This document discusses the properties and uses of plywood formwork for concrete construction. It notes that plywood has a textured surface that can be smoothed through sanding, and is strong and resistant to moisture penetration. Plywood formwork is durable, reusable, and lightweight like timber formwork. The document also briefly discusses reconstituted wood, steel, aluminum, hardware, fasteners, and different types of nails used with plywood formwork.

1. Properties of
plywood formwork

2. Textured Surface and Strength of
Plywood
Textured Surface of Plywood
 Choosing right texture
 Creating smooth surfaces through sanding or machine
processes
 Smoothness cannot be discretely characterized due to
Imbibition
 Film faced plywood widely using, it has resins and glues
 Moreover, improved resistance to abrasion, moisture
penetration chemicals, insect and fungi
 Smooth hygiene and easy to clean surface
 It has similar properties as timber formwork, including
strength, durability and being light weight.

3. Strength of plywood formwork
 Weather resistant and do not stick on concrete
 Constructed with thin layers of wood glued together, it can be strong
and unable to split
 It is ideal for external applications
 Offers strong resistance to moisture, warping, rotting and splitting

4. Reconstituted wood
 It is an artificial wood includes a range of derivative wood products
which are manufactured by binding or fixing strands, particles, fibers
or other method of fixation to form composite.
 Wood sheets that are rotary sawn, applied to one another, and finished
to have the appearance of various desired woods.
 It results in a continuous, thin ribbon of wood.
 Reconstituted wood block is then dyed to create a consistent wood grain
pattern on the surface.

5. Contd…

6. Steel
 Long life span and multiple reuses.
 Steel shuttering give very smooth finishes to concrete surface.
 Compared with timber formwork, steel formwork are durable and
have longer life than timber formwork.
 Steel forms can be installed and dismantled with greater ease and
speed.
 Quality of the exposed surface is good.
 It does not absorb moisture and does not shrink or warp.

7. Aluminium
 Forms made from Al
 Lower density of Al forms than steel forms
 Strength of Al is handling tension and compression is
lower than the strength of steel.
 Wet concrete attracts Al.
 Al alloys resisting corrosions from concrete.
 Al wall forms are mainly used in textile walls.

8. Hardware and Fasteners in plywood
Hardwares
 Household hardware equipment such as keys, locks, handles, hinges,
plumbing, wire, chain, doors, windows, bathroom, cabins etc…
Fastners
 Devices that mechanically joints or affixes two or more objects together.
 Used to create non permanent joints that can be removed or dismantle
without damaging the joining components.
 There are 3 type of steel fasteners, that are stainless steel, carbon steel
and alloy steel.

9. Nails in plywood
There are 3 main types of nails
 Common wire nails
 Box nails
 Double headed nails.

10. Common wire nails Box nails
.
Double headed nails