HC-Lecture19-PrecastConcrete

HC-Lecture19-PrecastConcrete - Heavy Construction Heavy...

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Heavy Construction Heavy Construction Lecture #19 Lecture #19 Pre-cast concrete L Prieto-Portar 2008
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Pre-cast concrete can be strictly structural, such as this parking garage.
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Pre-cast concrete can also be strictly architectural (that is, aesthetical), such as the external closure panels on this office building.
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Pre-cast elements come in many shapes and uses: a) Pre-cast columns and spandrel beams; b) Pre-cast beams;
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c) Pre-cast hollow-core floors; d) Pre-cast double-tee roof girders (which are also reinforced to provide parking on roof tops);
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e) Pre-cast architectural panels, for cladding and decorative closures.
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Characteristics of Pre-cast Concrete. Advantages: 1) Produced at ground level (increased job safety); 2) Controlled environment (plant versus a jobsite, increased productivity); 3) High quality steel formwork that is reused (increased savings); 4) High strength steel and concrete (larger spans and loads); 5) Controlled curing (high early strength, steam curing, 24-hr cycle); 6) Quicker erection time (no formwork required and no temperature restraints because the concrete has already cured).
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