Maryland Highway Bridge
Type of Project:
Maintenance painting of bridge
Project Description:
Power clean, spot prime and overcoat bridge bearings, 3 ft. of beam ends at piers, diaphragms, and exterior surface of facia beams.
Reason project was undertaken:
Bridge bearings were starting to corrode and the existing paint system was failing, especially on beam ends under deck joints and on outside of facia beams.
Name and location of facility:
Zion Road Bridge, Salisbury, Maryland, USA.
Project start and completion dates:
November 27-28, 2001
Service Environment:
Temperature: -5F to +100F (20C to 38C), snow, ice, salt and moisture
Surface Preparation: Methods, degree of cleaning, profile:
Methods, degree of cleaning: 5,000 psi High Pressure water cleaning with zero degree rotating tip and 4 - 6 inch standoff to a SSPC-SP12 - WJ4-SC2. The State specifications required grinding to feather edges of remaining paint - for appearance reasons.
Coating application methods, equipment:
Termarust 2200 (RAVCS) Penetrant/Sealer - small squirt bottle and Termarust 2100 (RAVCS) Primer/Topcoat - Airless spray.
Coating system, number of coats, dry film thickness per coat, etc.:
Application of Termarust 2200 (RAVCS) Penetrant/Sealer into joints and connections and onto bearing surfaces - followed immediately with (wet on wet) application of Termarust 2100 (RAVCS) Primer/Topcoat.
Caulk coat (stripe coat) all joints and connections with 10 mils DFT Termarust 2100 (RAVCS) Penetrant/Sealer. On all bear metal and tightly adhered, contaminant free rusted surfaces apply spot prime @ 5mils DFT Termarust 2100(RAVCS) Primer/Topcoat, and then overcoat all areas with 5mils DFT Termarust 2100 (RAVCS) Primer/Topcoat.
Safety and Environmental Protection Measures:
A tarp system was used during power washing - to keep debris from roadway under the bridge and to enclose application of Termarust.
Unusual Job conditions:
None - the bridge was easily accessible.
Evidence of good performance:
No rusting or delamination of existing tightly adhered paint after one winter of service and the joints and connections are not leaking rust.
Why Termarust was used:
The Termarust coating system was used due to its field service performance. The State wanted a coating with a 5-year warranty and an expected 25-year service life - for this bridge in a developing section of the Eastern Shore of Maryland.
Owner’s Representative:
Contact: Shameem Khan,
Company: Bridge Maintenance, Maryland State Highway Administration.
Tel: 410-545-8421
Contractor:
Contact: Angelo Kaliakoudas,
Company: K & K Painting, Inc.
Tel: 410-633-2381
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