Texas Dot Historic Highway Bridge
Type of Project:
Maintenance painting of a historic steel truss highway bridge, built in 1890.
Project Description:
Power wash clean and apply Termarust corrosion protection coating system.
Reason project was undertaken:
The previous coating on the structure was gone and crevice corrosion and pack rust was increasing. The State was taking this historic 69 ft long, one lane wide, bridge out of service and moving it to a nearby park location.
Name and location of facility:
Grayson County, Texas, USA.
Project start and completion dates:
August 7, 2002
Service Environment:
Temperature: 25F to +120F (4C to 49C), rain and occasional ice.
Surface Preparation: Methods, degree of cleaning, profile:
5,000 psi High Pressure water cleaning with zero degree rotating tip and 4 - 6 inch standoff to a SSPC-SP12 - WJ4-SC2.
Coating Application methods, equipment:
airless spray
Coating system, number of coats, dry film thickness per coat, etc.:
Application of Termarust 2200 (RAVCS) Penetrant/Sealer into joints and connections - 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 to enclose the structure during High Pressure water cleaning and application of the Termarust.
Unusual Job Conditions:
None
Evidence of good performance:
The coating is performing well - and the State bridge engineers are pleased with the coating and the cleaning and application methods.
Why Termarust was used:
The State wanted a coating system with a 5-year warranty with an expected 25-year service life, and a permanent color.
Owner’s Representative:
Contact: Kevin Pruski,
Company: Texas DOT.
Tel: 512-416-2306
Contractor:
Contact: Dino Kalfuntzos,
Company: GCE Contracting.
Tel: 817-443-3990
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