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03000CE308052001

PART ‏تا‎
‎Answer any two full questions, each carries 15 marks.
The soil subgrade sample was obtained from the project site and the CBR tests

was conducted at field density gave the following readings. Loads at 2.5mm and
जाय penetration are 55kg and 78kg. Find the total thickness of the pavement by
CBR method as recommended by IRC for commercial vehicles 1500 per day,
with 7% growth rate. The pavement construction is to be completed in three
years after last traffic count. If the materials in different layers are compacted
soil with 7% CBR, poor graded gravel with 20% CBR and well graded gravel
with 95% CBR, find thickness of each layer and sketch the pavement section.
Assume thickness of bituminous layer as 50mm. (CBR Design Chart
provided)
Explain the desirable properties of aggregates to be used in different types of
pavement construction.
With sketches explain different types of failures in flexible pavements. Also
discuss their causes
Explain the vehicular characteristics which affects the traffic performance.
What are the various factors to be considered in pavement design? Discuss the
significance of each.
Explain how spot speed data are presented and the results used in traffic
engineering.
PART C

Answer any two full questions, each carries20 marks.

What is wind rose diagram? Explain wind rose diagram and how it is being used

for determination of runway orientation.

The length of a runway under standard conditions is 2400m. The site for an
airport is above 520m above mean sea level. The airport reference temperature
is 32°C. Following data refers to the proposed longitudinal section of runway.

Determine the corrected length of runway.

End to end of runway (m) Grade (%)

1600 to 2400 -0.4

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