Formwork for Concrete Construction

Formwork is a temporary or permanent moulds which used to support poured concrete in shape and hold it till it gains its ultimate strength and hardens properly. It is also called shuttering. Formwork can be classified in many ways on basis of Type of material used, by the concrete element supported, Removable or permanent.

20-25% of the cost of structure or even more is required for the formwork. Formwork take time. This temporary formwork should designed economically. When formwork is removed, the operation of removing called stripping and this stripping formwork can be reused. Reusable formwork are called as panel forms and non-usable are called stationary forms.

Timber is the most common material used for formwork. The disadvantage with timber formwork is that it will warp, swell and shrink.

A better Formwork should satisfy the following requirements:

• Joints should be enough tight so that leakage of cement grout can be avoided.
• Formwork has to be strong enough to handle dead and live load.
• It should be constructed in such way that removal of various part should not harm or damage to the concrete.
• The material which is used for formwork should be easily available, cheap and can be reusable thus makes it economical.
• It should be light as much as possible.
• To gain its proper shape, It should be rigidly constructed and efficiently propped and braced both horizontally and vertically.
• The material of the formwork should not warp or get distorted when exposed to the elements.
• It has to be rest on firm base.
• The formwork should be set accurately to the desired line and levels should have plane surface.

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Blog written by
Shruti Doshi
shruti.doshi@sanghicement.com

Blog managed by
Nirav Pandya
nirav.pandya@sanghicement.com