Is IS 7325:1974 still valid?

No, it has been superseded and merged into IS 1199 (Part 3):2018. The new standard should be used.

What are the two main types of apparatus specified in this code?

The code specifies apparatus for the Buoyancy Method (Clause 2) and the Siphon-Can Method (Clause 3).

What is the purpose of the apparatus described in IS 7325?

The apparatus is used to determine the actual quantities of cement, water, and aggregates in a sample of fresh concrete, also known as concrete analysis or cube testing.

What is the specified size of the container for the buoyancy method?

The internal diameter and height should both be approximately 350 mm, with a tolerance of ±25 mm, as per Clause 2.1.

IS 7325

: 1974

Specification for apparatus for determining constituents of fresh concrete

CurrentSpecializedSpecificationMaterials Science · Cement, Concrete, Aggregates and RCC

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This standard specifies the requirements for the apparatus used to determine the constituents of a fresh concrete mix. It covers two primary methods: the buoyancy method and the siphon-can method, detailing the dimensions, materials, and construction of the necessary equipment to ensure consistent and accurate testing.

Specification for apparatus for determining constituents of fresh concrete

Quick Reference Values

Buoyancy method container internal diameter350 ± 25 mm

Buoyancy method container internal height350 ± 25 mm

Standard tamping rod diameter16 mm

Standard tamping rod length600 mm

Siphon-can nominal capacity20 litres

Siphon-can container min. capacity0.03 m³

Practical Notes

This standard has been superseded and merged into IS 1199 (Part 3):2018. Always refer to the latest standard for current practices and compliance.

The accuracy of the test results is highly dependent on the precise dimensions and calibration of the apparatus as specified in this code.

These methods provide a physical means to verify the actual proportions of materials in a fresh concrete batch, serving as a crucial quality control check.