Note:  Do not rely on this information. It is very old.


Concrete, a composition consisting of some cement as mortar, hydraulic mortar, asphalt, etc., mixed pebble, broken bricks, etc. It sets forming a hard, durable mass, and is largely used for formation of pavements, the foundations of houses, for structures below water, and sometimes even for walls of houses. In the latter case it is filled in between boards, and when set the boards are removed.