Blocks

What is block?

   A block is a large rectangular brick used in constructing a building. They also known as a concrete masonry unit (CMU) – also called concrete block, cement block, and foundation block. 

  Concrete blocks are made from cast concrete which is the mixture of Portland cement, aggregate, usually sand and fine gravel. Sand and fine gravel are used for high density blocks, whereas industrial wastes are used as aggregate in low density blocks. 

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