<P> Those that use cinders ( fly ash or bottom ash ) are called cinder blocks in North America , breeze blocks ( breeze is a synonym of ash ) in the United Kingdom , and hollow blocks in the Philippines . In New Zealand they are known as concrete blocks or more commonly as just blocks . In Australia they are also known as Besser blocks or Besser bricks , because the American - based Besser Company was 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 . </P>
<P> Those that use cinders ( fly ash or bottom ash ) are called cinder blocks in North America , breeze blocks ( breeze is a synonym of ash ) in the United Kingdom , and hollow blocks in the Philippines . In New Zealand they are known as concrete blocks or more commonly as just blocks . In Australia they are also known as Besser blocks or Besser bricks , because the American - based Besser Company was 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 . </P>
large concrete or cement masonry units for building
large concrete or cement masonry units for building
cinder blocks
cinder blocks