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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 286 Technical Data Fosroc® Concure CR Sheet Chlorinated rubber based curing compound Uses Mainly used on freshly laid concrete floors. Also used for curing vertical concrete areas immediately after the stripping of forms to assist strength development, improve chemical resistance, etc. Advantages „ Enables concrete to hydrate more efficiently „ Increases concrete strength and dusting resistance „ Eliminates the need for damp hessian, sand or polythene „ Rapid film formation „ Odourless when dry „ Facilitates job clean up and maintenance of the coated surface Description Concure CR consists of a processed blend of chlorinated rubber and modifying agents in Xylene to give a stable, transparent, quick drying, mobile liquid. Concure CR cures, seals and hardens the surface of new concrete, providing increased strength and durability and improved resistance to chemicals and surface dusting. Technical Support Parchem offers technical support to specifiers, end-users and contractors, as well as on-site technical assistance. Design Criteria The coating should be applied in a single coat to achieve a total dry film thickness of not less than 35 microns. To achieve the correct curing properties, Concure CR must be applied on to the substrate at the coverage rates recommended. Properties Data quoted typical for this product, but does not constitute a specification. Volume solids: 17.5% Specific gravity: 0.94 Drying time: 60 minutes on new concrete 30 minutes on old concrete Colour: Clear, light honey coloured Specification Clauses Concrete curing compound All designated areas are to have a liquid curing compound applied to the freshly finished concrete. The curing compound will be based on chlorinated rubber, and have a volume solids content of not less than 17.5%. Such a material is Concure CR as supplied by Parchem. The curing compound is to be applied in accordance with the manufacturers application instructions. Application Instructions New Concrete Concure CR should be evenly sprayed over the freshly laid concrete as soon as possible after final trowelling. Ideally Concure CR should be applied as soon as the surface bleed water has evaporated. Cleaning Concure CR should be removed from tools and equipment with Solvent 10. Limitations Certain adhesives for vinyl tiles, or other types of resilient flooring, and paints of an approved grade may be applied to concrete coated with Concure CR. It is important however that the concrete should be thoroughly cured prior to such application, and that a test area has been completed for approval. Cement based renders and toppings should not be applied over Concure CR. First remove the Concure CR by sand blasting or scabbling to provide a mechanical key. The life of Concure CR will depend on traffic conditions to which it has been subjected; therefore apply reviving coats as required. The bond of Concure CR is likely to fail if the product is applied to concrete or masonry substrates subject to back water pressure, and/or where extraneous salt particles are carried from the substrate to the interface by vapour or condensation. Substrates to which Concure CR is not resistant include oxidising agents, such as sodium hypochlorite, bromine water and sulphur dioxide. Concure CR is also not resistant to concentrated acetic acid, concentrated phosphoric acid, concentrated nitric acid, chromic acid, concentrated ammonia, animal fats and oils, synthetic oils such as brake fluid and some transmission fluids, vegetable oils and higher fatty acids such as oleic acid plus the following solvent types: aromatic hydrocarbons, esters, ketones and chlorinated solvents. A clear appearance with slight yellow cast is obtained. Concure CR will yellow when subject to ultra-violet radiation from sunlight. May 2012


32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf
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