete, introduction to self-compacted concrete and roller compacted concrete, joint filler and sealer – requirements and functioning.