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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 JOINT FILLERS WATERPROOFING WATERSTOPS ROOFING TIMBER FLOORING ALPHABETICAL INDEX 77 Fosroc® Nitobond SBR Where thicker sections up to a total thickness of 40 mm are to be built up by hand or trowel application, the surface of the intermediate layers should be scratch-keyed and cured with Nitobond AR. Application of the slurry primer and a further application of Nitobond SBR mortar may proceed as soon as this layer has set. Finishing Nibobond SBR mortars can be finished with a steel, plastic or wood float, or by a damp sponge technique, to achieve the desired surface texture. The completed surface should not be overworked. Low temperature working In cold conditions down to 5°C, the use of warm water (up to 30°C) is advisable to accelerate strength development. Normal precautions for winter working with cementitious materials should then be adopted. High temperature working At ambient temperatures above 35°C, the material should be stored in the shade and cool water used for mixing. Curing Nitobond SBR mortars, toppings and renders are cementbased. In common with all cementitious materials, they must be cured immediately after finishing in accordance with good concrete practice. The use of Nitobond AR or one of Fosroc’s Concure curing compounds, sprayed on to the surface of the finished mortar in a continuous film, is recommended. In harsh drying conditions, supplementary curing with polythene sheeting must be used. Overcoating with protective decorative finishes Nitobond SBR mortar repairs are extremely durable and will provide excellent protection to the embedded steel reinforcement within the repaired locations. The surrounding parts of the structure will generally benefit from the application of a protective barrier/decorative coating to limit the advance of chlorides and carbon dioxide, thus bringing them up to the same protective standard as the repair itself. Where appropriate Parchem recommend the use of the Emer-Clad or Dekguard range of protective, anti-carbonation coatings. These products provide a decorative and uniform appearance as well as protecting areas of the structure which might otherwise be at risk from the environment. Emer-Clad and Dekguard products may be applied over the repair area without prior removal of the Nitobond AR curing membrane. Concure curing membranes must be removed prior to the application of Emer-Clad or Dekguard products. This is best achieved by light grit or sand-blasting. Cleaning Nitobond SBR should be removed from tools, equipment and mixers with clean water immediately after use. Cured material can only be removed mechanically. Limitations Nitobond SBR mortars, toppings and renders should not be applied when the temperature is 5°C and falling. Neither should they be exposed to moving water during application. Exposure to heavy rainfall prior to the final set may result in surface scour. If any doubts arise concerning temperature or substrate conditions, consult your local Parchem sales office. Estimating Supply Nitobond SBR: 20 litre drum (PC: 323105) Nitobond SBR: 200 litre drum (PC: 323115) Nitoprime Zincrich: 1 litre can Nitobond EP: 1.5 and 6 litre packs Nitobond AR: 1, 5 and 20 litre drums Coverage and yield Nitobond SBR: Refer to mix designs Nitobond SBR (as Approximately 2 to 3 m²/litre slurry primer): Nitobond Zincrich: Approx. 7 m²/litre Nitobond EP: 4 - 5 m²/litre Notes: the coverage figures for liquid products are theoretical - due to wastage factors and the variety and nature of possible substrates and mix design used, practical coverage figures will be reduced. Storage All products have a shelf life of 12 months if kept in a dry store in the original, unopened bags or packs. If stored at high temperatures and/or high humidity conditions the shelf life may be reduced. Nitobond SBR and Nitobond AR should be protected from frost.


32857 Parchem Technical Data Compendium 2015_Crop4emag.pdf
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