name ________________ unit 6/p6 – concrete construction expensive heavy and dense = strong, sound...
TRANSCRIPT
Name ________________Unit 6/P6 – Concrete Construction
• Expensive• Heavy and dense =
strong, sound proof and thermally efficient.
• Cast in situ or pre-cast
• High skill level• Taller structures
possible.
• Piled foundations or pad in poor subsoil conditions
• Formwork is key element of shape
• Any shape can be formed
• Rebar• Must not touch air
• Concrete poured between formwork and after rebar
• Pump trucks and tower cranes used to supply concrete
• Slump test• Strength of concrete
can vary, measure in PSI
• Formwork is moved up a floor at a time.
• Used to be timber now metal.
• Concrete can be poured to a pre marked level, normally the top of the formwork or a set thickness.
Name ________________Unit 6/P6 – Concrete Construction
• Concrete needs to be vibrated into place
• More water allows concrete to flow into more complex shapes but will take longer to dry.
• 5 days or more to cure.
• Weather can affect drying time
• Not below 4 degrees unless using accelerant
• Building normally clad in brick, timber or metal
• Normally flat roofed
• Wall openings need to be part of formwork, nit cut after.
• Internal walls are partition
• Need deflection header due to flex of floor
• Service duct / tunnel between floors
• Dry riser required above 18m – fire service limitations
Unit 6/P6 – Concrete Construction