What is the standard internal volume of the core cutter?

The nominal volume is approximately 1021 cm³ (based on 100mm dia x 130mm height), but it must be measured accurately for each individual cutter before testing.

What is the specified mass of the rammer?

The rammer should have a mass of 9.0 ± 0.1 kg as per Clause 5.

What are the key dimensions of the core cutter itself?

It should have an internal diameter of 100 ± 0.2 mm and a height of 130 ± 0.5 mm (Clause 3).

What is the purpose of the dolly?

The dolly is a 25 mm high collar placed on top of the cutter to prevent damage to the cutter's top edge when it is being hammered into the ground.

IS 13468

: 1992

Apparatus for determination of dry density of soil by core cutter method-

CurrentFrequently UsedSpecificationGeotechnical · Soil and Foundation Engineering

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This standard specifies the material, dimensional, and constructional requirements for the apparatus used to determine the in-situ dry density of fine-grained soils by the core cutter method. It covers the specifications for the core cutter, dolly, and rammer.

Apparatus for determination of dry density of soil by core cutter method-

Quick Reference Values

Internal Diameter of Core Cutter100 ± 0.2 mm

Height of Core Cutter130 ± 0.5 mm

Wall Thickness of Core Cutter3.0 ± 0.1 mm

Internal Diameter of Dolly100 ± 0.5 mm

Height of Dolly25 ± 0.5 mm

Mass of Rammer9.0 ± 0.1 kg

Practical Notes

This standard only specifies the apparatus; the actual test procedure is detailed in IS 2720 (Part 29).

Ensure the cutting edge of the core cutter is kept sharp and free from dents to obtain an undisturbed sample.

The internal volume of each cutter must be precisely calculated before use, as the nominal dimensions have tolerances. This volume is critical for accurate density calculations.