Product: Pulverised Fly Ash
HSN Code: 26219000
Origin: India
Grade: Class F & Class C
Certifications: relevant certifications, including ASTM C618
Packaging Details: Bulk/Jumbo bags, customizable.
Shipping: Ex-works/FOB/CIF, based on buyer's preference.
Volume: 50,000 MT+/ month
Lead time: 30 days, negotiable
Class F fly ash is designated in ASTM C 618 and originates from anthracite and bituminous coals. It consists mainly of alumina and silica and has a higher LOI than Class C fly ash. Class F fly ash also has a lower calcium content than Class C fly ash.
Replacement
When used in portland cement, Class F fly ash can be used as a portland cement replacement ranging from 20-30% of the mass of cementitious material.
Advantages
When used as a portland cement replacement, Class F fly ash offers the following advantages when compared to unmodified portland cement:
Increased late compressive strengths (after 28 days)
Increased resistance to alkali silica reaction (ASR)
Increased resistance to sulfate attack
Less heat generation during hydration
Increased pore refinement
Decreased permeability
Decreased water demand
Increased workability
Decreased cost ($80/ton for portland cement vs. $30/ton for fly ash).
Fly ash is a siliceous or siliceous and
aluminous material that, by itself,
possesses little or no cementitious value.
In the presence of water, however, fly ash
chemically reacts with calcium hydroxide
released by hydration of Portland
cement to form compounds possessing
cementitious properties. This can result
in a denser, durable concrete.
Fly ash also can be used to improve concrete workability,
decrease permeability, reduce sulfate attack, decrease
bleeding and segregation, reduce shrinkage, reduce heat
of hydration, increase compressive strength and increase
flexural strength. Fly ash is suitable for a variety of concrete
construction applications from general construction to
dams, piers, massive mat placements, footings and similar
structures.
Fly ash is a by-product produced while burning finely ground coal in a boiler to produce electricity. It is removed from the plant exhaust gases primarily by electrostatic precipitators or baghouses and secondarily by scrubber systems. 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.
Fly ash significantly improves concrete performance in different ways and also provides many benefits in cement and non-cement applications. Fly Ash colour can vary from grey and dark grey, yellowish tan and light to brownish.
ADVANTAGES OF FLY ASH IN CONCRETE
Fly Ash is a Pozzolan
Improves concrete workability and lowers water demand
Sulfate and Alkali Aggregate Resistancet
Rise in compressive strength over time
Environment friendly
CEMENTATION Fly Ash is optimized for its fineness while reducing the water demand and improving the chemical compositions to maximise its benefits when used in concrete. Fly-ash can also be used as an add-on to concrete mixture with pozzolanic and/or latent hydraulic properties.
We at CEMENTATION selectively collect fly ash and subject to rigorous testing, further refines these collected materials to produce quality fly ash products meeting the needs of our customers.
Fly ash, also known as flue-ash is a residue which is generated during combustion and consists of fine particles. There are impurities in coal which mostly consist of clays, limestone and dolomite particles. These turn up into ash as they cannot be completely burned.
Fly ash is useful in a number of ways and is one of the most researched upon mineral source. It is mainly a pozzolanic substance which contains aluminum and silicon material which in return due to the presence of water can take form of cement.
A lot of research and development initiative have been taken place across the globe to build and develop technologies that can utilize the full potential of fly ash. Royal Mineral takes care to ensure flawless production stages.
