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