High Performance Highway Structures - RIBAProductSelector.com
High Performance Highway Structures - RIBAProductSelector.com High Performance Highway Structures - RIBAProductSelector.com
High Performance Highway Structures Product Datasheets and Safety Datasheets can be accessed via: www.international-pc.com
- Page 2 and 3: Over recent years the Highways Agen
- Page 4 and 5: While the above protective systems
- Page 6: Track Record (Cont’d) While a rec
<strong>High</strong> <strong>Performance</strong> <strong>High</strong>way <strong>Structures</strong><br />
Product Datasheets and Safety Datasheets<br />
can be accessed via: www.international-pc.<strong>com</strong>
Over recent years the <strong>High</strong>ways Agency has moved towards the use of two pack epoxy and polyurethane coatings<br />
for the protection of steel bridges in preference to more conventional single pack paints.<br />
These coatings offer improved corrosion protection and durability, savings in application and<br />
traffic management costs, and <strong>com</strong>pliance with Environmental Legislation.<br />
Coating systems for new highway structures are detailed in <strong>High</strong>ways Agency’s Specification for<br />
<strong>High</strong>ways Work Series 1900 and can be summarised as follows.<br />
Type 1 - Ready Access<br />
Surface Preparation:<br />
Blast clean with chilled iron grit or aluminium oxide grit to Sa3, medium profile.<br />
Coating System:<br />
1st Coat: Item 111, Intercure 324, Zinc Phosphate HB/QD Epoxy Blast Primer (2 Pack)<br />
2nd Coat: Item 112, Intercure 384, MIO HB/QD Epoxy Undercoat (2 Pack)<br />
3rd Coat: Item 168, Interthane 870, Polyurethane (2 Pack) Finish to 50 μm mdft<br />
Minimum Total Dry Film Thickness: 300 microns<br />
Type II - Difficult Access<br />
Surface Preparation:<br />
Blast clean with chilled iron grit or aluminium oxide grit to Sa3, medium profile.<br />
Metal Coating: Aluminium Metal Spray to 100 μm mdft<br />
1st Coat: Item 159, Intergard 214, Aluminium Epoxy Sealer (2 Pack)<br />
Apply at 12-20 m²/litre<br />
2nd Coat: Item 111, Intercure 324, Zinc Phosphate HB/QD Epoxy Blast Primer (2 Pack)<br />
3rd Coat: Item 112, Intercure 384, MIO HB/QD Epoxy Undercoat (2 Pack)<br />
4th Coat: Item 168, Interthane 870, Polyurethane (2 Pack) Finish to 50 μm mdft<br />
Minimum Total Dry Film Thickness of the Paint System: 300 microns<br />
Type III - Interior of Box Girders<br />
Surface Preparation:<br />
Blast clean with metallic abrasive to Sa2½, medium profile<br />
Coating System:<br />
1st Coat: Item 111, Intercure 324, Zinc Phosphate HB/QD Epoxy Blast Primer (2 Pack)<br />
2nd Coat: Item 112, Intercure 384, MIO HB/QD Epoxy Undercoat (2 Pack) to 100 μm mdft<br />
Minimum Total Dry Film Thickness: 200 microns<br />
1
Type IV - Galvanised Parapets<br />
Metal Coating:<br />
Hot Dip Galvanising<br />
Coating System:<br />
1st Coat: Item 155, Interprime 160, ‘T’ Wash<br />
2nd Coat: Item 110, Intergard 307, Zinc Phosphate Epoxy Blast Primer (2 Pack)<br />
3rd Coat: Item 111, Intercure 324, Zinc Phosphate HB/QD Epoxy Blast Primer (2 Pack)<br />
4th Coat: Item 168, Interthane 870, Polyurethane (2 Pack) Finish to 50 μm mdft<br />
Minimum Total Dry Film Thickness of the Paint System: 175 microns<br />
For the maintenance of steel highway bridges the Type I system would be applied to structures where all of<br />
the existing coatings are to be removed by <strong>com</strong>bined wet/dry abrasive blast cleaning to Sa2½ standard.<br />
Under circumstances where total removal of the existing paint system is not seen as necessary or where<br />
blast cleaning is not practical the use of surface tolerant epoxy primers and barrier coats is re<strong>com</strong>mended<br />
and a typical system utilising these coatings would be:-<br />
Surface Preparation:<br />
Prepare all areas of corrosion by abrasive blast cleaning or power tool cleaning to clean steel, removing all<br />
loose coatings to a firm edge. Clean down overall and present a clean, dry surface for painting.<br />
Coating System:<br />
Patch Prime: Item 115, Interplus 256, HB Epoxy Aluminium Primer (2 Pack) to 100 μm mdft<br />
1st Overall Coat: Item 116, Interseal 670 HS*, HB Epoxy Undercoat (2 Pack) to 75 μm mdft<br />
2nd Overall Coat: Item 116, Interseal 670 HS*, HB Epoxy Undercoat (2 Pack) to<br />
75 μm mdft<br />
3rd Overall Coat: Item 168, Interthane 870, Polyurethane (2 Pack) Finish to<br />
50 μm mdft<br />
Minimum Total Dry Film Thickness: 300 microns<br />
*For overcoating existing chlorinated rubber or acrylated rubber paints the use of Item 116, Interplus 770, is preferred.<br />
2
While the above protective systems are those most <strong>com</strong>monly specified for <strong>High</strong>ways Agency contracts, many DBFO<br />
Contractors and Local Authorities have preferred to employ other proprietary products and systems which can extend<br />
the life between maintenance periods such as glass flake epoxy barrier coats and acrylic polysiloxane finish coats.<br />
Interzone 505 glass flake epoxy can be applied up to 500 μm d.f.t. in a single spray application and can eliminate<br />
