Concrete masonry unit

A concrete masonry unit (CMU) is a large rectangular block used in building construction. Those that use cinders (fly ash or bottom ash) are called cinder blocks in Canada, the United States, and New Zealand, breeze blocks (breeze is a synonym of ash) in the United Kingdom and New Zealand, and hollow blocks in the Philippines. In Australia they are also known as Besser blocks or besser bricks, because the American-based Besser Company is a major supplier of concrete-block-making machinery. Clinker blocks use clinker as aggregate. In non-technical usage, the terms cinder block and breeze block are often generalized to cover all of these varieties.

Concrete masonry unit

A concrete masonry unit (CMU) is a large rectangular block used in building construction. Those that use cinders (fly ash or bottom ash) are called cinder blocks in Canada, the United States, and New Zealand, breeze blocks (breeze is a synonym of ash) in the United Kingdom and New Zealand, and hollow blocks in the Philippines. In Australia they are also known as Besser blocks or besser bricks, because the American-based Besser Company is a major supplier of concrete-block-making machinery. Clinker blocks use clinker as aggregate. In non-technical usage, the terms cinder block and breeze block are often generalized to cover all of these varieties.