Bricks

Bricks "Bricks" for building may be made from [|clay], [|shale] , soft slate, [|calcium silicate] , concrete, or shaped from quarried stone. However, true bricks are ceramic, and therefore created by the action of heat and cooling. Clay is the most common material, with modern clay bricks formed in one of three processes - soft mud, dry press, or extruded. The bricks are used in construction fences, walls and partitions. It is mainly used to build walls or partitions. Although bone can be placed, it is usually received with mortar. The arrangement of the bricks in the wall known as rigging, there are a great variety of them. ===There are 4 types of brick Mud bricks, Dry pressed bricks , Extruded bricks, Extruded bricks=== Bricklaying is a skilled trade that takes many years to master. Bricks are laid in courses, on a bed of mortar, with a taut string linesed as a guide to line and level. The horizontal joint is the "bed joint"; the vertical joints are "perpends".
 * What are they made of?
 * What are they used for?
 * How many types of brick are there?
 * What is the meaning of //brick laying techniques//?

The ends of walls are built first, with the level and verticality of the bricks checked repeatedly as the corners/ends are raised. The gauging is also checked, to ensure that 4 courses measures 300mm. __ Stretcher Bond __ is the easiest bond to lay and minimises the amount og cutting required. It can be used for single skin walls quite easily. When used as a double skin wall, the two skins are locked together across the collar joint by means of wall ties.
 * Describe 2 brick laying techniques

__The English Bond__ is a traditional bond dating back hundreds of years and features alternating courses of stretchers and headers.This is one of the strongest brickwork bond patterns. The masonry is used for the construction of structures with bricks being these economical and durable, but these techniques have long to complete.
 * What are their advantages and disadvantages?