4.4_4.3_Masonry%20rev

4.4_4.3_Masonry re - Today LastTimeCMUU TodayBricks Association ClayMasonryUnits Definedas: buildings Brick Hollowclaytile Architectur

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Today Last Time CMU “U” Different types based on ‘finish’ Different units based on location Today Bricks!!!
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Association
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Clay Masonry Units Defined as: Burned clay units used in  buildings. Include the following types: Brick Hollow clay tile Architectural terra-cotta Do not include the following types: Ceramic tile and related material (Div. 9)
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What’s it made of? Clay Three principal forms (different physical  characteristics): Surface Clays Shale (Almost slate like) Fire Clays (Deep Mining, Most Pure)
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How is it produced? Mined, also called winning Crushed  Screened Blending – key for why you want all the  bricks on your job to be produced in one  “run.”
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How is it produced? Tempering – Adding water in “pug mill.” Note term retempering related to mortar Types of Forming: Stiff mud – Bricks are cut off a clay ‘column’ Soft mud – Molds are used, poured and cured Dry press – Low moisture content mix, heat and  pressured cured in steel molds.  Literally ‘pressed.’
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How is it produced? Drying – Dried before ‘fired.’  Moisture  content from production between 5 and 30 %. Glazed (shiny) – High and Low fired  Burning and Cooling –  Burning in kilns Cooling – Heating and cooling are controlled to  avoid color variation and “crackage.” Drawing – Removal for packaging/shipment
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Common Finishes (Textures)  Related to Production Smooth Vertical-Cut (wire cut) Sandmold Sandstruck
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Properties Compressive strength (psi – pounds per  square inch) – Varies between 1500  and 20,000 psi depending on clay and  production method Absorption – “Suction” Does not affect  transfer of water through wall but does  affect the mortar bond Durability – Pore size and salt content
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This note was uploaded on 02/12/2010 for the course BCN 1210 taught by Professor Fobair during the Spring '09 term at University of Florida.

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4.4_4.3_Masonry re - Today LastTimeCMUU TodayBricks Association ClayMasonryUnits Definedas: buildings Brick Hollowclaytile Architectur

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