Brick

They may be made clay, shale, soft slate, calcium silicate, concrete or shaped from quarried stone
 * What are they made of?

They are used for mansory construction. Bricks are used for building and pavement. They are also used in the metallurgy and glass industries for lining furnaces
 * What are they used for?

Common brick, face brick, refractory bricks and glazed bricks.
 * How many types of brick are there?

The brick laying techniques are referred to the way that the bricks are used and located to get the best construction.
 * What is the meaning of //brick laying techniques//?

Running Bond: this is the simplest one of the six patterns, consisting of all stretchers. Because the bond has no headers, metal ties usually form the structural bond. The running bond is used largely in cavity wall construction, brick veneer walls, and facing tile walls made with extra wide stretcher tile
 * Describe 2 brick laying techniques

Common or American: is a variation of the running bond, having a course of full-length headers at regular intervals that provide the structural bond as well as the pattern. Header courses usually appear at every fifth, sixth, or seventh course, depending on the structural bonding requirements.

Advantages: brick is cheap Disadvantages: brick is not very strong
 * What are their advantages and disadvantages?