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.
Fly ash is a by-product of coal burning at the utility plants. As coal is burned, non-combustible mineral impurities in coal evaporate andcondense into tiny particles of glass, almost totally spherical inshape. The individual particles are very small, like talcum powderand are carried up and out of the boiler in the flow of exhaust gasesleaving the boiler after the coal is consumed.
The fly ash particlesare removed from the exhaust stream in bag houses or electrostatic precipitators and then stored for later shipment
The difference between fly ash and Portland cement becomes apparentunder a microscope. Fly ash particles are almost totally spherical inshape allowing them to flow and blend freely in mixture. Thatcapability is one of the properties making fly ash adesirable admixture of concrete.
Fly Ash is a fine, powdery byproduct produced form burning pulverized coal in thermal power plants for producing electricity. It primarily consists of silica, alumina and iron oxide. Due to its pozzolanic properties. Fly ash is widely used in making concrete, blocks, bricks, and road base materials. It enhances workability, durability, and reduce water consumption. Using fly ash helps in waste management and reduces pollution.
Applications
Fly Ash used as a Pozzolana in Cement, Cement Mortar and Concrete and as an admixture in Mortar and Concrete/ as a part of cement replacement.
1) Cement Production
2) Ready Mix Concrete
3) Self- Compacting Concrete
4) Mass Concrete
5) Roller Compacted Concrete
6) Lightweight Concrete
Coal Fly Ash
CFA could be used in huge quantities in two areas: ash dyke construction and low-lying region filling [26,27,28]. In several affluent countries, CFA has been utilized successfully as a structural filler.
Fly Ash is by product generated during combustion of coal, and comprises the fine particles that rise with the flue gases. Ash which is collected from the bottom is termed bottom ash. Fly ash is collected by electrostatic precipitators or other particle filtration equipment before the flue gases reach the chimneys of coal-fired power plants and together with bottom ash removed from the bottom of the furnace is in this case jointly known as coal ash. Depending upon the type of coal being used, the specification of Fly Ash varies considerably, but Fly Ash contains substantial amounts of silicon dioxide and calcium oxide (CaO), both being endemic ingredients in many coal-bearing rock strata. We are a reputed Fly Ash Exporter based in India and are supplying Fly Ash different cement, ready mix concrete, steel, refractories and construction industries.
The Major Utilization Areas Of Fly Ash :
- Manufacture of Portland Pozzolanic Cement & Performance improver in Ordinary Portland cement (OPC).
- Part replacement of OPC in cement concrete.
- High volume Fly Ash concrete.
- Roller Compacted Concrete used for dam & pavement construction.
- Manufacture of ash bricks and other building products.
- Construction of road embankments, structural fills, low lying area development.
- As a soil amender in agriculture and wasteland development.
Types of Fly Ash:
- According to the type of coal used fly is classified into two types. Anthracite and bituminous coal produces Fly Ash classified as class F. Class C Fly Ash is produced by burning lignite or sub-bituminous coal. Class C Fly Ash has self-cementing properties.
- Class F and Class C Fly Ash are products of the combustion of coal in large power plants. Fly Ash is collected in electrostatic precipitators or baghouses, and then transferred to large silos for shipment. When needed, Fly Ash is classified by precise particle size requirements, thus assuring a uniform, quality product.
- Class F Fly Ash is available in the largest quantities. Class F is generally low in lime, usually under 15 percent, and contains a greater combination of silica, alumina and iron (greater than 70 percent) than Class C Fly Ash.
- Class C Fly Ash normally comes from coals which may produce an ash with higher lime content generally more than 15 percent often as high as 30 percent. Elevated CaO may give Class C unique self-hardening characteristics.
Fly ash is one of the naturally-occurring products from the coal combustion process and is a material that is nearly the same as volcanic ash. Volcanic ash concrete was used thousands of years ago to produce Roman concrete structures that exist and function today; e.g., the Pantheon, Coliseum, and ancient aqueducts. When coal is burned in today’s modern electric generating plants, combustion temperatures reach approximately 2800°F. The non-combustible minerals that naturally occur from burning coal form bottom ash and fly ash. Bottom ash is a light-weight aggregate material that falls to the boiler bottom for collection. Fly ash is the material that is carried off with the flue gases, where it is collected and can be stored in silos for testing and beneficial use classification.
The reuse of fly ash as an engineering material primarily due to its pozzolanic nature, spherical shape, and relative uniformity. Fly ash recycling, in descending frequency, includes usage in Portland cement & grout, as a structural fill, waste stabilization, and raw feed for cement clinkers, mine reclamation, stabilization of soft soils, road sub base, aggregate and flow able fill.
Fly ash is a finely divided residue made from the combustion of pulverized coal that can be used to increase concrete durability and workability, while reducing permeability.
As fly ash contains aluminous and siliceous components, it may form cement when mixed with water if the calcium content of the fly ash is high enough. Similarly, mixing fly ash with lime and water can create a substance similar to Portland cement.
