For a teaching portfolio plan for a masters class at the University of Toronto

1. Highway Repair:
It’s A Group Effort
How Does the Geotechnical
Engineering Department
Contribute?

2. Why Do We Use Non-
Destructive Testing?
 Assessing the potential durability of the pavement
 Confirming or locating suspected deterioration of
concrete
 Monitor long-term changes
 Determine the position, quality and condition of
reinforcement
 Minimize the number of destructive tests

3. Types of Tests
Non-Destructive Destructive
A non-invasive Conventional Methods
technique used to that enable the
determine the integrity strength of the
or properties of a concrete to be
material measured by coring or
cutting samples from
Allows inspection concrete
without interfering with
a product or element
final use

4. Types of Tests
Non-Destructive Destructive
Partially Destructive
Concrete is tested to failure but the
damage is localized and the
member is not significantly
weakened.

5. Name all the destructive
and non-destructive
testing methods you know

6. Examples of Tests
Non-Destructive Destructive
 Falling Weight  Coring
Deflectometer
 LOOK IN NDT notes
 Radiography at home
 Ground Penetrating
Radar
 Hammer Rebound
Testing
 Covermeter
 Ultrasonic Pulse
Velocity

7. Which of these tests do
you think we use on
Ministry Highways?

8. Tests Employed By The Ministry
 Visual Inspection
 FWD
 Ground Penetrating
Radar
 Coring

9. What does the FWD
measure

10. Typical FWD Testing Results

11. The Evaluation Matrix
Load Transfer Low Medium High
Efficiency (Crack < 13mm) (Crack 13-25mm) (Crack >25mm)
Good JPCP - Consider Other JPCP – Full Depth All – Full Depth
(>70%) Data to Determine Repair JRCP & Joints – Repair
JRCP & Joints – Do Consider Other Data to
Nothing Determine Repair
Fair JPCP – Full Depth All – Full Depth Repair All – Full Depth
(50-70%) JRCP & Joints – Consider Repair
Other Data to Determine
Repair
Poor All – Full Depth Repair All – Full Depth Repair All – Full Depth
(< 50%) Repair

12. Using the evaluation
matrix and the example
just handed out, which
sections of highway
would your team
suggest need repair?

13. The Evaluation Matrix
Load Transfer Low Medium High
Efficiency (Crack < 13mm) (Crack 13-25mm) (Crack >25mm)
Good JPCP - Consider Other JPCP – Full Depth All – Full Depth
(>70%) Data to Determine Repair JRCP & Joints – Repair
JRCP & Joints – Do Consider Other Data to
Nothing Determine Repair
Fair JPCP – Full Depth All – Full Depth Repair All – Full Depth
(50-70%) JRCP & Joints – Consider Repair
Other Data to Determine
Repair
Poor All – Full Depth Repair All – Full Depth Repair All – Full Depth
(< 50%) Repair

14. What was actually
repaired …