Specification for cylindrical metal measures for use in tests of aggregates and concrete
1982 Edition

The standard defines cylindrical metal measures with capacities of 3, 10, 15, 20, and 30 litres. Each size has specified inside diameters and minimum wall and bottom thicknesses, with the inside height adjusted to achieve exact volume. For example, the 3-litre measure features an inside diameter of 150 mm ± 1.5 mm, minimum wall thickness of 2.5 mm, and bottom thickness between 4 and 5 mm. Larger sizes such as 15, 20, and 30 litres have reinforced upper sections with wall thickness not less than 5 mm to ensure durability. Tolerances conform to coarse class deviations per IS 2102. These precise dimensions ensure accurate volumetric measurements essential for testing aggregates and concrete.

Cylindrical metal measures should be fabricated from mild steel, preferably adhering to IS 226:1975 standards for structural steel of standard quality. This material choice ensures the containers are water-tight, rigid, and capable of maintaining their shape during testing. For larger capacities (15, 20, and 30 litres), the top 40 mm section must be reinforced with a metal band to achieve a minimum wall thickness of 5 mm, enhancing strength and durability.

To ensure longevity and measurement accuracy, cylindrical metal measures must be constructed from mild steel with a smooth machined interior surface to guarantee volume precision. They must be water-tight and rigid enough to withstand typical handling conditions. For 15, 20, and 30 litre capacities, a reinforcing metal band is required at the top 40 mm to maintain a wall thickness of at least 5 mm. Handles may be included for ease of operation. All dimensional tolerances should comply with the coarse class deviations specified in IS 2102-1969.

Each cylindrical metal measure must bear clear, indelible markings including the manufacturer's name or registered trademark and the date of manufacture. Optionally, these measures may also display the ISI Certification Mark, signifying conformity with Indian Standards and adherence to ISI's inspection and quality control procedures. The ISI mark’s usage is regulated by the Indian Standards Institution (Certification Marks) Act, and manufacturers seeking certification must comply with licensing requirements.

The tamping rod must be constructed from mild steel, have a diameter of 16 mm ± 0.5 mm, length of 600 mm ± 2 mm, and feature a rounded working end to facilitate proper compaction of concrete samples. The tamping bar, also made of mild steel, has a square cross-section measuring 25 mm ± 0.5 mm on each side, a length of 400 mm ± 2 mm, a weight of approximately 2 kg, and is equipped with a handle to aid in use. These specifications ensure uniform and effective consolidation of concrete during testing.