Some information about Floor Screed
Floor screed is a type of building material used in construction to make the floors smooth and flat, the screed made with right quantity of cement and sand.
Introduction
It is a building material that is made from a 1:3 or 1:4.5 ratio of cement with sharp sand and can be applied in both solid-in-situ concrete ground floor slab and onto a formed concrete floor unit. This screed can be directly mixed to the base or laid uncombined onto a fitting damp proof coating which is laid over the slab and also be applied as a floating finish over a layer of firm padding of material. It is best to use with cast-in water pipes to give underfloor heating; they sometime left unfinished or floated to create a smooth surface upon which the specified flooring will be done later.
Some factory mixed the sand and cement to create the screeds and then deliver it to the site with additional quality assurance over site mixed screeds with more firm material. There are some manufacturers in the market, who made pumpable flowing screeds that flows to the last level of finishes and they are anhydrite compounds based on a calcium sulphate binder which can be applied faster than normal screeds in a minimum thickness.
So mainly floor scared is the foundation of the floor finish and immensely influences the work of floor finish; this article will show the different types of floor screed depending on some points that are:
- Type
- Material
- Requirements
- Procedure
- Construction
Types of Floor Screed
There are many types of floor screed which are based on the needs, applications and the functionality of the floor like
- Unbounded screed floor
- Bonded screed floor
- Floating screed floor
- Heated screed floor
Materials for Floor Screed
The screed is dependent of some materials which are used in the time of mixing and they are- Cement, Clean and Sharp sand, Water and sometime accessories are added to know some properties like Polymer materials or metal mesh or glass. All these components are sufficiently mixed as per the prepared material proportions and if the thickness doesn?t match then the proportions will be changed; it is important to know that after drying the proportions will be reduced.
Requirements that a Floor Screed should meet
The floor screeds must have right thickness as per the screed type and application rates and the thickness is dependent on the type of the screed floor and the provided construction conditions.
- The strength of the floor screed has to be 20MPa for domestic application and 30MPa for industrial usage.
- The screeds have to firm and thick enough to provide right base to the floor finish.
- It also e curried well to avoid shrinking and fast drying that causes cracks; that?s why it must be tested under all the shrinkage to prevent the cracks.
- Beside all the above qualities, the surface of the floor screed has to be flat and smooth.
Procedure of Floor Screeding
- Judging the surface of the base
- Calculate materials that are used for screeding
- Create the base and floor screed mixture
- Using bonding agents
- Place the floor screed mixture
- Also properly cure the placed materials
Constructing a successful screed floor
- Always select right and adjustable floor screed mixture
- Then select right screed floor type
- Now make right and fitted floor screed mixture
- Then construct the floor screed with appropriate screed placement process
- Choose right ways for floor screed protection
Source: www.theconstructor.org
