Industrial Fuels
  Fly Ash  
Fly Ash
Limestone & Slag


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Fly ash is a by-product produced while burning finely ground coal in a boiler to produce electricity. Physically, fly ash is a very fine, powdery material, composed mostly of silica. Nearly all particles are spherical in shape. Fly ash is a pozzolan, a siliceous material which in the presence of water will react with calcium hydroxide at ordinary temperatures to produce cementitious compounds. SiO2, Al2O3, Fe2O3 and occasionally CaO are the main chemical components present in fly ashes.

Description of our Dry Fly Ash

Our Fly Ash is a quality assured fly ash (Full compliance to ASTM C618 Class-F / Class-C, BS 3892 Part-1, BS EN 450 and IS 3812) suitable to use in all concrete to improve the strength, stability and long-term durability of concrete. Under normal conditions, our Fly Ash is used to replace 15-35% of Portland cement by weight. Fly Ash can also be added without cement reduction to achieve desired mix characteristics. Tests made in accordance with ASTM C 441 and ASTM C 1012 have shown that the use of our Fly Ash significantly reduces the potential for damage due to alkali-aggregate reactivity and sulfate attack. Depending on the quantity of ash used, the use of our Fly Ash consistently provides a 10% or greater reduction in the amount of water required for a given workability. This translates directly into increased strength and durability, reduced potential for shrinkage, reduced segregation, and most importantly, lower permeability.  

Origin, Delivery, Packaging and Quantity

The origin of our Fly Ash is India. We can deliver our Fly Ash in terms CFR, CIF or DAP to your destination via containers or dry bulk vessels. The packaging options are jumbo bags (for containers and dry bulk vessels) and loose dry bulk (for dry bulk vessels). The quantity that we can supply on monthly basis is 30k – 40k MT.


Properties Unit Typical Performance Fly Ash ASTM C 618
Class F
BS 3892 /
BS EN 450
IS 3812
Loss of ignition % 3 Max 6 Max 7 Max / 5 Max 5 Max
SiO2 Silicon Dioxide % 45-55      
SiO2 + Al203 + Fe203 % 75-85 70 Min 70 Min (both) 70 Min
SO3 Sulfur Trioxide % 1 Max 5 Max 2 Max / 3 Max 3 Max
CI Chloride % 0.01   0.1 Max (both) 0.05 Max
Na20 Sodium Oxide Alkali % 1.5 Max   5 Max
(BS EN 450)
1.5 Max
MgO Magnesium Oxide % 2.5-3.0      
Autoclave Expansion % 0.8 Max 0.8 Max 10 mm / 1 Max 0.8 Max
(retention on 45 micron / 325 sieve)
% 20 Max
BS EN 450 N)
12 Max
(BS 3892,
BS EN 450 S)
34 40 Max N Type
12 Max S Type
34 Max
Moisture % < 1 3 Max 2 Max (both) 2 Max








Delivery can be arranged in terms FOB or CFR/CIF to any safe destination in the world, as per Incoterms 2010. The average shipment size is of the order of 50kt.

The cargo inspections are undertaken by global qualified cargo inspection companies.  

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