Hollow Concrete Blocks
Hollow concrete block is considered an economical alternative to solid concrete block. It can also be used in place of poured concrete (also known as cast-in-place concrete) or traditional wood or steel framing. Concrete blocks allow builders to construct some types of structures more quickly and economically due to the reduced amounts of mortar needed compared to what's needed when building with brick or stone.
Before choosing hollow concrete blocks for your project, it is recommended that you consult a structural engineer or architect in your area for assistance with design.