Page 94

Technical Dayta Sheet Compedium

CONTENTS CONCRETE REPAIR CORROSION CONTROL GROUTS & ANCHORS PROTECTIVE COATINGS INDUSTRIAL FLOORING SURFACE TREATMENTS JOINT SEALANTS CONCRETE JOINTING ROOFING WATERSTOPS WATERPROOFING JOINT FILLERS TIMBER FLOORING ALPHABETICAL Zinc-rich epoxy resin primer to protect steel reinforcement within repair mortars Uses Nitoprime Zincrich is the recommended anti-corrosion primer for exposed steel reinforcement for use with Renderoc concrete repair mortars. The product provides a barrier to further corrosive elements such as chlorides attacking the steel. Compatible with all Renderoc mortars and fluid micro-concretes. Advantages „ Excellent protective barrier to the steel from further „ Formulated for use with Renderoc repair products „ Single component product - easy to use with no „ Time saving - touch dry after 15 - 45 minutes „ Economical - single component ensures almost no waste Standards Compliance Water Byelaws Scheme - approved product. Product has also been approved by the British Board of Agreement, Certificate No. 91/2582 as part of the Renderoc system of concrete repair. Conforms to AS/NZS 3750.9 Type 1. Description Nitoprime Zincrich, an epoxy zinc primer, is supplied as a single component grey-coloured liquid based on metallic zinc and epoxy resins. Design Criteria One or two coats of Nitoprime Zincrich are generally required, dependent largely on nature and profile of the steel substrate. Nitoprime Zincrich is recoatable generally between 30 minutes and 1 hour after the initial application. Application of concrete repair materials may also proceed at this time. At elevated temperatures, the recoatable and overlay times will be reduced. The minimum application temperature for Nitoprime Zincrich is 5°C. Consult the local Parchem sales office for further information. Specification Clause Steel reinforcement primer The steel reinforcement primer shall be Nitoprime Zincrich, a single-component zinc epoxy primer. An unbroken 50 microns thick coating shall be capable of providing a protective barrier to further corrosive elements attacking the steel. It shall be a suitable viscosity to enable the coating to INDEX 82 Technical Data Sheet corrosive attack restrictive pot-life penetrate imperfections and pits within the surface of corrosion-damaged steel bars. The formulation of the primer shall be such that drying occurs to allow the application of the repair mortar to proceed after 20 - 45 min. at 35°C or after 50 min. to 1 hour at 20°C. It shall be fully compatible with the Renderoc system of concrete repair. Properties Recommended thickness per coat: December 2009 Page 1 50 microns (dry) Application thickness per coat: 120 microns (wet) Drying times – Touch dry: @ 20°C @ 35°C 45 minutes 15 minutes Fully dry/recoatable: @ 20°C @ 35°C 50 minutes - 1 hour 20 - 45 minutes Note: At temperatures below 20°C, drying times will be slower. Conversely, at temperatures above 35°C, drying times will be faster. Application Instructions Preparation Expose fully any corroded steel in the repair area and remove all loose scale and corrosion deposits. Steel should be cleaned to a bright condition paying particular attention to the back of exposed steel bars. Grit-blasting is recommended for this process. Where corrosion has occurred due to presence of chlorides, the steel should be high-pressure washed with clean water immediately after grit-blasting to remove corrosion products from pits and imperfections within its surface. Application The application of Nitoprime Zincrich must take place as soon as possible to a dry steel surface after completion of the preparation work but always within 3 hours. Although a single component product, it should be stirred thoroughly before use in order to redisperse any settlement. Apply one full and unbroken coat of Nitoprime Zincrich by suitable brush, making sure that the back of exposed steel reinforcing bars are properly coated. A small brush is generally more suitable for this purpose. Allow to dry fully before continuing. If any doubt exists about having achieved an unbroken coating, a second application should be made Fosroc® Nitoprime Zincrich December 2009


Technical Dayta Sheet Compedium
To see the actual publication please follow the link above