What is the specified mass of the cone assembly?

The total mass of the cone and its sliding shaft must be 80 ± 0.1 g (Clause 4.1.3).

What is the required angle for the cone?

The cone apex angle must be 30° ± 30' (Clause 4.1.1).

Is this standard still active?

No, it has been superseded. The specifications for the equipment are now included in IS 2720 (Part 5):1985.

What is the required resolution of the penetration measurement gauge?

The gauge should permit measurements to be read to an accuracy of 0.1 mm (Clause 4.2.1).

IS 11196

: 1985

equipment for determination of liquid limit of soils cone penetration method

CurrentSpecializedSpecificationGeotechnical · Soil and Foundation Engineering

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This standard specifies the manufacturing and dimensional requirements for the cone penetrometer apparatus used in determining the liquid limit of soils. It details the dimensions, mass, materials, and construction of the cone assembly, penetration gauge, and sample cup to ensure consistent and accurate test results.

equipment for determination of liquid limit of soils cone penetration method

Quick Reference Values

Total mass of cone and sliding shaft80 ± 0.1 g

Cone apex angle30° ± 30'

Penetration gauge resolution0.1 mm

Sample container internal diameter50 mm

Sample container internal depth50 mm

Practical Notes

This standard is superseded; its requirements are now incorporated directly into IS 2720 (Part 5), which covers the complete test method.

The sharpness, smooth finish, and mass of the cone assembly are critical for repeatable results. Any damage or wear will significantly affect readings.

This standard is primarily used by equipment manufacturers and calibration laboratories, not by field or lab engineers performing the test.