Fly ash can be separated into two main types, known as:
Class F
Class F fly ash contains particles covered in a type of melted glass allowing it to reduce the risk of concrete expansion and increase resistance to sulfates and alkali-aggregate reactions.
Class C
Class C fly ash contains a higher percentage of calcium oxide, making it more effective in strengthening structural concrete.
Applications & Benefits of Fly Ash:
Fly ash is used in commercial and industrial sectors for improving the durability and workability of concrete mixes.
Fly ash is also used as filler in paints, adhesives, and metal and plastic composites.
It's commonly used as structural fill for road construction and fly ash can be used to make bricks, ceramic tiles, plaster, Portland cement, and ready-mix cement.
We are the largest suppliers of fly ash from pakistan,
Fly ash pozzolanic glassy siliceous and aluminous supplementary cementitious material.
Fly ash can be used as a replacement of ordinary portland cement, due to its super fine blame and pozzolanic quality it gives more psi strength durability in concrete than traditional concrete.
Manufacturers of concrete, ready-mix tuff tiles, paver blocks, cement, bridges, soil stabilization, pavement, and building materials can utilize fly ash as a prime material to reduce cost, increase strength and quality of their products very low price material.
Fly ash is one of the residues generated in combustion, and comprises the fine particles that rise with the flue gases. Ash which does not rise is termed bottom ash. In an industrial context, fly ash usually refers to ash produced during combustion of coal. Fly ash is generally captured by electrostatic precipitators or other particle filtration equipments before the flue gases reach the chimneys of coal-fired power plants, and together with bottom ash removed from the bottom of the furnace is in this case jointly known as coal ash. Depending upon the source and makeup of the coal being burned, the components of fly ash vary considerably, but all fly ash includes substantial amounts of silicon dioxide (SiO2) (both amorphous and crystalline), being endemic ingredients in many coal-bearing rock strata.
Advantages to Fly ash
Greater long term strength
Improve Workability
Excellent Thermal Insulation
Reduce Permeability
Low heat of hydration
Increased sulphate resistance
Increased corrosion resistance
Reduced Alkali - Aggregate Reaction
Fly ash is very good resource material. It can advantageously used in cement and concrete works as well as fill applications. Flyash is transported to fly ash storage silo. Fly ash is loaded in close tankers and transported to RMC plants. Fly ash is also available in bags.
Portland cement when mixed with water produce cementitious material in this process free lime is also liberated. This free lime cause of porosity in concrete, however if fly ash available in the mix, free lime will reacts with fly ash to produce additional cementitious materials which produce additional strength and make the concrete denser, thus increase its durability, the present of fly ash also helps reducing heat of hydration.
a. Name of product. Fly Ash
b. Price of the product. To be discussed with suppliers
c. Product origin - India
d. Key Specifications/Special Features
e. Harmonization System (HS) Code : 26219000
f. Minimum Order Size : 28000 KGS
g. Packaging details. Jumbo Bag, Weight. 1400 Kgs
Fly ash is a fine gray powder consisting mostly of spherical, glassy particles that are produced as a byproduct in coal-fired power stations. Fly ash has pozzolanic properties, meaning that it reacts with lime to form cementitious compounds. It is commonly known as a supplementary cementitious material.
Fly ash is suitable for a wide variety of applications and uses, including:
â?¢ Concrete
â?¢ Dams
â?¢ Flowable fill
â?¢ Mines
â?¢ Landfills
â?¢ Geopolymer concrete
Fly ash is also known as flue-ash or simply ash.
Fly ash significantly improves concrete performance and also provides many benefits in cement and non-cement applications. Also, when treated with sodium hydroxide, fly ash appears to function well as a catalyst for converting polyethylene into a substance similar to crude oil in a high-temperature process called pyrolysis.
Fly ash is a finely divided residue made from the combustion of pulverized coal that can be used to increase concrete durability and workability, while reducing permeability.
Product Description :
Fly ash is a fine powder that is a byproduct of burning pulverized coal in electric generation power plants. Fly ash, being primarily pozzolanic, can actually replace a percentage of the Portland cement, to produce an even stronger, more durable and more environment friendly concrete.
The initial compressive strength is low but as days pass, flyash concrete gains more strength and eventually
has a lot more strenght as compared to normal Portland cement.Significantly reduce the release of CO2 in
atmosphere.Can be used for construction of structure above/under water
Product: Fly Ash (ASTM C618 CLASS F)
Price Of Prodiuct :
USD 36--USD 55 PER MT
Product Origin :
INDIA
Key Specifications/Special Features
Grade Standard : ASTM618/ BS 3892
Physical State : Powder
Colour : light Grey , Grey
Usage : Industrial
Lead Time : 10-12 Days , Negotiable
Minimum Order Size and Packgaing details :
MOQ- One 20 ft conatiner
Packing: 1.4 Mt Jumbo Bags with Inner Liner,
As per client requirement
