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Technical Dayta Sheet Compedium

CONTENTS INDEX 420 Technical CONCRETE REPAIR CORROSION CONTROL GROUTS & ANCHORS PROTECTIVE COATINGS INDUSTRIAL FLOORING SURFACE TREATMENTS JOINT SEALANTS CONCRETE JOINTING ROOFING WATERSTOPS WATERPROOFING JOINT FILLERS TIMBER FLOORING ALPHABETICAL Data Sheet Page 1 February 2012 Pecaform Sacrificial composite formwork Uses Pecaform consists of a flat steel wire mesh with a heat shrunk layer of stabilised polythene applied to both sides of the mesh. This combination creates a material that is both light weight and structurally strong. It can be supplied in either flat sheets or preformed. Pecaform is also easily folded to shape on site. The standard polythene colour is yellow but can be supplied in clear for full light penetration when used as a shed lining or for horticultural applications such as plant protection. Pecaform is very useful for foundation and pile cap formwork and is left in place. Typical applications include: „ Ground beams „ Footing & bases „ Pile caps „ Stop ends „ Special shapes & curves „ Void formation „ Ribbed & waffle slabs „ Penetrations „ Recesses „ Temporary fencing „ Wind breaks „ Safety screens Advantages „ Fast assembly. No hammer, nails or saw, just tie wire „ Extremely easy to handle on site using non-specialist labour „ Versatile form working material, perfect for difficult radius applications „ Primarily intended as a sub-grade formwork system that is backfilled on the outside of the form before concrete is poured Installation Instructions Foundation bases Bases can be constructed from either L-shapes or flat strips of Pecaform similar to either beam or pile cap construction. Lean concrete blinding is applied in the traditional manner, and the reinforcement cage complete with spacer blocks at the bottom is lowered onto the blinding. Pecaform is then placed against the side of the cage and spaced off the reinforcement with strips of long spacers, bar chairs or equivalent. Backfill the excavation up to 150 mm from the top of the Pecaform to prevent contamination. Suspended Beams (on piled foundation) The ground on which the beam is constructed should be capable of safely supporting the weight of the wet concrete during construction. Only nominal surface compaction is required and a thin layer of sand blinding to level the formation and bed-in the beam soffit may be necessary. Ground Bearing Beams These are founded in the bearing strata. Therefore, a thin layer of sand may be used as blinding to bed-in the Pecaform. Unless supported independently, Pecaform relies on backfill to counteract the pressure exerted by the concrete pour. Suitable spacers attached to the reinforcement cage ensure the beam profile is maintained. Girders For beams and footings up to and including 1.5 m in depth, where the Pecaform formwork is required to be re-used several times, the fastest and easiest technique is the girder system. This consists of a system of tie rods and girders strategically placed to give rigidity to the system during concreting. A simple locking mechanism at each end of the tie rod is designed to lock or unlock the girder and Pecaform with great ease and speed. The Pecaform girder system for foundation form-working consists of: • Pecaform VR6 • Tie rods and locking nails The Pecaform foundation form-working system represents the most economical alternative to conventional formwork. February 2012


Technical Dayta Sheet Compedium
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