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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
ME SEMESTER II EXAMINATION SUMMER 2017
Subject Code: 2721302 Date: 26/05/2017
Subject Name: Pavement Design, Construction and Evaluation
Time: 02:30 PM to 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

Explain with sketch the functions of different layers of flexible pavement.
07

Briefly describe: Contact pressure, ESWL, Vehicle Damage Factor, Lane Distribution Factor, WMM.
07
Q.2

Design a suitable bituminous pavement section for a dual two-lane carriageway. The traffic at last count is 600 commercial vehicles per day in both directions with average vehicle damage factor of 2.0. Design subgrade CBR is 4 and the assumed design life of the pavement is 15 years after completion of construction. Take lane distribution factor 0.75 and assume 2 years between last count and the year of completion of construction. Use Guidelines of IRC 37-2001. (See Fig.1 and Plate
07

Explain with sketch laboratory procedure of CBR test.
07
OR

Explain with sketch Tri-axial method for flexible pavement design.
07
Q.3

Explain with sketch laboratory procedure of Marshall stability test for bituminous mix design.
07

Calculate the thickness of pavement section using tri-axial test method. E value of Subgrade 110 kg/cm2 E value of base course material 450 kg/cm2 E value of 7.5 cm thick bituminous concrete surface course material 1050 kg/cm2, Wheel load 5200 kg, Radius of contact area 16 cm, Traffic coefficient 1.8, Saturation Coefficient 0.8, Design Deflection 0.20 cm.
07
OR
Q.3

Explain with sketches various stresses developed in rigid pavements.
07

Calculate the stresses at interior, edge and corner region of cement concrete pavement using Westergaard's stress equations. Take wheel load 5100 kg, Ec 3 x 105 kg/cm2 Pavement thickness 20 cm, 0.15, Modulus of subgrade reaction K 7 kg/cm3, Radius of contact area 15cm.
07
Q.4

Briefly explain the construction procedure for Bituminous Macadam as a base course in flexible pavement.
07

The maximum quantity of water expected in one of the open longitudinal drains on clayey soil is 0.9 m3/sec. Design the cross section and longitudinal slope of the trapezoidal drain assuming the bottom width of the trapezoidal section to be 1.0 m and cross slope to be 1 vertical to 1.5 horizontal. The allowable velocity of flow in the drain is 1.2 m/sec and Manning's roughness coefficient is 0.02.
07
OR
Q.4

Explain with detailed sketches, construction of expansion joint and contraction joint in rigid pavement.
07
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Design the spacing of expansion and contraction joints of a plain cement concrete
pavement for a 2 lane highway using the given data. Take coefficient of thermal
expansion of concrete 10 x 10-6 allowable tensile stress in C.C. during
curing 0.8 kg/cm2, width of expansion joint gap 2.4 cm, coefficient of friction
1.5, maximum variation in temperature between summer and winter 200C.
07
Q.5 Enlist various types of failures in flexible pavement. Describe any two with
sketches stating its remedial measures.
07
Explain with sketch Falling Weight Deflection test. 07
OR
Q.5 Enlist various types of failures in rigid pavement. Describe any two with sketches
stating its remedial measures.
07
Describe and Discuss their importance and evaluation procedure. 07

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