Pre-cast Concrete Panel Use in Freeway Rehabilitation

Can Non-destructive Testing Prolong The Life of an Aging Infrastructure?

Sasha GollishDecember 3rd 2008

How Does Non-Destructive Testing Apply to Highways

• The Highway Design Process• What Type of Repair to Use

•How is the Pavement Evaluated•What Nondestructive test are used in

the evaluation•The Future of Highway Repair

The Highway Design Process

The Repair Method

The Evaluation Process

Typical Structural Detail of Pre-Cast

Slab

Non-Destructive Testing at the Construction Level

Falling Weight Deflectometer Testing

MTO Guidelines with the FWD Test

Load Transfer Efficiency

Low(Crack < 13mm)

Medium (Crack 13-25mm)

High (Crack >25mm)

Good(>70%)

JPCP - Consider Other Data to Determine RepairJRCP & Joints – Do Nothing

JPCP – Full Depth JRCP & Joints – Consider Other Data to Determine Repair

All – Full Depth Repair

Fair (50-70%)

JPCP – Full Depth JRCP & Joints – Consider Other Data to Determine Repair

All – Full Depth Repair All – Full Depth Repair

Poor(< 50%)

All – Full Depth Repair All – Full Depth Repair All – Full Depth Repair

Ground Penetrating

Radar

Other Non-Destructive Tests

• Rebound Hammer/Hammer Schmidt• Penetration• Pull-Off• Magnetic/Electric Method• Maturity• Nuclear• Strain Gauges

The Future of Pre-Cast Panels

Thank you

Questions?