For more information about COVID-19 please visit: COVID-19 Corona Virus South African Resource Portal
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:
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