CE 488 Lesson 7

Resilient Modulus (Mr) is best summed up by the following:

• Plastic Deformation
• Stiffness
• Concrete
• Base

The _________ is determined from the AASHTO flexible design equation based on the Resilient Modulus of the layer below.

• Structural Number
• Drainage Requirement
• Frost Sustipbility
• Pluto

The Structural Number of a flexible pavement system can be determined using:

• A good AC mix design
• Nomograph (using Reliability, Standard Deviation, ESALs, Resilient Modulus, and change in PSI)
• Pythagorean Theorum
• A proposed pavement cross-section (concrete thickness, bases/sub-base thickness)

Resilient Modulus (Mr) of a subgrade can vary due to:

• Moisture Content
• Taste
• Number of layers above the subgrade
• Tempreture

Draw a CBR testing aparatus

What was the most confusing topic from last lesson or the reading?

• Mr
• CBR
• SN