What are the internal dimensions of the linear shrinkage mould?

140 mm (length) x 12.5 mm (width) x 12.5 mm (height) as per Clause 3.1.

What material should the mould be made from?

Brass or any other suitable non-corrodible metal of adequate strength, as specified in Clause 2.1.

What is the tolerance on the mould's dimensions?

A tolerance of ±0.2 mm is permitted on all specified dimensions (Clause 3.1).

Which test method uses this mould?

This mould is designed for the determination of linear shrinkage of soil as described in IS 2720 (Part 20).

IS 12979

: 1990

Mould for determination of linear shrinkage -

CurrentSpecializedSpecificationGeotechnical · Soil and Foundation Engineering

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This standard specifies the material requirements and dimensions for the mould used in the determination of linear shrinkage of soils. The mould is a trough-shaped bar, typically made of brass, used as per the test method in IS 2720 (Part 20).

Mould for determination of linear shrinkage -

Quick Reference Values

Internal length of mould140 mm

Internal width of mould12.5 mm

Internal height of mould12.5 mm

General tolerance on dimensions± 0.2 mm

Practical Notes

Ensure the internal surfaces of the mould are coated with a thin layer of grease or petroleum jelly before placing the soil paste to prevent sticking.

The dimensional accuracy is critical for the test result; inspect the mould for any warping or damage before use.

This apparatus is specifically for the test procedure outlined in IS 2720 (Part 20) - Determination of linear shrinkage.