Bitumen tests and VG grades, explained for exams and site
Penetration, softening point, ductility and viscosity tests, and how India moved to VG-10, VG-30 and VG-40 grading.
Subject
Transportation
Highways, traffic, pavements and airports.
Flexible pavement layers and the CBR test
What each layer of a bituminous road does, how the CBR test works, and how IRC:37 uses traffic in msa and subgrade CBR.
Stopping sight distance: how far ahead a driver must see
Reaction distance plus braking distance, the IRC values for reaction time and friction, and the effect of gradient.
Superelevation on horizontal curves, with the IRC method
Why roads are banked on curves, the e + f = V²/127R relation, IRC limits, and a step-by-step design.
Traffic flow fundamentals: speed, flow and density
The relation q = k v, Greenshields' linear model, and how to find the capacity of a road lane.