WHY USE CONCRETE SPACERS?
Why You Should Use Fiber Concrete Spacers In R.C.C Structures?
A cover block is basically a spacer that is used to lift the rebar matrix off the ground so that concrete may flow below the rebar.
When doing RCC work it is important to embed the steel in the concrete (also known as cover) so that the rebar doesn’t corrode and to provide fire protection to the rebar If we don’t provide the recommended cover the rebar will corrode with time and will ultimately result in premature failure of the structure. Thus using cover blocks enhances the life of the structure significantly without adding much to the cost.
Concrete Spacer Bonds with Concrete
Consequences of using plastic spacers instead of concrete spacer. Vulnerable to corrosion and the concrete to early deterioration.
Disadvantages of cover blocks made at site
PVC spacers are also available but these are foreign body materials to concrete, fails to essentially form a permanent bond with concrete. Thermal coefficient of expansion is different with concrete.
Fiber Concrete Spacers have better bonding with surrounding concrete as it is made from the same material. Any gap between the PVC and CC to the structure will permit water seepage, ultimately the steel will get corroded or loose its strength and purpose.
Due to this hair cracks develop between plastic and concrete surface, which allow entry of corrosive gases, which in turn accelerates corrosion.
The use of plastic spacers should be avoided to as extent as possible. The PVC blocks will not be removed from the structure before plastering, hence in case of fire they will melt down and building will be at risk.
While the very purpose of this is beaten, they do not offer any strength besides being porous seriously impacting the very strength of the constructed structure. In accordance with BS 8110-1, concrete spacers shall not be made on the construction site. Furthermore, site made spacers allow ingress of water vapor and gases and their strength is below 10 Mpa.
Advantages of Fiber Concrete Spacers
Getting the right amount of Fiber Concrete Spacers is essential for the durability of reinforced concrete structures. Fiber Concrete spacers ensure correct Fiber Concrete Spacers before and during concreting. They are characterized by high compressive strength and excellent chemical and physical resistance.
The spacers fulfil the requirements of all exposure classes. All recipes used are tested by independent testing institutes with regard to the required properties.
Fiber Concrete Spacers prevent rebar's from corrosion, protect them from fire to certain length of time and help to provide proper transfer of stresses from concrete to steel rebar's, by helping provide proper cover to rebar's. Fiber Concrete spacers are made from high strength, Fiber Reinforced Concrete in a factory with strict quality control.
High density with low porosity
High load-bearing capacity
Fiber Concrete Spacers are better since they can easily bond with the poured concrete, Since Fiber Concrete spacers have similar thermal expansion properties as the surrounding concrete, the likelihood of cracks forming between the spacer and concrete is significantly reduced.
Easy to install with binding wire, clips etc.