CT1 formwork presentation

1. Construction Technology
Group Leader : Hong Kai Yin 0323361
Group Members : Chee Wei Shan 0319572
Elliot Pang Siu Seng 0319438
Hiew Li Ming 0319941
Jackson Ting Shii Hang 0324326
Lee Ern Hui 0319703

2. What is Formwork
Formwork is either temporary or permanent molds into
which concrete or similar materials are poured.

3. Type of formwork
 Conventional
 Engineered
 Re-usable
 Permanently insulted

4. Conventional
 Built on site but out of timber and plywood or moisture-
resistant particleboard.
 Easy to produce but time-consuming for larger structures,
and the plywood facing has a relatively short lifespan
 Used extensively where the labour costs are lower than
the costs for procuring reusable formwork.

5. Engineered
 Built out of prefabricated modules with a metal frame
(usually steel or aluminium) and covered on the
application side with material having the wanted surface
structure (steel, aluminium, timber) .
 Faster and lower life-cycle costs

6. Re-usable
 These interlocking and modular systems are used to build
widely variable, but relatively simple, concrete structures.
 The panels are lightweight and very robust.
 Especially suited for low-cost mass housing schemes.

7. Permanently Insulted
 Assembled on site, usually out of insulting concrete
forms
 Formwork stays in place after the concrete has cured
 Speed, strength, superior thermal and acoustic insulation

8. Beam Foundation

9. Beam
 Beam is a structural element that is capable of
withstanding load primarily by resisting bending.
 Beam are characterized by shape, length and material.

10. Types of Beams
 Simple Span : supported at both ends
 Continuous : supported at more than two points
 Cantilever : supported at one end with the other end
overhanging and free.

11. Concrete

12. Steel

13. Column

14. Steel Column
Advantages
 Time saving to construct compare to timber
 Non absorbent material
 Greater strength
 Easy to apply

15. Disadvantages
 Comparatively more expensive
 Less flexible in design
 Temperature of structure is easily to be changed by
weather and affected the condition of contain.

16. Slab Foundation

17. Formwork for slab foundation
 Slab formwork can include formwork panels, joists, stringers, and
other supports that allow concrete to be poured and suspended above
the ground.
 Such formwork often combines a variety of materials, including metal,
plywood, and in some case even plastic components used to give
concrete its shape and strength.

18. Plywood
Advantages
 Suitable for smaller projects.
Disadvantages
 Unable to withstand higher amounts of weight
 It will warp, swell and shrink or complete failure of the form.

19. Timber
Advantages
 Most common material
 Light in weight
 Easily workable with nails
 Free from loose knots
Disadvantage
 Warp, swell and shrink

20. Steel
Advantages
 Stronger, durable and longer life than timber
 Can be reused more times
 Can be installed and dismantled faster
 Better quality
 Does not shrink or warp
Disadvantages
 Heavy
 Difficult to position
 Difficult to store and transport

21. Aluminium
Advantages
 Light weight
 The formwork face provides superior concrete finishing
 Stripping and material retrieval without the risk of falls
 Great flexibility
 Slabs of up to 90cm thickness, depending on grid size in use
Disadvantages
 expensive than steel

22. ~The End~