Fly Ash Bricks: Price per Brick and per 1,000, Checks and Loads

Fly ash brick price by quantity

Chennai quotes for fly ash bricks in mid-2026 ran from about ₹5 to ₹10 a brick; the spread comes from strength class, curing and whether delivery is included.

Next question: Fly ash or red brick? The comparison is next, with both prices side by side. More

Fly ash bricks vs red clay bricks

Next question: What exactly is in a fly ash brick? Fly ash, lime or cement, sand or stone dust and gypsum, pressed and cured. More

What fly ash bricks are

Fly ash bricks are made from fly ash (the fine ash from coal-fired power stations) with lime or cement, sand or stone dust and gypsum, pressed in a machine and cured instead of fired. They come out grey, sharp-edged and the same size every time.

Their standard is IS 12894. It classes bricks by compressive strength in N/mm² and limits water absorption to 20% by mass for classes up to 12.5.

Next question: Which class should I ask for? Class 7.5 or 10 is what Chennai buyers usually name; your engineer decides. More

Strength class

IS 12894 names classes by minimum average compressive strength, so a class 10 brick averages at least 10 N/mm². Buyers in Chennai usually ask for class 7.5 or class 10; ask the factory for the test report of the batch.

Next question: Is a fly ash brick right for my wall? Mostly for plastered walls; the choices are next. More

When fly ash bricks are the right buy

• Plastered walls in an RCC-framed house: even faces need less plaster.
• 9-inch walls take one brick length across, 4.5-inch walls one brick width; the uniform size keeps the wall true.
• Load-bearing walls only in the class your engineer specifies.
• Exposed brickwork: choose red clay or wire-cut bricks instead.

Next question: How do I check bricks at the gate? Six quick checks follow. More

Six checks when fly ash bricks arrive

1. Look at edges and faces: sharp edges, flat faces and the same size on five bricks taken at random.
2. Strike two bricks together: a clear ring means good compaction; a dull thud means a weak brick.
3. Drop test (site practice): a brick dropped flat from about 1 m onto hard ground should not break.
4. Scratch with a fingernail: a cured brick does not powder.
5. Soak one brick for 24 hours and weigh it before and after; a gain above 20% fails the IS 12894 limit for classes up to 12.5.
6. Ask for the class and the batch test report.

Next question: How many bricks for my walls? About 900 per 100 sq ft of 9-inch wall (typical). More

How many fly ash bricks do you need? Typical estimates

Typical estimates: with 10 mm joints; deduct openings and add about 5% for breakage.

Next question: How many loads for my house? Add up wall areas from the plan, apply the counts above and divide by about 3,000 per 6-wheeler. More

Storing fly ash bricks

• Unload by hand, not by tipping.
• Stack on firm, level ground near the work, no higher than about 1.5 m.
• Sprinkle water on the bricks just before laying; they do not need the long soak clay bricks get.
• Cover the stack in heavy rain so the bricks are not saturated when laid.

Next question: What do buyers get wrong? Uncured batches and size mix-ups, mostly. More

Mistakes to avoid with fly ash bricks

• Accepting a fresh, uncured batch: ask how long it was cured, and run the soak test on the first load.
• Comparing per-brick prices without the size; a smaller brick needs more pieces per wall.
• Mixing fly ash and clay bricks in one wall; they move differently and the plaster cracks at the joint.
• Leaving the stack uncovered through a monsoon week.

Next question: Are red bricks a better fit for my wall? For exposed brickwork, usually yes. More

Fly Ash Bricks: delivered price by area

Delivered price per brick = yard price + freight on about 3 kg a brick from the nearest yard or the Gummidipoondi SIPCOT factories, assuming a full lorry; before GST.

Next question: how much do I need? Quantity calculator · Delivered-cost estimator

How to order fly ash bricks

1. Send the count (or wall area), the class if your engineer named one, and your site location: call, WhatsApp or the quote form.
2. We confirm the price per 1,000, the nearest yard and the delivered price per load.
3. Check five bricks and run the soak test on the first load.