REFINISHING
Phenolic fabric film faced plywood sheets leave the concrete surface exceptionally clean. Interior concrete walls are left ready to paint and free from wood grain imprinting and splinters. This is an important saving, in that walls and ceilings can often be painted without the need for expensive plastering.
REPETABLE AND PREDICTABLE FINISH
The phenolic fabric film face greatly reduces the difference in absorbencies
between used and new plywood
sheets, consequently providing a repeatable and predictable finish of
the concrete.
INCREASED LIFE OF SURFACE AGAINST WEAR
Whilst no formwork surface will stand repeated misuse, the tough phenolic
fabric film resists abrasion from the
wet concrete during pouring and compaction.
Phenolic fabric film faced plywood reduces the time involved in striking, cleaning and re-applying release agents,
so the plywood can be re-used more quickly.
REVERSIBLE PANELS
As phenolic fabric film faced plywood has a fabric film on both sides it may be possible to obtain extra re-uses by
carefully reversing the fabric film faced sheets on the formwork frame.
| HOW TO GET THE BEST FROM PEACOCK 'F' GRADE FABRIC FILM FACED PLYWOOD | |
|
Sealing of Edges |
|
|
|
|
| Phenolic fabric film faced plywood has its edges completely sealed at the factory and it is most important that all edges remain sealed. To obtain full value from a phenolic fabric film faced sheet any recut edges should be sealed as soon as possible. The reason for this is that water entering the edge of recut sheets can cause the veneers to swell and thus thicken the plywood sheet at these edges. | |
|
Sealing of Holes |
|
|
|
There are a variety of edge sealers that are effective in preventing water from entering a formwork panel. Amongst these are paints based on neoprene, chlorinated rubber, polyurethane and epoxy resin, and also cold-setting phenolic resin. Three coats of sealer should be applied to any edges. |
| Any holes made in fabric film faced formwork panels should be sealed to prevent water entering. If water does enter it may cause swelling around the holes. The materials recommended as edges sealers are also effective for sealing holes. | |
|
Sealing of screw or Nail holes, Fixing Care |
|
|
|
If it is found necessary to nails or screw through the face of the plywood (this practice being avoided wherever possible) it is recommended that screw holes are countersunk and filled with waterproof stopper of polyester resin or epoxy resin. Fixing care when plywoods have to be removed repeatedly, from the formwork, care in fixing will increase re-use. |
| Nails for fixing should be as small and as few as practicable, although all corners must be nailed. Panel pins are generally recommended for this use as they pull through with minimum damage to the plywood when removed from the formwork. If nailing form the reverse side, double headed nails are best for easy removal. | |
|
Pouring of Concrete |
|
 |
Uneven loading of formwork should be avoided. Best results are achieved if the concrete is poured as uniformly as possible in one continuous operation. The rate of pouring should exceed 2m per hour vertically. Wherever possible elements of a structure should be poured and compacted in single operations. |
|
Cleaning and Repair |
|
 |
To obtain full life, Cleaning should be carried out immediately after each use. Phenolic fabric film faced plywood may be wiped with a rage dipped in a release agent or cleaned with water and stiff brush. It may be necessary to use a hardwood scraper but care should be taken not to damage the plywood face. Do not use a wire brush or sharp metal scraper to dislodge hardened concrete. |
| Damage of the fabric film face my be repaired by applying three coats of polyurethane varnish or paint having ensured that the plywood is cleaning and dry before application . Allow sufficient time for the varnish to dry before using the panel. If face damage is extensive, it may be worthwhile reversing the fabric film faced sheet on the formwork. | |
|
Storage |
|
 |
Re-use and maximum economy of a formwork panel is directly related to its careful handling. When formwork is stored it is worthwhile ensuring that storage follows good practice. Always clean and repair the formwork panels before storage. The formwork should then be stacked off the ground on level supports and under cover. |
| Framed formwork panels should be stacked alternately face to face and back to back to avoid face damages by bolts etc. If panels are wet, do not allow them to dry too rapidly. | |
ECONOMICAL SIZES AND THICKNESS
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|||
- DESIGN INFORMATION
- The table below gives the allowable concrete pressures for multiple spanning panels at 19-27% moisture content, to give a maximum inter stud deflection of 1/300 span, with the face grain of the plywood perpendicular to the studs. The table is based on the use of standard size metric sheets of 1200 and 1500 mm widths. The plywood sheets should be of the standard constructions for plywood.
ALLOWABLE CONCRETE PRESSURES (kN/m2)
|
|
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
- BENDING PLYWOOD FOR CURVED CONCRETE SURFACES
- Phenolic fabric film faced plywood is particularly suitable for curved concrete formwork. The plywood can be bent to the approximate minimum raddi shown in the table when the moisture content is below 16%. In some instances the load required to produce these curves is high and adequate are necessary.
| Thickness mm | Parallel to grain | Across the grain | 45 Degree to Grain |
| 6 | 650 | 350 | 400 |
| 8 | 1000 | 800 | 500 |
| 12 | 1500 | 1250 | 550 |
| 15 | 2400 | 1800 | 800 |
| 18 | 3500 | 3000 | 1200 |
- OTHER USES
Weather proof plywood suitable for Exteriors of homes, Building Constructions, Storage bins, Kiosk, Shuttering
& Furniture making, Truck Bodies, Trailers etc.