What is the maximum lot size for cement supplied in bags?

The maximum lot size is 2000 bags (100 tonnes).

How many bags should be sampled from a given lot?

A minimum of 5 bags or 2 percent of the total bags in the lot, whichever is greater.

What is the minimum mass required for a laboratory sample?

The laboratory sample must have a minimum mass of 5 kg.

IS 3535

: 1986

Methods of sampling hydraulic cement

CurrentFrequently UsedTesting MethodMaterials Science · Cement, Concrete, Aggregates and RCC

Download PDF BIS Portal Google

This standard prescribes the methods for sampling hydraulic cement from bags, bulk storage, and conveyors to obtain representative samples for physical and chemical testing. It details the required equipment, lot sizes, and sample preparation procedures.

Methods of sampling hydraulic cement

Quick Reference Values

Minimum mass of laboratory sample5 kg

Maximum lot size for bagged cement2000 bags (100 tonnes)

Minimum number of bags to sample per lot5 bags

Sampling percentage for large lots2%

Sub-lot size for bulk supply500 tonnes

Practical Notes

Store cement samples in clean, dry, and air-tight containers immediately after collection to prevent moisture absorption and carbonation.

When sampling from bags, use a sampling tube inserted diagonally to draw cement from the core, not just the surface.

Ensure all sampling equipment is perfectly dry before use to prevent blockages and sample contamination.