Laboratory tests are the final word on quality, but simple field checks catch most bad deliveries before they are used. Train your supervisor to do these on every load.
Cement
- Check the BIS mark and manufacturing week on each bag.
- Feel: it should be smooth and cool, without lumps.
- A pinch dropped in water should float briefly before sinking.
Steel
- Grade and brand rolled on the bar; matching test certificate.
- Bend test sample for ductility if in doubt; weigh bars for size.
Sand
- Silt test: fill a measuring jar with sand and salty water, shake and let it settle; a thick silt layer means dirty sand.
- Rub between wet palms; heavy staining means excess fines.
Bricks and blocks
- Uniform size and colour, sharp edges.
- Two bricks struck together should ring, not thud.
- Soak a brick for 24 hours; it should not absorb too much water.
Concrete
- Slump test on each RMC truck.
- Cube samples tested at 7 and 28 days by an accredited lab.
Tip:Field checks support, but do not replace, the tests your engineer and the applicable IS codes require.
Frequently asked questions
Where can I get materials tested?
NABL-accredited labs, engineering colleges and some government labs test cement, steel, aggregates and concrete.
Can I reject a delivery?
Yes, if it does not match the order or fails checks. Agree rejection terms with your seller before ordering.
This article is general information, written in November 2026, and is not legal, tax or financial advice. Rules, rates and limits change; please confirm the current position with the authority concerned or a qualified professional before you act.
