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- Wetting up the concrete so it can be raked or pushed into a location far from where it is discharged is not acceptable.
- Don’t finish the concrete while there is bleed-water on the surface. Using a finishing tool while there is water on the surface will increase water-cement ratio by working the water back into the concrete instead of letting it evaporate. This can cause dusting, scaling and craze cracking.
- Do not use a round edge shovel for spreading concrete since it does not spread the concrete evenly.
- “Strike-off” or screed the concrete as close as possible to its final plane.
- Place the concrete as close as possible to its final destination (concrete weighs approximately 68 kg per cubic foot).
- Bull floating should be finished before excess moisture or bleed-water appears. When floating, lift the leading edge slightly off the concrete surface.
- Excess handling can cause segregation of the course and fine aggregates.
- Don’t use a fresno on the surface soon after screeding – bleed-water and air trapped beneath the sealed surface will create blisters that later break, or a weakened plane that causes sheet delamination.