What is off form concrete?

The surface finish obtained when concrete is simply struck from its formwork or mould.

What is off form formwork?

Concrete is a common material used for many types of construction due to its strength, durability, water resistance and thermal mass. This is done through what’s called formwork – moulds into which concrete is poured or placed – and the result is referred to as ‘off-form concrete’.

Can I leave concrete forms in place?

The forms or “molding” that holds the concrete in place until it dries should be left alone for at least two days to ensure that the concrete is completely dry. If the forms are removed too soon, the concrete can begin to sag, crack and collapse, especially if conditions like temperature affected its strength.

What is Offform wall?

Off-Form / Board-form Concrete is the name for a process of patterning concrete that leaves a wood grain image on the finished face of the concrete.

What is a Class 2 concrete finish?

A Class 2 finish is intended for external and internal façades that can be viewed in detail. A Class 2 finish is a high quality finish requiring very substantial input by the designer and the precaster. Class 2 finish – covers most good quality architectural precast.

What type of plywood is used for concrete forms?

Virtually any Exterior type APA panel can be used for concrete formwork because all such panels are manufactured with moisture resistant adhesive. For concrete forming the plywood industry produces a special product called Plyform®, which is recommended for most general forming uses.

What is class1 formwork?

only the best quality and new form-face materials are suitable, and the formwork required is of carpentry standard. Class 1 is often specified for residential and public applications where close scrutiny of the finish is possible or the finish is to reflect the importance of the building or structure.

How long should concrete dry before removing forms?

Walls and columns can be removed after about 24-48 hours. Slabs, with their props left under them, can typically be removed after 3-4 days.

What is fair face concrete?

Fair-faced concrete is not plastered or veneered; the simple appearance of the concrete meets aesthetic requirements. Fair-faced concrete refers to concrete surfaces with special requirements in terms of concrete aesthetics and structure.

What is in situ concrete?

Concrete poured into shutters which retain the concrete during setting into its final form and position is termed in-situ concrete. If the concrete is cast in locations which are different from the final positions it is referred to as precast concrete.