A brick is a block of ceramic material used in masonry construction and sized to be laid with one hand using mortar..
Bricks may be made from clay, shale, soft slate, calcium… silicate, concrete, or shaped from quarried stone. Clay is the most common material, with modern clay bricks formed in one of three processes - soft mud, dry press, or extruded..
In 2007 a new type of brick was invented, based on fly ash, a by-product of coal power plants..
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 25-30% sand to reduce shrinkage. The clay is first ground and mixed with water to the desired consistency for forming in a mould. The clay is pressed into steel moulds with a hydraulic press. The shaped clay is then fired ("burned") at 900-1000 Â°C to achieve strength. (MORE)