The concrete block which has a core-zero area of more than 25% of the total surface area is known as a hollow block.
Hollow blocks are lighter than conventional concrete blocks. These types of blocks are used for partition walls.
Features of Hollow Blocks:
- They have more than 25% air space of the total block area.
- They are very lightweight compare to traditional concrete blocks.
- Hollow blocks save material cost due to the presence of holes.
- They are very compatible with electrical and plumbing fixtures due to the presence of holes.
Advantages of Hollow Blocks:
- It saves material cost.
- They are very lightweight and easy to transport.
- Placing is easy.
- They provide thermal insulation.
- Hollow blocks are good for sound insulation due to cavity space.
- They are fire-resistant.
Disadvantages of Hollow Blocks:
- Bearing capacity is very poor.
- Compressive strength is less compare to traditional concrete blocks.
Uses of Hollow Blocks:
- Hollow blocks are used for the construction of partition walls.
- They can be used for temporary structures.
Size of Hollow Blocks:
The most common sizes of hollow blocks are as follows:
- 0.40 m x 0.20 m x 0.30 m.
- 0.40 m x 0.20 m x 0.20 m.
- 0.40 m x 0.20 m x 0.10 m.
Note: Size are given as (length x width x height)