Bricks

=BRICKS= =Why bricks are used in Piazza del Campo= media type="file" key="bricks in piazza del campo.mp3"

=**BRICKS**= Bricks may be made from clay, shale, soft slate, calcium silicate, concrete, or shaped from quarried stone. They can be used for rising buildings and structures and also as pavement. There are mud bricks, dry pressed bricks, extruded bricks and calcium silicate bricks. It is a kind of technique were the bricks are laid one onto one other, using perhaps mortar. The simple one were the bricks are laid on series of line from bottom to top and one used by ancient Romans were brick were cutted into triangles and laid for better resistant. Advantages, they are easy to carry and mount, non expensive, fire and weather resistant. Disadvantages, they aren’t as resistant as other materials, they need mortar and concrete fillings.
 * What are they made of?**
 * What are they used for?**
 * How many types of brick there are?**
 * What is the meaning of brick lying technique?**
 * Describe two brick lying technique?**
 * What are they advantages and disadvantages?**