What is the purpose of surface preparation in concrete finishing?
Surface preparation ensures adhesion of overlays and removes contaminants or laitance.
Which tool is commonly used for initial surface leveling?
A screed is used to level and smooth freshly poured concrete before finishing.
What does a broom finish provide?
A broom finish adds texture to the surface, improving slip resistance.
When should final troweling be done?
Final troweling should be done after water sheen disappears and surface is firm but workable.
What tool is used to create edges on concrete slabs?
An edger tool is used to form clean, rounded edges along concrete joints.
What causes surface laitance in concrete?
Laitance forms from excess water or overworking the surface, resulting in a weak top layer.
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Why is timing critical in surface finishing?
Timing affects the final surface quality; starting too early can cause defects, while starting too late can reduce workability.
Which finishing technique is used for decorative texture?
Stamping uses molds to imprint patterns and textures on the surface of fresh concrete.
Why should finishing not be performed over bleeding water?
Finishing over bleeding water weakens the surface and leads to cracking or scaling.