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Concrete block
Standard-sized block used in construction / From Wikipedia, the free encyclopedia
"Cinder block" redirects here. For the American singer, see Cinder Block (musician). For the DC Comics character, see Cinderblock (character)
"Breeze block" redirects here. For the British TV series, see Breeze Block (TV series). For the song by Alt-J, see Breezeblocks (song)
A concrete block, also known as a cinder block in North American English, breeze block in British English, concrete masonry unit (CMU), or by various other terms, is a standard-size rectangular block used in building construction. The use of blockwork allows structures to be built in the traditional masonry style with layers (or courses) of staggered blocks.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/0/0d/Concreteblocks.jpg/640px-Concreteblocks.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/3/38/Painted_breeze-cinder_block_wall.jpg/640px-Painted_breeze-cinder_block_wall.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/7/7a/Concrete_Masonry_blocks.jpg/640px-Concrete_Masonry_blocks.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/0/03/A_building_constructed_with_Concrete_Masonry_blocks.jpg/640px-A_building_constructed_with_Concrete_Masonry_blocks.jpg)
Concrete blocks may be produced with hollow centers (cores) to reduce weight, improve insulation and provide an interconnected void into which concrete can be poured to solidify the entire wall after it is built.
Concrete blocks are some of the most versatile building products available because of the wide variety of appearances that can be achieved using them.[1]