Pavement Design & Highway construction — Summer 2025

Briefly explain CBR.

Give classification of modified bitumen.

Explain factors affecting flexible pavement design.

Enlist physical properties requirement for rural road.

Calculate VDF for wheel load of 2160 kg. Take standard wheel load as 1080 kg.

Calculate CSA for AADT of 2500 veh/hr, design period of 30 years, LDF=0.75, VDF=2, vehicle growth rate = 7% per year.

Write and explain formula for calculating CSA.

Explain effect of temperature stresses in rigid pavement.

State critical conditions of stress in rigid pavement.

Compute the radius of relative stiffness and equivalent radius of resisting section of 22 cm thick cement concrete slab from the following data: Eof Cement concrete = 2.1 x 105 kg/cm2, Poisson’s ratio for concrete = 0.15, Modulus of subgrade reaction = 8 kg/cm3, radius of contact area of wheel load = 15 cm.

Draw neat titled sketch expansion joint in rigid pavement.

Differentiate between highway and runway.

Calculate the stresses at interior, edge and corner region of cement concrete pavement using Westergaard’s stress equations. Take wheel load = 5200 kg, Ec = 3 x 105 kg/cm2, Pavement thickness = 20 cm, μ = 0.15, Modulus of subgrade reaction K = 7 kg/cm3, Radius of contact area = 15cm

Describe construction procedure of WMM course.

Describe construction procedure of Bituminous base course.

Discuss in detail prime coat and tack coat.

Describe construction procedure of drainage layer.

Describe procedure for bituminous mix design.

Discuss importance of joints in rigid pavement.1

Discuss types of maintenance of flexible pavement.

State the need of maintenance of pavement.

Discuss design of overlay.

Discuss types of maintenance of rigid pavement.

Briefly explain Recycled Asphalt Pavement.

Discuss microsurfacing.