Use of hollow concrete block

Hollow concrete blocks are precast concrete units with one or more large voids (cores), usually about 25 to 50 percent of the gross volume. They are made of cement, sand and small coarse aggregate (stone chips up to about 10 to 12 mm).

Uses:

• Load-bearing and non-load-bearing walls of residential and industrial buildings, and infill in RC frames.
• Partition walls, boundary walls and parapets.
• Reinforced masonry: the cores can be filled with grout and steel bars for earthquake resistance.

Because they are large, light and uniform, they are quick to lay, need less mortar, give good thermal and sound insulation and reduce the dead load.