Quebec Bridge
Type of Project:
Rehabilitation and strengthening of the deteriorating structure; which included overcoating the existing paint system.
Project Description:
Lead abatement project utilizing Ultra-High Pressure Water Jetting (35,000 - 40,000 psi) and High Pressure Water Washing (5,000 - 6,000) psi) with particular attention being paid to crevice corroded joints and connections.
Reason project was undertaken:
To retrofit, strengthen, protect and extend the service life of the structure for 30 years.
Name and location of facility:
Quebec Bridge: Mile 2.70 Bridge Sub-division Quebec City, Quebec Canada
Project start and completion dates:
Start: 1997 - Completion: 2007
Service Environment:
Temperature: -40C to +40C (-40F to +104F). Bridge roadways are heavily salted in winter - over the St. Lawrence River/
Surface Preparation: Methods, degree of cleaning, profile:
Splash zone - SSPC-SP12-WJ3L-SC2, except in areas where tightly adhered coating exists and the interiors of boxes.
Remaining structure:
SSPC-SP12-WJ4-SC2
Coating application methods, equipment:
The Termarust RAVCS® Penetrant/Sealer and Topcoat are being applied using airless spray, brush and rollers.
Coating system, number of coats, dry film thickness per coat, etc.:
Termarust Series 2200 RAVCS® Penetrant/Sealer is applied to all joints and connections.
1) Non Splash Zone. Spot Prime: 2 -3 mils DFT. Topcoat 5 -7 mils DFT
2) Splash Zone. Spot Prime: 5 -7 mils DFT. Topcoat: 5 -7 mils DFT
Note: all materials are applied as a single coat wet-on-wet system
Safety and Environmental Protection Measures:
Lead paint and water were collected, filtered and recycled using a centrafuge
and filter system. Flow-through tarps, which could be lowered during high
wind periods, were utilized to contain the paint chips and water.
Unusual Job conditions:
The large size and complex nature of the structural design required special procedures for collecting and handling hazardous paint material. Paint materials were delivered to locations on the structure through a lengthy system of pipes and hoses, which would have been impossible if traditional paint systems had been used.
Evidence of good performance:
At the time (4 years into the project) the Termarust coating system is performing as specified and expected, with no warranty claims.
Why Termarust was used:
Only the Termarust coating system met the contract requirements of:
1) A 5-year warranty, which included leakage from crevice corroded joints and connections.
2) A 25-year service life without totally removing tightly adhered rust and aged existing paint.
3) Cost savings of $142,000,000.00 using Termarust Technologies system versus sand blasting and three-coat zinc system.
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