the need for aluminium metal spray on new structures thus reducing costs and improving production without<br />
<strong>com</strong>promising the corrosion protection.<br />
Interfine 979 acrylic polysiloxane has been adopted by many Local Authorities as their favoured choice of top coat.<br />
The product’s barrier protection can be <strong>com</strong>pared to an epoxy intermediate allowing a reduction in the paint system<br />
while its long term gloss and colour retention make it a clear choice for high profile structures such as bridges.<br />
Re<strong>com</strong>mended systems to offer a life to first major maintenance of 25 years+ are:-<br />
1. Surface Preparation:<br />
Blast clean with chilled iron grit or aluminium oxide grit to Sa2½ medium profile.<br />
Coating System:<br />
1st Coat: Intergard 307 Zinc Phosphate Epoxy Blast Primer (2 Pack) to 25 μm mdft<br />
2nd Coat: Interzone 505 HB Glass Flake Epoxy (2 Pack) to 400 μm mdft<br />
3rd Coat: Interfine 979 Acrylic Polysiloxane (2 Pack) Finish to 100 μm mdft<br />
2. Surface Preparation:<br />
Blast clean with chilled iron grit or aluminium oxide grit to Sa2½ medium profile.<br />
Coating System:<br />
1st Coat: Interzinc 52 HS Epoxy Zinc Rich Primer (2 Pack) to 75 μm mdft<br />
2nd Coat: Intercure 384 MIO HB/QD Epoxy Undercoat (2 Pack) to 125 μm mdft<br />
3rd Coat: Interfine 979 Acrylic Polysiloxane (2 Pack) Finish to 100 μm mdft<br />
Both systems eliminate the necessity for aluminium metal spray and therefore can show cost savings<br />
when <strong>com</strong>pared to other systems.<br />
3
Track Record<br />
Interzone glass flake epoxy has an established track in the severe environmental conditions of the<br />
Offshore Oil Industry and was introduced into the Onshore Bridges Sector in 1993. Since then it<br />
has been adopted by many authorities for both new steel and maintenance projects including:-<br />
Brafferton Bridge<br />
M25 Gantry<br />
Frome Footbridge<br />
New Hall Footbridge<br />
Middleton Bridge<br />
Woodhall Footbridge<br />
River Air Footbridge<br />
Scalpay Bridge<br />
Croydon Tramlink<br />
Chain Bridge<br />
Helmsley Road Bridge<br />
Tyne Millennium Bridge<br />
Wye Bridge<br />
White Bridge<br />
Doncaster Viaduct<br />
Parkway Bridge<br />
Southampton Underpass<br />
A1 Willowburn Bridge<br />
St Marys Bridge<br />
Centenary Way Viaduct<br />
North Yorkshire CC<br />
<strong>High</strong>ways Agency<br />
Gloucestershire CC<br />
Sheffield City Council<br />
Northumberland CC<br />
North Yorkshire CC<br />
North Yorkshire CC<br />
Western Isles Council<br />
Gibbs Ltd<br />
Monmouth CC<br />
Derbyshire CC<br />
Gateshead MBC<br />
Monmouth CC<br />
Hampshire CC<br />
Doncaster MBC<br />
Hampshire CC<br />
Hampshire CC<br />
<strong>High</strong>ways Agency<br />
Doncaster MBC<br />
Rotherham MBC<br />
4
Track Record (Cont’d)<br />
While a recent introduction into the bridges sector, Interfine 979 acrylic polysiloxane has been<br />
specified by many Local Authorities for both its durability and environmental benefits and<br />
<strong>High</strong>ways Agency has now allocated item number 185 to this product type. Projects include:-<br />
Wynyard Bridge<br />
Trent Bridge<br />
Wearmouth Bridge<br />
Myton on Swale Bridge<br />
Various Footbridges<br />
Thorngate Bridge<br />
River Tawe Bridges<br />
Bristol Bridge<br />
Morfa Stadium Bridge<br />
Paddington Basin Bridge<br />
Phoenix Bridge<br />
Cox Green Bridge<br />
Lumley Bridge<br />
New Hamilton Bridge<br />
North Lodge Bridge<br />
Queen Alexandra Bridge<br />
Tyne Swing Bridge<br />
Nevilles Cross Bridge<br />
Brandycarr Bridge<br />
Holme Forge Bridge<br />
Woodpecker Flyover<br />
Durham CC<br />
Nottingham City Council<br />
Sunderland City Council<br />
North Yorkshire CC<br />
Caerphilly Council<br />
Durham CC<br />
City of Swansea<br />
Bristol City Council<br />
Swansea City Council<br />
Atelier One<br />
WhitbyBird/Coventry City Council<br />
Sunderland City Council<br />
Durham County Council<br />
N Lanarkshire Council<br />
Durham County Council<br />
Sunderland City Council<br />
Newcastle City Council<br />
Durham City Council<br />
West Yorkshire County Council<br />
N Lanarkshire Council<br />
Leeds City Council<br />
Protective systems for rail structures are detailed in the Railtrack RT98 Specification and<br />
International Coatings have approvals for a <strong>com</strong>prehensive range of systems for both new<br />
and maintenance projects.<br />
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and and all product names mentioned in this publication are trademarks of, or licensed to, AkzoNobel. © AKZONOBEL 2013.<br />
International Protective Coatings has used its best endeavours to ensure that the information contained in this publication is correct at the time of printing.<br />
Please contact your local International Protective Coatings representative if you have any questions.<br />
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with the supply of products are subject to our standard conditions of sale.