Clay Bricks
When the term is used in
this sense, the brick might be made from clay, lime-and-sand, concrete, or shaped stone. In a
less clinical and more informal sense, bricks are made from dried earth, usually from clay-
bearing subsoil. In some cases, such as adobe, the brick is merely dried. More commonly it is
fired in a kiln of some sort to form a true ceramic.
(slide 8)
On this slide you can see 3 different types of bricks compared with each other in thechnical
numbers. As you can see Clay brick has somewhat better characteristics, but is also a little bit
more expencive.
The making of bricks (slide 9)
Modern clay bricks are formed in one of three processes soft mud, dry press, or extruded.
Mud bricks
The soft mud method is the most common, as it is the most economical. It starts with the raw
clay, preferably in a mix with 30% sand to reduce shrinkage. The clay is first ground and
mixed with water to the desired consistency
annaabi.ee 
