Fly ash is a fine, powdery by product of burning pulverized coal in power plants. It consists mainly of silica (SiO₂), alumina (Al₂O₃), and calcium oxide (CaO) and is collected from flue gases using electrostatic precipitators or bag filters. It is widely used in construction due to its pozzolanic properties, meaning it reacts with lime and water to form cementitious compounds.
CHEMICAL PARAMETERS
RESULT*
UNIT
Total Sulphur as Sulphur trioxide (SO3)
0.13
%
Available alkalis as sodium oxide (Na2O)
1.21
%
Silicon Dioxide as SiO2
63.72
%
SiO2+AJ2O3+Fe2IO3
91.75
%
Reactive Silica
>35
%
Magnasium Oxide (Mgo)
1.98
%
Total Chlorides
0.0045
%
Properties & Benefits of Fly Ash:
✔ Pozzolanic Activity: Enhances the strength and durability of concrete.
✔ Reduces Water Demand: Improves concrete workability and reduces shrinkage.
✔ Environmental Benefit: Recycles industrial waste, reducing landfill disposal.
✔ Increases Resistance to Sulfate Attack: Enhances concrete durability in harsh environments.
Applications of Fly Ash:
• Concrete & Cement Production – Used as a partial cement replacement to improve durability.
• Brick & Block Manufacturing – Used in fly ash bricks to replace traditional clay bricks.
• Road Construction – Mixed with lime or cement for soil stabilization.
• Geopolymer Production – Helps create eco-friendly binders as a substitute for Portland cement., mortar, and construction materials. Filtration, and even cosmetics.
Prayosha Tredlink LLP
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