Types and benefits of formwork release agents
Releasing agents mean coatings which are provided on the formwork surface, before starting of concreting to allow smooth detachment of the form work or shuttering. Consideration should be given on the finish surface of the shuttering as it reveals all the flaws on the ‘form’ surface like vibrating poker known as ‘burns’, changeable properties in the form-face material, marks of irregular water absorption in timber.
Prior to pour the concrete, loose wire & debris should be cleansed with a compressed air hose. Make sure that steel particles are eliminated since it will create erosion & manipulate the final finish of the concrete.
Benefits of Releasing Agents
- It allows smooth elimination of shuttering.
- Minimize the occurrence of blowholes.
- Supply the recommended surface finish for the concrete member cast.
- Minimize the loss of water from the concrete caused by absorption in timber forms.
- Minimize seepage of water and moisture throughout curing of concrete.
- They safeguard the form work and help in reusing them if possible.
- Minimize the cracks because internal restrains.
Also read : BENEFITS OF USING PLASTIC FORMWORKS IN CONCRETE CONSTRUCTION
Given below, the details of different types of shuttering release agents :-
Mould Release Agent – Cement, Concrete Products
It is a ready to use shuttering oil to discharge molds.
Benefits
- It contains self mould cleaning property.
- It is inexpensive to use.
- It is non toxic and non hazardous.
- It is suitable for several types of moulds & formworks.
- It provides non staining resistance to concrete.
- Minimize the scopes of imperfections on the surface of concrete.
- Enhance the longevity of shuttering.
Mould Release Agent Rubber Mould (MRA-RM)
It is specifically created for rubber moulds.
Benefits
- Self mould cleaning is possible.
- It is non toxic and non hazardous.
- It is suitable for different types of rubber moulds.
- It provides no stain at the end.
Mould Release De Shuttering Oil (DSO)
It belongs to water based mould releasing agent that provides clean, rapid removal of formwork. It offers stain free superior quality of concrete.
Benefits
- Inexpensive to use.
- Water dilute-able.
- Suitable for several types of concrete formworks.
- It does not create any stain.
- It enhances the longevity of wood and steel shuttering.
Chemical Release Agent
These belong to light oils depending on volatile oils which dry the surface providing a thin coating on the shuttering to give protection from water during rains.
Benefits
- It is suitable for different types of formwork.
- It never departs any oily film once it is dry and it provides a safer surface to walk on.
- It does not tack on operatives’ footwear to resist unintended coating on rebar.
- Sufficient rate of coverage as compared to traditional oil.
Mould Cream Emulsion
Devoid of steel formwork, it can be extensively utilized for different types of shuttering. It should be blended intensively prior to use and dilution is not permitted.
Benefits
- Suitable for absorbent surfaces like timber form.
- It offers superior quality finishes.
- It can be used by spraying.
- It can’t be applied for concreting under freezing
- Shelf life is limited.
Neat Oil with surfactant
- Over application may lead to staining of concrete.
- It is not water resistant and oil film may be washed with heavy rain.
- Repeated or constant application minimizes the finish and leaves color changes on finished surface. New and old forms should not be utilized mutually.
These are commonly used release agent for different types of shuttering along with steel formworks.
Benefits