Origin, classification, requirements, properties and testson road aggregates, concepts of size and gradation – design gradation,maximum aggregate size, aggregate blending by different methods to meetspecification.
Origin, preparation, properties and chemicalconstitution of bituminous road binders; requirements.
Preparation,characteristics, uses and tests. Adhesion of Bituminous Binders to RoadAggregates: Adhesion failure, mechanism of stripping, tests and methods ofimproving adhesion.
Mechanical properties, dense and open texturedmixes, flexibility and brittleness, (no Hveem Stabilometer & Hubbar – FieldTests) bituminous mix, design methods using Rothfuch’s Method only and specification, Marshal mixed design criteria- voids in mineral aggregates,voids in total mix, density, flow, stability, percentage voids filled withbitumen.
Various types ofequipment for excavation, grading and compaction – their working principle,advantages and limitations. Special equipment for bituminous and cementconcrete pavement and stabilized soil road construction.
Earthwork grading and construction of embankments and cutsfor roads. Preparation of subgrade, quality control tests.
Specifications of materials, constructionmethod and field control checks for various types of flexible pavementlayers.
Specifications and method ofcement concrete pavement construction (PQC Importance of providing DLCas sub-base and polythene thin layer between PQC and sub-base); Qualitycontrol tests; Construction of various types of joints.