B.E./B.Tech. DEGREE EXAMINATION, APRIL/MAY 2010 Fourth Semester
Civil Engineering CE2255 — HIGHWAY ENGINEERING (Regulation 2008)Time: 3 hours Maximum: 100 Marks
Part A(10 x 2 = 20 Marks) 1. State any 2 contributions made by Jayakar Committee for the roaddevelopment in India.2. describe ruling gradient and exceptional gradient.3. What do you understand by non-passing sight distance?4. Write down the requirements of an ideal transition curve.5. How do you compute the ESWL at provided depth beneath the pavement for a dualwheel assembly?6. What is radius of resisting section?7. describe flaky aggregates.8. What is the purpose of applying tack coat in bituminous road construction?9. When is overlay needed in pavements?10. What is unevenness index?PART B — (5 × 16 = 80 Marks) 11. (a) (i) State and discuss the economic factors influencing highwayalignments. (8)(ii) Briefly discuss the role of MORTH and IRC in highwaydevelopment. (8)Or(b) Compare the 3 "Twenty year road development plan" in India. Alsoexplain the merits of every 1 of them. (16)12. (a) A valley curve is formed due to 2 gradients +2.5% and –1.75%. If thedesign speed of this highway is 80 kmph, determine the stopping sightdistance and design the valley curve to fulfill both comfort and head lightsight distance conditions. Or(b) elaborate the objectives of widening of road pavement at horizontalcurves? Derive an expression for the extra widening.13. (a) (i) State the limitations of CBR method of pavement design. (6)(ii) Using the subsequent data, design the flexible pavements layers (10)CBR of the sub-grade soil = 5%CBR of poorly graded gravel sub-base = 15%CBR of WBM = 80%Design life = 15 yearsAnnual rate of increase in the heavy vehicles = 7.5%No. of heavy vehicles per day during last count = 200No. of years ranging from the year of completion and year of last count =3 years.presume any other data obtained needed.Or(b) (i) elaborate the objectives of joints in cement concrete pavement?Sketch the various kinds of joints used in pavement construction.Indicate the principle of design. (10)(ii) discuss mud pumping. elaborate the causes for mud pumping andhow it can be prevented? (6)
14. (a) define how impact value of aggregate and specific gravity of bitumenare obtained by experiment in laboratory? (16)Or(b) discuss the construction procedure of the subsequent kinds of roads. (i) Dense Bituminous Macadam. (8)(ii) Bituminous Concrete. (8)15. (a) Classify the various kinds of failures in flexible pavement and mentionthe important causes of every. (16)Or(b) (i) discuss the principle and uses of Benkelman Beam test. (6)(ii) define the complete procedure of carrying out Benkelman Beamtest to evaluate the pavement with model computation. (10)
Civil Engineering CE2255 — HIGHWAY ENGINEERING (Regulation 2008)Time: 3 hours Maximum: 100 Marks
Part A(10 x 2 = 20 Marks) 1. State any 2 contributions made by Jayakar Committee for the roaddevelopment in India.2. describe ruling gradient and exceptional gradient.3. What do you understand by non-passing sight distance?4. Write down the requirements of an ideal transition curve.5. How do you compute the ESWL at provided depth beneath the pavement for a dualwheel assembly?6. What is radius of resisting section?7. describe flaky aggregates.8. What is the purpose of applying tack coat in bituminous road construction?9. When is overlay needed in pavements?10. What is unevenness index?PART B — (5 × 16 = 80 Marks) 11. (a) (i) State and discuss the economic factors influencing highwayalignments. (8)(ii) Briefly discuss the role of MORTH and IRC in highwaydevelopment. (8)Or(b) Compare the 3 "Twenty year road development plan" in India. Alsoexplain the merits of every 1 of them. (16)12. (a) A valley curve is formed due to 2 gradients +2.5% and –1.75%. If thedesign speed of this highway is 80 kmph, determine the stopping sightdistance and design the valley curve to fulfill both comfort and head lightsight distance conditions. Or(b) elaborate the objectives of widening of road pavement at horizontalcurves? Derive an expression for the extra widening.13. (a) (i) State the limitations of CBR method of pavement design. (6)(ii) Using the subsequent data, design the flexible pavements layers (10)CBR of the sub-grade soil = 5%CBR of poorly graded gravel sub-base = 15%CBR of WBM = 80%Design life = 15 yearsAnnual rate of increase in the heavy vehicles = 7.5%No. of heavy vehicles per day during last count = 200No. of years ranging from the year of completion and year of last count =3 years.presume any other data obtained needed.Or(b) (i) elaborate the objectives of joints in cement concrete pavement?Sketch the various kinds of joints used in pavement construction.Indicate the principle of design. (10)(ii) discuss mud pumping. elaborate the causes for mud pumping andhow it can be prevented? (6)
14. (a) define how impact value of aggregate and specific gravity of bitumenare obtained by experiment in laboratory? (16)Or(b) discuss the construction procedure of the subsequent kinds of roads. (i) Dense Bituminous Macadam. (8)(ii) Bituminous Concrete. (8)15. (a) Classify the various kinds of failures in flexible pavement and mentionthe important causes of every. (16)Or(b) (i) discuss the principle and uses of Benkelman Beam test. (6)(ii) define the complete procedure of carrying out Benkelman Beamtest to evaluate the pavement with model computation. (10)
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