This code provides guidelines for the preparation, laying, finishing, and curing of in-situ cement concrete surface finishes and floor toppings. It focuses on ensuring proper bond with the base concrete, adequate joint spacing to control shrinkage, and correct finishing techniques to achieve durable, crack-free surfaces.
Outlines practices for achieving various types of concrete surface finishes on floors and other surfaces.
Quick Reference Values
Maximum panel area for topping15 sqm
Maximum length to width ratio for panels1.5
Minimum thickness of topping (residential)25 mm
Minimum thickness of topping (industrial/commercial)40 mm
Minimum curing period7 days
Practical Notes
Avoid over-trowelling the surface, as it draws excess cement paste and water to the top, leading to severe shrinkage cracks and dusting.
Ensure expansion and construction joints in the floor topping align exactly with the joints in the base concrete to prevent reflective cracking.
A neat cement slurry should be applied to the mechanically roughened and pre-wetted base concrete just before laying the topping to ensure a monolithic bond.