Different types of the concrete spacer and their uses- The usage and properties 
If you have little information about the construction industry, you know rebar and the importance of using it. There are two types of rebar; non-ribbed and ribbed rebar, which are used to increase the strength of the concrete against tensile forces. But what should be done to prevent corrosion? It is recommended to use the concrete spacer that is a protection to prevent damage to the rebar. These spacers are highly practical for increasing the life of the structure and its strength. It is better to thoroughly get familiar with different types of this spacer and the use of each type.
The introduction of different types of spacers
These parts are divided into 2 different categories which are discussed in the following:
The evaluation of the spacer with respect to its material
This categorization includes the following items:
The properties of different types of the spacer and their uses
The plastic spacer is the most commonly used in the construction industry. This spacer has a lot of merits and demerits. The merits of this plastic part include cost-effectiveness, lightweight, high variety, and suitable production condition.
The demerits include incoherence with concrete due to the temperature coefficient of the plastic and concrete. This increases the permeability of destructive ions and the moisture in concrete which causes damage. Also, plastic is not adequately resistant to chemical substances.
The properties of the steel spacers and their uses
This type of spacer is a suitable choice with respect to the steel rebar. This metal part which is made of steel completely encloses the rebar without any movement and protects it.
The properties of concrete spacers and their uses
This spacer is more expensive than the plastic spacer and does not have demerits, like non-resisting properties against chemical substances. It should be noted that the temperature coefficient of this type of spacer should be the same as that of the concrete.
The evaluation of different types of the spacer with respect to their uses
The other categorization considered for these parts indicates their use which includes 2 categories:
The horizontal type (floor)
This categorization includes 3 types of spacers as follows:
The most suitable part for horizontal surfaces of heavy work is the hard fix which supports 32 mm rebar and a 350 Kg concentrated load. The Hardshair 50 spacer is one of the strong samples of this model which is suitable for different types of dense floors.
To use this part, the rebar should be a minimum of 14 mm. this product is generally used to build concrete cover in heavy floors, such as beams, ties, foundations, and industrial flooring. This spacer has 2 locking horns which simply encloses rebar of different size and protect them.
Hardchair 75 is one of the most commonly used spacers. This spacer is vertically placed under the rebar. It is noteworthy that the number of the Hardchair indicates its concrete cover and supports the different sizes of rebar. For example, Hardchair 30 spacer; has 30 concrete covers and supports the rebar of size 12 and 32 mm. Therefore, it is necessary to take enough consideration when buying the product.
This type of spacer is used to develop the concrete cover in beams for semi-heavy structures. The load withstood by this part is approximately 180 Kg and supports the 8 to 22 mm rebar. The Maxichair 25 spacer is one of the samples of this group.
The Minifix type
This type is one of the cheap and most widely used models in the market which is suitable for different types of roofs, the floors are built with lightweight rebars like steel deck, composite roof, and pre-cast sections.
The smallest produced model is Fixchair 25 Spacer which is suitable for completely lightweight structures. The Minifix type is the most commonly used part among all types since they are cost-effective and suitable for 6 to 14-mm rebar.
The Fixchair 30 is one of the widely used types. These parts withstand an approximate 35 Kg concentrated load, and they are vertically placed under the rebar.
Ufix
This spacer has a chair seat, therefore, the locking horns are not installed in this spacer. Hence, rebar with different sizes can be placed inside the spacer. This spacer is mostly used for medium-weight structures since they can only withstand a 200 Kg concentrated load.
Doublefix
This spacer is used for concrete roofs with relatively high thicknesses.
Sidefix
These spacers are suitable for beams and semi-heavy floors since they withstand 200 Kg weight and support 12 to 25 mm rebar.
Flatbar
This spacer is used in the intersection of the two rebar or soft spaces. The suitable rebar for this spacer is an 8 to 16 mm rebar.
Flatfix
This spacer is barely used since it weakens the flat plate beneath.
The wall type (vertical)
The Wheelbar 50/10-20 is one of the most popular concrete spacers which is also called wheel type. The wall spacers are generally divided into the following categories:
Wheelfix
This spacer is usable on vertical surfaces and develops a 15 to 100-mm concrete cover.
Cagefix
These parts are used on heavy vertical surfaces. They also develop a concrete cover for the rebar than the soil.
Wheelsun
The Wheelsun is also called the solar-type. This spacer is usable for medium-weight vertical surfaces and its most important property is that it does not have an external indentation.
The price of spacers
As mentioned above, the plastic type is cheaper and more cost-effective. The factor to be considered when buying the spacers is not only the price but also the quality is of high importance.
The spacer is responsible for increasing the structure strength, but it is inefficient to use it if the product does not have good quality and efficiency. Therefore, it is necessary to find a producer that not only supplies cost-effective spacers but also spacers with high quality.
The Hamgerayan Production Company (Capco) with years of experience in the production of these parts can help you to purchase the most suitable spacer which is the best choice for your structure after considering and gaining enough information about these parts. You can contact the Company at 021-88925903 or 021-89331. You can also purchase your product online from the Website of Company.
Conclusion
The spacer is a concrete spacer that is used to prevent damage and corrosion of the rebar in different structures. This spacer is divided into different categories in terms of material and its use. In terms of material, the spacer includes different types such as plastic, concrete, and metal all of which have special advantages. In terms of its use, the spacer has been divided into 2 horizontal and vertical or floor and wall categories.
The different types of these subcategories include Hardfix, Maxfix, Minifix, and also, the Wall types spacers such as Wheelbar, Wheelsun, and Wheelfix.