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By - Phuwanat Sangkhayanon 5310751259 - Preutipong Mongkolkijngam 5310755060

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A brick is a block of caramic material used in masonry construction, usually laid using various kinds of mortar.

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Methods of manufacture Brick making at the beginning of the 20th century. 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. ingredients: Silica (sand) - 50% to 60% by weight Alumina (clay) - 20% to 30% by weight Lime - 2 to 5% by weight Iron oxide - 5 to 6% (not greater than 7%) by weight Magnesia - less than 1% by weight

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Solf Mud bricks - Soft Mud Method is the most common. Raw Clay + 25-30% Sand + Water The shaped clay is then fired ("burned) at 900-1000 C to achieve its strength, But i n modern brickworks, this is usually done in a continuously fired tunnel kiln.

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Dry pressed bricks - Similar to mud brick but starts with a much thicker clay. - It forms more accurate, sharper-edged bricks. - Greater force in pressing and the longer burn - Make this method more expensive

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Solid (left) and hollow extruded brick.

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Extruded bricks - Clay with 10-15% water (stiff extrusion) or 20-25% water (soft extrusion). - Most structural bricks are made by this method, as it produces hard, dense bricks. - Hollow in bricks are lighter and easier to handle, and have thermal properties different from solid bricks. - Cut bricks are hardened by drying for 20 to 40 hours at 50 to 150 C

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Application Bricks have been used for building and pavement for centuries. Until recently, almost all houses were built almost entirely from bricks. Although many houses are now built using a mixture of concrete blocks and other materials, many houses are skinned with a layer of bricks on the outside for aesthetic appeal.

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Characteristic Of Good Brick - Good Thermal Shock Resistance - Refractoriness Under Load - High Melting Point - Satisfactory Porosity.

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References http://en.wikipedia.org/wiki/Brick http://www.thailand- world.com/Ang-Thong-Brick.html