CEG $4126/6129$: PAVEMENT ANALYSIS AND DESIGN

SPRING $2024$: MIDTERM EXAM

MODULE I: Fundamentals

Following are outputs from the mechanistic analysis of a $3-$layer flexible pavement system. The pavement

is loaded with a $9000lb$ ESAL. Answer the questions that follow. All stresses are in psi; all displacements

in inches. Results for all layers at various depths are shown below.

What was the pressure in the tire? Justify.

What kind of layer is the first layer? Justify.

What was the thickness of the first layer? Justify.

What type of layer is the second layer? Justify.

What is the thickness of the second layer? Justify,

What type of layer is the third layer? Justify.

Circle all the critical stresses and strains in the above data.

Directly under the load, what are the bulk and deviator stresses in the middle of layer $2?$

Using the responses in #$4$ and #$8,$ calculate the resilient modulus for Layer $2.$

What are the two most critical stresses or strains for this pavement? Why?