Brick

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Bricks are made of ceramic material. They can also be made from clay, shale, soft slate, calcium silicate, concrete, or shaped from quarried stone. Normally, brick contains the following ingredients: =====

Normally, brick contains the following ingredients :

 * 1) =====Silica (sand) - 50% to 60% by weight =====
 * 2) =====Alumina (clay) - 20% to 30% by weight =====
 * 3) =====Lime - 2 to 5% by weight =====
 * 4) =====Iron oxide - 5 to 6% (not greater than 7%) by weight =====
 * 5) =====Magnesia - less than 1% by weight =====

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There are five types of brick. There are: mud bricks, rail kilns, bull´s trench kilns, dry pressed bricks, extruded bricks and calcium silicate bricks. =====

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Bricklaying is a trade that specializes in building and repairing walls, floors, partitions, fireplaces, chimneys, as well as other structures with brick or concrete block. A bricklayer may use their skills for residential or large commercial development projects. Additionally, bricklayers may also refurbish brickwork on restoration projects. =====

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The **running** bond is the simplest of the six patterns, consisting of all stretchers. Because the bond has no headers, metal ties usually form the structural bond. The running bond is used largely in cavity wall construction, brick veneer walls, and facing tile walls made with extra wide stretcher tile. =====

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The **common, or American**, bond is a variation of the running bond, having a course of full-length headers at regular intervals that provide the structural bond as well as the pattern. Header courses usually appear at every fifth, sixth, or seventh course, depending on the structural bonding requirements =====

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Brick is a constructing material with many advantages. It is very durable, easy to get, resistant to fire and it is very pleasant no look at. But it has also many disadvantages. As it is made of ceramic, is very vulnerable to shocks and frontal forces, and it does’nt resists more weight than its one. =====



**Write on your brick wiki page: "What construction material would you use to build your own house? Why?** **To build my house I´d probably use brick as a construction material. Of course a house needs a structure made of steel or concrete because they're very resistant to vertical and horizontal forces, but extern and intern walls would be made out of brick because it is a vey easy material to work with and it´s very durable.**  <span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;"> <span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;"> <span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;"> <span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;">**Find out the meaning of the expressions below**

1. Brick upon brick

2. Brick & mortar

<span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;">Refers to 2 things that can't be separated from each other.

<span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;">3. Be /come up against a brick wall

<span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;">Refers to an obstacle can not move forward.

<span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;">4. Come down on somebody like a ton of bricks

<span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;"> R efers to a story or some event that is very strong and appears very quickly, surprising the person.

<span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;">5. Drop a brick

<span style="font-family: Arial,Helvetica,sans-serif; font-size: 90%;"> R efers to a person who is verty indiscreet.