What is the minimum thickness for a granolithic floor finish?

20 mm if laid monolithically with the base concrete, and 40 mm if laid over a set and hardened base course.

What is the standard mix proportion for granolithic concrete?

The mix typically ranges from 1:2 to 1:3 (cement to granolithic aggregate) by volume, depending on the required heavy-duty performance.

Which types of aggregates are recommended for granolithic finishes?

Hard, tough, and abrasion-resistant aggregates such as granite, basalt, or quartzite are required.

IS 2507

: 1986

Code of Practice for Granolithic Concrete Floor Finish

CurrentSpecializedCode of PracticeArchitectural · Flooring and Paving

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This code covers the materials, mix proportions, and laying methodology for granolithic concrete floor finishes to achieve a hard-wearing and abrasion-resistant surface. It details the preparation of the base, application of the topping, trowelling techniques, and curing processes necessary to prevent delamination and surface cracking.

Provides recommendations for the application of granolithic concrete as a durable floor finish.

Quick Reference Values

minimum thickness monolithic20 mm

minimum thickness hardened base40 mm

mix proportion cement aggregate1:2 to 1:3 by volume

maximum aggregate size10 mm or 12.5 mm

minimum curing period7 days

Practical Notes

For the best bond and to minimize required thickness, granolithic topping should ideally be laid monolithically with the base concrete before it has fully set.

If laying on a hardened base, the base must be thoroughly hacked, cleaned, and wetted, followed by a cement slurry coat to ensure proper adhesion.

Excessive trowelling must be avoided as it brings cement paste and water to the surface, causing laitance and drastically reducing the floor's abrasion resistance.