RK Copper & Alloy LLP is a reputed supplier of high quality fly ash. We supply high-grade products to diverse industries.

What is Fly Ash?

Fly ash is a fine, powdery residue produced during the combustion of pulverized coal in power plants. This mineral-rich byproduct, removed from flue gases through advanced emission control systems like electrostatic precipitators or bag filters is characterized by excellent pozzolanic properties. When fly ash is added to water it reacts with calcium hydroxide to form cementitious compounds which makes it an essential material for the construction and infrastructure sectors.

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Features and Applications of Fly Ash

Fly ash has special properties such as it is a spherical particle, fine particle size and uniform chemical composition. These attributes make it very useful across a wide range of engineering applications. It is especially used in Portland cement concrete (PCC) as a pozzolanic material that increases durability, decreases water demand and improves workability. Our fly ash is also used for soil modification, structural fills, flowing fills, grouts and as a mineral filler in hot mix asphalt applications. Due to its environmental friendly nature and availability, it is affordable when used in construction industries.

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Whether you’re in construction, infrastructure or industrial sectors, we offer fly ash that are designed to deliver efficiency and sustainability in various applications. Contact us today to know more about our offerings and how we can help make your projects successful.


Fly Ash Specifications :

Standard Compliance :- IS 3812 (Indian Standard), ASTM C618 (US Standard), BS EN 450 (European Standard).
State :- Powdered
Packaging Size :- 25 Kg / 50 Kg (HDPE Bag or PP Bag)
Color :- Grey
Fineness (Blaine) :- ≥ 300 m²/kg
Loss on Ignition (LOI) :- ≤ 5% (max.)
Chloride Content :- ≤ 0.1%
Water Requirement for Normal Consistency :- Specific range as per the standard

Specifications for fly ash in PCC :

      Class F Class C
Chemical Requirements SiO2 + Al2O3 + Fe2O3 min% 701 50
SiO3 max% 5 5
Moisture Content max% 3 3
Loss on ignition (LOI) max% 51 51
Optional Chemical Requirements Available alkalies max% 1.5 1.5
Physical Requirements Fineness (+325 Mesh) max% 34 34
Pozzolanic activity/cement (7 days) min% 75 75
Pozzolanic activity/cement (28 days) min% 75 75
Water requirement max% 105 105
Autoclave expansion max% 0.8 0.8
Uniform requirements2: density max% 5 5
Uniform requirements2: Fineness max% 5 5
Optional Physical Requirements Multiple factor (LOI x fineness)   255 --
Increase in drying shrinkage max% .03 .03
Uniformity requirements: Air entraining agent max% 20 20
Cement/Alkali Reaction: Mortar expansion (14 days) max% 0.020 --

Chemical Compounds and Properties of Fly Ash :

Compounds Fly Ash Class F Fly Ash Class C Portland Cement
SiO2 55 40 23
Al203 26 17 4
Fe2O3 7 6 2
CaO (Lime) 9 24 64
MgO 2 5 2
SO3 1 3 2

Many Industrial Sectors and Application of Fly Ash :

General Concrete, High-Performance Concrete, Mass Concrete, Cement Production, Soil Stabilization, Road Construction, Railway Tracks, Foundation Work, Grouting and Mortar, Construction of Underground Structures, Repair and Rehabilitation, Lightweight Concrete, Geopolymers, Structural Concrete, Waste Management, Environmental Remediation, Asphalt Pavemen, Agricultural Uses etc.

Specialist & India’s Largest Suppliers of

ASTM C618 (US Standard) - Class F, Class C
BS EN 450 (European Standard)
IS 3812 (Indian Standard)


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