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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 Fosroc® Paveroc clean water immediately after grit-blasting to remove corrosion products from pits and imperfections within its surface. The prepared area should be blown clean with oil-free compressed air. Reinforcing steel priming Apply one full coat of Nitoprime Zincrich to all exposed reinforcing steel and allow to dry before continuing. If any doubt exists about having achieved an unbroken coating, a second application should be made and, again, allowed to dry before continuing. Substrate priming The substrate should be thoroughly soaked with clean water and any excess removed immediately prior to priming. Any areas of the substrate which dry out before application of the primer must be redampened before continuing. Thoroughly scrub Nitobond AR or diluted Durafloor Level Prime (4:1 with water) into the dampened surface taking care to ensure complete coverage particularly around the edges. Apply the topping whilst the Nitobond AR or Durafloor Level Prime is still tacky. The priming operation must be repeated if the initial coat has dried out. In exceptional circumstances, eg; where a substrate/repair barrier is required or where the substrate is wet or likely to remain permanently damp, Nitobond EP bonding aid should be used. Contact your local Parchem sales office for further information. Mixing Care should be taken to ensure that Paveroc is thoroughly mixed. A forced action mixer is essential. Mixing in a suitably sized drum using an approved spiral paddle in a slow speed (400/500 rpm) heavy duty drill is acceptable for the occasional one bag mix. Free-fall mixers must not be used. Mixing of part bags should never be attempted. Place 1.52 - 1.76 litres of drinking quality water into the mixer and, with the machine in operation, add one full 20 kg bag of Paveroc and mix for 3 minutes until fully homogeneous. Note that powder must always be added to water. Application The mixed Paveroc must be applied on to the primed surface before it dries. Areas which dry too soon must be scrubbed clean and reprimed exactly as described above before continuing. Apply the mixed Paveroc on to the primed substrate as soon as possible after mixing. The mortar should be applied evenly by trowel and tamped in place with a wood float to ensure full compaction. Thoroughly compact the mortar around any exposed steel reinforcement. Paveroc can be applied up to 50 mm thickness in single applications. Note the minimum applied thickness of Paveroc is 15 mm. Build-up Sections greater than 50 mm thickness can be achieved by application of multiple layers. In this instance, the surface of the intermediate layers should be scratch-keyed, covered with polythene sheeting secured at the edges, and allowed to set for a minimum of 7 hours (at 23°C) before continuing. Repriming as described above and a further application of Paveroc may proceed at this time. Finishing Paveroc should be struck off to the correct level and finished with a steel trowel to fully close the surface. If a textured surface is required, this can be achieved using a suitable roller or brush. The completed surface should not be overworked. Low temperature working In cold conditions down to 10°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. The material should not be applied when the substrate and/or air temperature is 10°C and falling. At 10°C static temperature or at 10°C and rising, the application may proceed. High temperature working At ambient temperatures above 30°C, the material should be stored in the shade and cool water used for mixing. Curing Paveroc is a cement-based repair mortar. In common with all cementitious materials, Paveroc must be cured immediately after finishing in accordance with good concrete practice. Using one of the Concure curing compounds, sprayed on to the surface of the finished mortar in a continuous film, is recommended. Large areas should be cured as trowelling progresses without waiting for completion of the entire area. Avoid overspray at edges on to the surrounding substrate. In fast drying conditions, supplementary curing with polythene sheeting taped down at the edges must be used. In cold conditions, the finished repair must be protected from freezing. Overcoating with protective finishes Paveroc is extremely durable and will provide an excellent hard wearing surface to the repaired locations. Surrounding floor areas may benefit from the application of an abrasion or chemical-resistant protective coating. For internal locations, Parchem recommend the use of one of its range of protective coatings. These products provide a decorative and uniform appearance as well as protecting areas of the floor which might otherwise be at risk. A protective coating may be applied over the repair area after prior removal of the curing membrane generally after 7 days. Your local Parchem sales office should be contacted for advice about external protective overlayments. INDEX 44 Page 2


Technical Dayta Sheet Compedium
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