Hardy Slab
A Hardy Slab is a type of reinforced concrete slab commonly used in construction, particularly in multi-story buildings as part of the floor system. It is constructed using hardy bricks, which are hollow bricks made from concrete hollow blocks. These blocks are used to fill portions of the slab, reducing the overall amount of concrete needed and consequently decreasing the slab's weight.
Hardy slabs typically have a thickness of 2.27 meters, which is greater than that of conventional slabs. The installation method for hardy slabs differs from that of standard slabs. Their application is often observed in regions like Dubai and China.
Hardy slabs are frequently employed in situations where high durability and strength are required. While the term "Hardy Slab" may be specific to certain regions and not widely recognized in all construction practices, it generally refers to a solid, robust slab reinforced to handle the demands of heavy traffic or machinery.
Types Of Hardy Slab
- One-way Hardy Slab
- Two-way Hardy Slab
The Process Of Hardy Blocks Execution is as follows:
1. Formwork is arranged and then shutters are fixed on the formwork.
2. Hardy blocks are placed on the shutter with one brick gap on the entire shutter.
3. The gaps between the bricks are a rib. Reinforcement is provided in a form of the beam within the gap.
4. After placing the rib, the plain steel mesh is placed on the entire slab area resting on ribs.
5. Now pouring of concrete is done on a slab.
Advantages Of Hardy Slab
- Economical for span of length upto 5 m.
- Reduced the quantity of concrete below neutral axis.
- Reduced the weight of the slab compared to conventional slab.
- Hardy slab construction is good where temperature is very high.
Disadvantages Of Hardy Slab
- Costly
- Difficult to repair.
- Difficult to strengthen.
- Required proper handling during transportation, otherwise it get damaged.
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