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32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf

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 INDEX 78 Technical Data Sheet Epoxy resin primer, high strength bonding agent to bond concrete substrate to repair mortars Uses For bonding fresh wet cementitious materials to existing cementitious surfaces. For use on horizontal or vertical surfaces where mortar or concrete can be supported by formwork. The long ‘open’ life makes it suitable for use with formwork or where additional steel reinforcement has to be fitted. The product is ideal for roads, bridges, pavements, loading bays and factories, and for bonded or granolithic floor toppings. Nitobond EP is equally suited to internal and external applications. Nitobond EP may also be used as part of a repair system where a substrate/repair barrier is required or where the substrate is likely to remain permanently damp or wet. Advantages „ Positive adhesion - exceeds that of the tensile strength of the host concrete „ Exhibits high mechanical strength „ Can be applied on to dry or damp substrates „ Solvent-free - can be used in enclosed locations Description Nitobond EP is based on solvent-free epoxy resins containing pigments and fine fillers. It is supplied as a two-component material in pre-weighed quantities ready for on-site mixing and use. The ‘base’ component is white and the ‘hardener’ component is black, providing visual evidence (uniform grey colour) that adequate mixing has been achieved. Technical support Parchem offers a comprehensive range of high performance, high quality concrete repair and construction products. In addition, Parchem offers a technical support package to specifiers, end-users and contractors, as well as on-site technical assistance. Design criteria Nitobond EP is designed to have an overlay time of 90 minutes at 20°C. The minimum application temperature for Nitobond EP is 5°C. Consult your local Parchem sales office for further information. Properties Test method Typical result Compressive strength: 50 MPa Tensile strength: 20 MPa Flexural strength: 35 MPa Shear strength: 25 MPa Adhesive bond to concrete: In general, the bond will always exceed the tensile strength of the host concrete The following properties were measured at 20°C: Pot life: 35 - 45 minutes Initial hardness: 24 hours Full cure: 7 days Max. overlay time: 90 minutes Note: at temperatures below 20°C, the cure rate will be slower. Conversely, at temperatures above 20°C, the cure rate will be faster. Specification clauses Epoxy bonding agent The bonding agent shall be Nitobond EP, a two-component solvent-free epoxy resin. The 2 components shall be differentially pigmented in order to ensure visually that correct mixing has taken place prior to the application. The product shall achieve 50 MPa compressive strength, 20 MPa tensile strength, 35 MPa flexural strength and 25 MPa shear strength. The adhesive bond to the concrete substrate shall exceed the tensile strength of the host concrete. Application instructions Preparation Clean the surface and remove any dust, unsound material, plaster, oil, paint, grease, corrosion deposits or algae. Roughen the surface and remove any laitance and expose aggregate by light scabbling or grit-blasting. Oil and grease deposits should be removed by steam cleaning, detergent scrubbing or the use of a proprietary degreaser. The effectiveness of decontamination and soundness of the substrate should then be assessed by a pull-off test. Mixing Any steel reinforcement and formwork should be prepared, cut to size and shape, and made ready for assembly before mixing commences. Care should be taken to ensure that Nitobond EP is thoroughly mixed. The ‘hardener’ and ‘base’ components should be stirred separately before mixing to disperse any Fosroc® Nitobond EP September 2007


32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf
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