What is the main difference between this and IS 2185?

IS 6072 covers reinforced wall slabs (large panels), while IS 2185 covers unreinforced blocks (masonry units).

How is the strength of a wall slab specified?

Strength is verified by a transverse breaking load test on a full slab (Clause 6.1) and compressive strength on cubes cut from the slab (Clause 6.2).

What is the maximum allowed drying shrinkage for these slabs?

The maximum drying shrinkage shall not exceed 0.05 percent (Clause 5.4).

Are there standard thicknesses for these slabs?

Yes, Table 1 specifies preferred thicknesses of 100, 150, 200, and 250 mm.

IS 6072

: 1971

autoclaved reinforced cellular concrete wall slabs

CurrentSpecializedSpecificationBIMMaterials Science · Planning, Housing and Pre-fabricated Construction

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This standard specifies the requirements for materials, dimensions, physical properties, and testing of autoclaved reinforced cellular concrete wall slabs. It covers various grades based on density and compressive strength, intended for use as prefabricated wall panels in building construction.

autoclaved reinforced cellular concrete wall slabs

Quick Reference Values

Maximum drying shrinkage0.05 %

Minimum average compressive strength (Grade 50)50 kgf/cm²

Typical oven-dry density (Grade 50)601 to 650 kg/m³

Tolerance on length± 5 mm

Tolerance on width/height± 3 mm

Tolerance on thickness± 2 mm

Practical Notes

This code is for reinforced slabs, which are different from the more common non-reinforced AAC blocks specified in IS 2185.

Proper corrosion protection for the steel reinforcement is critical due to the high porosity of cellular concrete, as mentioned in Clause 3.2.1.

Handling and storage should be done carefully as per Clause 8 to prevent chipping of edges and cracking of the slabs before installation.