Lecture - Superstructure Masonry S16

Lecture - Superstructure Masonry S16 - Lecture Masonry With...

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Lecture Masonry With excerpts from Fundamentals of Building Construction by Edward Allen
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Intro - What is Masonry? Mortar Brick Masonry Class Activity - Inspections Stone Masonry CMU Summary Masonry
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Brick Masonry What is Masonry?
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Brick Masonry
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Brick Masonry
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BRICK MASONRY M ORTAR
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Mortar Mortar Cushions masonry units, ensuring uniform bearing Seals joints between the units, minimizing the flow of air and water
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Mortar Adheres units, providing resistance to lateral forces from wind, earthquakes Mortar
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Mortar In combination with brick, mortar contributes to the appearance of the wall.
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Mortar Portland Cement-Lime Mortar Ingredients: 1. Portland cement 2. Aggregate 3. Hydrated lime 4. Water
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Mortar Mortar Mix Sand provides the basic structural body of the hardened mortar. There is almost one cubic foot of sand in a cubic foot or mortar.
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Mortar Cement is the glue that binds the sand particles together. Lime improves the workability of mortar in its plastic state. Mortar Mix
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Mortar A minimum amount of water is necessary for the chemical hydration of the cement. Additional water is added to produce a good working consistency to the wet mortar. Mortar Mix
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Mortar Admixtures Added ingredients to improve performance or adjust properties: Pigments, colored aggregate Bond enhancers: Improve flexural strength, freeze- thaw resistance
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Mortar Set accelerators and retarders: Adjust setting time in cold or hot weather Water repellents: Improve water resistance Workability enhancers: Ease placement of wet mortar Admixtures
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Mortar Mortar Types: ASTM C270 Increasing the proportion of cement to lime in the mix makes a higher compressive strength mortar. Higher strength mortars are more expensive and have poorer workability characteristics in comparison to lower- strength mortars. ASTM C270 Designation Uses Type M Very high-strength masonry Masonry subject to severe freeze-thaw Masonry in contact with the earth Type S Reinforced loadbearing masonry Exterior veneer subjected to high wind forces or seismic forces Type N Nonloadbearing masonry Exterior masonry not subject to severe lateral loads Type O Interior nonloadbearing masonry Historic masonry restoration Type K Lowest strength Historic masonry restoration (no longer included in ASTM C270 standard)
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Mortar Mortar Types: ASTM C270 In general, the lowest strength mortar suitable for a particular job is the optimal choice. Type S and Type N mortars are the most commonly specified. Mortar types designations, in decreasing order of strength, come from every other letter in the phrase “ MaSoN wOrK ”. ASTM C270 Designation Uses Type M Very high-strength masonry Masonry subject to severe freeze-thaw Masonry in contact with the earth Type S Reinforced loadbearing masonry Exterior veneer subjected to high wind forces or seismic forces Type N Nonloadbearing masonry Exterior masonry not subject to severe lateral loads Type O Interior nonloadbearing masonry
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