What are the primary raw materials allowed for these blocks?

Building lime conforming to IS 712 and pozzolanic materials such as fly ash conforming to IS 3812.

What is the acceptable maximum water absorption for lime based blocks?

Generally restricted to a maximum of 20% by mass to ensure durability and good mortar adhesion.

Where are lime-based blocks primarily used?

They are mostly used in low-rise load-bearing masonry, partition walls, and non-load-bearing panel walls.

IS 3115

: 1992

lime based blocks

CurrentSpecializedSpecificationMaterials Science · Building Limes and Gypsum Products

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This standard specifies the requirements, dimensions, and testing methods for solid and hollow lime-based masonry blocks. It covers blocks manufactured using building lime, fly ash, and other pozzolanic materials intended for use in load-bearing and non-load-bearing walls.

lime based blocks

Quick Reference Values

Standard nominal length390 mm

Standard nominal height190 mm

Standard nominal widths190 mm, 90 mm

Maximum water absorption20% by mass

Compressive strength range2.0 N/mm² to 3.0 N/mm² (depending on grade)

Practical Notes

Lime-based blocks gain strength more slowly than Portland cement-based blocks; adequate curing time is essential before testing or use.

Because of potentially high water absorption, blocks may need to be lightly pre-wetted before laying to prevent them from absorbing water from the mortar.

These blocks serve as an eco-friendly masonry alternative by utilizing industrial by-products like fly ash.