HOMEWORK # 2
Name: Moinul Islam Mahdi
Student ID: 892833837
Q 1.5: What are the purposes of a seal coat?
The main purposes of a seal coat is to waterproof the surface and provide sufficient skid
resistance against slippery.
Q 1.6: What
Flexible Pavement Design
Goals of Pavement Design
Design a structure to withstand
cumulative effects of traffic and
environment for the life of the pavement
Minimize Life Cycle Cost
Maximize User Benefit
Layers are necessary to
AASHTO Method for
Rigid Pavement Design
Based on observed performance
AASHO Road Test
Based on mathematically calculated pavement
ACPA Design Pro
INTRODUCTION TO OVERLAY
Most popular rehabilitation method
Cost-effective means for correcting surface
deficiencies and increasing pavement
Improper selection of overlay type
REHABILITATION OF PAVEMENTS
1956 INTERSTATE HIGHWAY ACT.
A 41,000 miles network. Much of it was
completed in the 1960s and 70s, with some bits
and pieces not done until the 1980s and 90s.
2009 ASCE REPORTCARD
Does pavement exhibit progressive distress
caused by load?
Does the pavement need to be strengthened
to carry future traffic?
METHODS OF STRUCTURAL
Load related distress
Due October 20 (Thursday)
1. A pavement is subjected to the tandem-axle loads shown in Table below.
Determine the ESAL for a design period of 30 years using (a) Asphalt Institute
axle load factors (Table 6.4) and (b) the equiv
Quiz #4, CE 4670
11/1/2011 (Tu), 15 minutes
Using the AASHTO exible design procedure, determine the asphalt concrete (AC)
layer and base layer thicknesses (D1 and D2) that will be placed on subbase layer.
The expected design ESAL is 6 x 106. The p
Quiz #6, CE 4670
11/22/2011 (Tu), 15 minutes
List at least five limitations of the current AASHTO pavement design
or AASHO road test. (25 points)
i) One climate zone
ii) One subgrade (silty clay)
iii) Limited set of materials
iv) 1950s traf