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Difficulty: EasyConcrete and Masonry Materials

When placing and finishing a standard concrete slab, what is the correct chronological sequence of steps from start to finish?

  1. 1Pour the wet concrete mix evenly into the prepared wooden formwork.
  2. 2Screed the surface with a straightedge board along the top edges of the forms.
  3. 3Float the surface with a bull float or hand float to embed coarse aggregate and level ridges.
  4. 4Cure the slab by keeping it damp or applying a curing compound to allow complete hydration.

Answer

Pouring concrete into forms, screeding with a straightedge, floating the surface, and curing the slab.
Concrete placement follows a logical trade sequence: pouring the material into forms, screeding off excess to establish grade, floating to smooth the paste and embed aggregate, and curing to maintain moisture during the chemical hardening process.

Step-by-Step Solution

1
Place wet concrete into the designated formwork.
The forms are filled to the required depth.
Placing the mix provides the raw material needed to construct the slab.
2
Screed across the top of the forms using a straight board.
High spots are leveled and excess material is cut away.
Screeding creates a flat, even surface aligned with the perimeter forms.
3
Pass a float over the screeded surface.
Coarse aggregate is pushed down and surface paste is smoothed.
Floating prepares the surface for final texture and eliminates marks left by screeding.
4
Maintain surface moisture or apply a curing membrane.
Internal water is retained for ongoing chemical hydration.
Proper curing allows concrete to gain strength and prevents surface shrinkage cracks.

Key Concept

Chronological procedure for placing, striking off, smoothing, and curing concrete flatwork.
Estimated Time:45s
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Topics

Concrete and Masonry Materials

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