CONCRETE FINISHING

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CONCRETE FINISHING
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Good Vibrations

• There are many ways in which to finish concrete
  in order to get the desired finish.
• One the concrete is poured we need to ensure that
  all concrete faces are smooth and do not show the
  stones or sand that is embedded in the concrete.
• We want the faces to be smooth. This is done by
  vibrating the the concrete forcing the cement to
  the surface.

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Vibrating Concrete Cont

• Increases compressive strength and bond between
  concrete and rebar and decreases concrete
  permeability
• Decreases cold joints, honeycombing, excessive
  entrapped air, and segregation
• Causes concrete within a circular field of action
  to act like a liquid
• Stop Vibrating when
• The concrete surface takes on a sheen
• Large air bubbles no longer escape

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Screeding

• Screeding brings   the   surface   to   the
  required  elevation  by  striking  off  the
   excess  concrete. Two types of screeds are used
  in concrete finishing operations
• Hand screed

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Mechanical Screeding
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Power Floater
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Concrete Finish

• Concrete can be finished in several different
  ways
• Smooth (basements, shop floors)?
• Brushed (sidewalks, steps, porches)?
• Stamped (sidewalks, patios, interior finish)?

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Stamp Concrete

• Stamp concrete is a finish that is applied when
  the concrete has almost completely set up.
• Large stamp pads (with a pattern) are placed on
  the concrete and then stamped to make an
  impression.
• Colour, liquid or powdered is added to give the
  concrete more of a interlocking brick or natural
  surface look.

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