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CONCRETE FINISHING

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CONCRETE FINISHING 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 ... – PowerPoint PPT presentation

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Title: CONCRETE FINISHING


1
CONCRETE FINISHING
2
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.

3
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

4
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5
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

6
Mechanical Screeding
7
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8
Power Floater
9
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10
Concrete Finish
  • Concrete can be finished in several different
    ways
  • Smooth (basements, shop floors)?
  • Brushed (sidewalks, steps, porches)?
  • Stamped (sidewalks, patios, interior finish)?

11
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.

12
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