A concrete
block is primarily used as a building material in the construction of walls. It
is sometimes called a concrete masonry unit (CMU). A concrete block is one of
several precast concrete products used in construction. The term precast refers
to the fact that the blocks are formed and hardened before they are brought to
the job site. Most concrete blocks have one or more hollow cavities, and their
sides may be cast smooth or with a design. In use, concrete blocks are stacked
one at a time and held together with fresh concrete mortar to form the desired
length and height of the wall.
.modal-dialog{max-width: none;}
.MsoNormal img{padding-left: 20px; padding-top: 7px;}