lec20 - Concrete "Concreting the environment" Exposed...

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Concrete "Concreting the environment" Exposed concrete ± Internal composite structure hidden ± Surface’s texture = formwork
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Concrete Formwork and concrete texture
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Concrete Concrete material ± Cement ± Water ± Aggregates (fine and coarse) Cement Water Fine agg. Coarse agg. Cement Water Air Fine agg. Coarse agg. Cement Fine agg. Coarse agg. Percentage by surface area Percentage by volume Percentage by weight 9-18 6-9 23-35 33-35 7-15 2-6 22-32 30-48 93-95 4-6 0.5-1 14-19 Image by MIT OCW.
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Concrete Concrete material ± Cement ­ Extraction and breaking-down ­ Mixing and crushing, drying Æ dust ­ Heating Æ clinker ­ Grinding, sometimes adding of mineral substances
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Concrete Reinforced Concrete ± Concrete for compression, steel for tension ± Steel at maximal bending moments ± Compacting Concrete already compacted Level of concrete before compaction Image by MIT OCW.
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Concrete Concrete building elements ± Beams Unloaded Unloaded Reinforced Loaded Loaded Prestressed Image by MIT OCW.
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This note was uploaded on 12/11/2009 for the course ARCHITECTU 4.401 taught by Professor Marilyneandersen during the Spring '06 term at MIT.

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lec20 - Concrete "Concreting the environment" Exposed...

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