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Hollow blocks have a void area larger than twenty-five
percent, they come in different shapes and sizes. Hollow blocks are an example,
masonry units made with sand and lightweight ash aggregates used in the
construction world over.
With regards to rib and block slabs, as the name suggests,
the hollow block plays an important component in achieving the low costs
associated with this type of slab. Their primary purpose is to form a permanent
shutter for the concrete that bonds the slab to the lintel. Their structural
value is not as important as the rib or lintel.
Benefits of hollow blocks in a rib and block slab:
- Cost – Of all the slab components, these
structural components main purpose is to form a shutter for the slab, therefore
made with low cost materials compared to the lintels, keeping the overall slab
cost as low as possible.
- Lightweight and
ease – Generally weigh around 20Kg each, therefore can be installed with
ease, and provide less stress on walls and foundations. Polystyrene blocks
provide even further benefits.
- Highly durable – Hollow blocks compacted by high
pressure and vibration make the blocks very strong, resilient hardened to
severe load and weight.
- Great insulation properties -The air in the hollow of the block
does not allow heat or cold in or out of the building. No wonder hollow blocks
are insulated against heat, dampness, and sound. Hollow blocks keep the house
cool in summer and warm in winter.
- Environmentally friendly – It does not pollute or have any
known environment nuisance, it constitutes to the system.
- Bonding of mortar and plaster – Since the surfaces of hollow
blocks are rough, this provides for good bonding between mortar and plaster.
A recent development since 2010 ,
where Royal Concrete introduced
Polystyrene Blocks instead of concrete hollow blocks to the slab, the
polystyrene block provides much more benefits.
See also the Polystyrene rib and block slab by Royal Concrete on our website