GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-V (NEW) EXAMINATION — WINTER 2020
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Subject Code:3150613 Date:03/02/2021Subject Name:Pavement Design & Highway construction
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
- IRC -37 and IRC -58 codes are allowed.
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MARKS
Q.1 (a) What are the desirable properties of bituminous mix? 03
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(b) Write short notes on (i) Mud pumping (ii) Structural cracks 04(c) With the help of sketches, mention various layers of flexible 07 pavement. Write function of each layer.
Q.2 (a) What are wharping stresses? How are they developed in CC 03 pavements?
(b) Enlist various tests carried out on bitumen emulsion. Explain any 04 one in detail.
(c) Mention various steps involved in mechanistic pavement design of 07 bituminous pavements as per IRC 37
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Q.3 (a) What are requirements of expansion and contraction joints in rigid 03 pavements?
(b) State assumptions and limitations of Boussinesq’s theory 04
(c) List the different stresses induced in cement concrete pavements. 07 Discuss the critical combination of these stresses.
Q.4 (a) Explain the selection and gradation of Binder course. 03
(b) What is an equivalent single axle load? How can it be determined? 04
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(c) A 2.5 cm diameter dowel bar is transferring a vertical load of 3500N 07 across a 0.5 cm wide joint. Compute the dowel bar deflection at the edge of the joint and the corresponding concrete bearing stresses. Can the concrete handle this stress? Given, K¢ of 100,000 MPa/m, Er 0 200,000 MPa, and f'c’ of 28 MPa. Q.5 (a) Differentiate between WBM and WMM 03
(b) What do you mean by Ultra thin White topping? Explain in brief. 04
Q.6 (a) Write a short note on Interlocking Concrete Block Pavement (ICBP 03
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(b) Write the steps in Design of overlay 04(c) Explain the construction procedure of Earthwork, Granular sub base, 07 drainage layer and Dry lean concrete as per IRC-49
Q.7 (a) Differentiate between Cold in place (CIP) and Hot in place (HIP) 03
(b) Explain types of defects in maintenance of pavement 04
(c) Explain the Maintenance of pavement and its methodology as per 07 IRC: SP:83
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Q.8 (a) Enlist different bituminous mix treatments used in construction of 03 pavements
(b) Explain Cold mix technology as per IRC SP-100 04
(c) Explain Stone matrix asphalt as per IRC SP-79 and Warm mix 07 asphalt as per IRC SP 101
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