The ability to assess the extent and severity of the four major bridge condition deterioration types, namely: de-lamination, concrete degradation, reinforcement corrosion and vertical cracking are essential a bridge condition survey.

JS Building Diagnostics has the assessment expertise and techniques to determine the extent of potential flaws.

Non-Destructive Testing (NDT) such as the Ground Penetrating Radar (GPR), Impact Echo (IE), Ultrasonic Surface Waves (USW), Half-Cell potential (HCP Electrical Resistivity (ER), and Chain drag/Hammer sounding for bridge deck evaluation are the diagnostic methods used in the evaluation.

Methodology

The effectiveness of Non-Destructive Testing (NDT) methods in detection and characterisation of the bridge condition is based on the severity of the deterioration. The following list of information can be provided for a bridge condition survey.

• Visual Inspection and Chain Dragging/Hammer Sounding

• Thickness of Concrete Deck

• Concrete Cover thickness

• Concrete Cutting/Sawing

• Extract Concrete Cores

• Inspect condition of steel rebar and concrete

• Corrosion inspection and monitoring

• Compressive Strength

• Chloride Content (Chloride at steel rebar level)

• Air content

Applications

• Delamination

• Concrete-degradation

• Reinforcement corrosion

• Vertical cracking

Capability Profile: Bridge Condition Survey