What is a concrete Jacketing? While studying detailed drawings of sections of reinforced concrete elements or preparing tables for the inventory and individualization of reinforcing steel, you will encounter the term concrete cover. The concrete Jacketing is the thickness of the concrete surrounding the reinforcing bars. It has terms and conditions that vary depending on the type of item and the surrounding environment.
Everyone checks during the receipt of the various concrete works on the size of the concrete cover, as it protects the reinforcing bars from weather factors and prevents and reduces the chances of rust and corrosion.
Various methods are available for measuring concrete cover, and other terms such as net cover, nominal cover, and effective Jacketing are used to define this.
What is a clear concrete cover?
It is the measured distance between the outside exposed concrete surface and the nearest surface of the steel reinforcement.
What is a nominal concrete cover?
According to the construction standard, the term net cover follows the term nominal jacketing.
The nominal covering is the measured distance between the exposed concrete surface and the nearest rebar, up to the beam cantilever. It should not be less than the diameter of the largest armature.
Which concrete cover is sufficient or not in design calculations?
Unlike elements subjected to compressive forces such as columns, the sufficient concrete cover is used primarily in design calculations but neglected minus. It is the measured distance between the exposed concrete surface and the midpoint of the steel reinforcement. (or) It is the distance measured between the outer face of the reinforced concrete member and the midpoint of the tension reinforcement zone.
Disadvantages of increasing concrete JAcketing
No doubt that increasing the concrete cover increases the protection of reinforcement and fire resistance, but if this cover exceeds the permissible limit, which is approximately 75 cm, cracks or cracks will occur in this area. Cracks will increase the chances of rust and reinforcing corrosion, shedding the cover, cladding, finishes, and distorting the aesthetic appearance.
concrete cover falling
The steel reinforcement rusting process cuase falling of concrete jacketing. The reinforcing rod bulges and causes pressure and thrust causing the concrete cover to fall off. It often occurs in poorly insulated bathroom tiles and roofs exposed to rain without proper waterproofing.
What is the purpose of the concrete cover? What is the importance of the concrete jacketing?
- Engineers provide Jacketing to restrain the attack of corrosion or rust on the rebar. Reinforcing bars are subject to corrosion and fire due to weather conditions.
- If we do not provide a suitable concrete covering, there is a high possibility of rust and cracks in the hardened concrete sections.
- The concrete covering also protects the rebar from fire.
- The cap is also necessary to develop sufficient bonding force along the surface area of the rebar skewer.
- Concrete covering is necessary for each building element (slabs, beams, plinths), where iron is present.
- Engineers use concrete Jacketing to maintain the correct arrangement of the steel bars and to provide a cover around these bars.
Source: wikipedia.org/wiki/Reinforced_concrete
Read More: buildineg.com/public/blog/what-is-a-concrete-jacketing-of-column/
