Presentation on theme: "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."— Presentation transcript:
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.
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
Screeding Screeding brings the surface to the required elevation by striking off the exc ess concrete. Two types of screeds are used in concrete finishing operations: Hand screed
Floating Bullfloating eliminates high and low spots and embeds large aggregate particles immediately after strikeoff. This looks like a long-handled straight edge pulled across the concrete.
Concrete Finish Concrete can be finished in several different ways: Smooth (basements, shop floors) Brushed (sidewalks, steps, porches) Stamped (sidewalks, patios, interior finish)
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.