Precast Concrete Masonry Blocks
These are precast solid concrete blocks embedded with stone spalls, i.e. broken stone pieces (20 to 30% through volume). The concrete is commonly made of 1 part of cement and 9 parts of combined fine and coarse aggregate. The mix is placed in the mould in layers along with stone spalls and compacted.
The blocks are cured for 14 days. The density and strength features are same to that of solid concrete blocks.