Fly ash
• Ash Precipitated Electrostatically from the Exhaust Fumes of Coal Fired Power Stations.
• Fly Ash is a Cement Extender & Enhancer, used as Partial Replacement for OPC.
• Fly Ash is a Pozzolan, Which Reacts with Water & Lime to Form Cementitious Material.
• Fly Ash is a Siliceous or Siliceous & Aluminous.
• Material, with Chemical Composition, Sio2 (47 – 55 %) & Al 2o 3(25 – 35%).
Types of Fly ash
Class C
• Fly ash normally manufactured by burning lignite or sub-bituminous coal is classified as Class ‘C’ fly ash.
• It comes with pozzolanic and cementation properties.
• It is usually made by burning lignite or sub-bituminous coal usually contains more than 20% lime.
• The content of alkali and sulfate (SO4) is generally higher in Class C fly ash.
Class F
• Fly ash generally produced by burning anthracite or bituminous coal is classified as class ‘F’ fly ash.
• Commonly produced fly ash by burning anthracite or bituminous coal usually has less than 5% lime.
• This fly ash is pozzolanic in nature and contains less than 20% lime (CaO).
Fly ash Practical Application
For Applications of Durable Concrete, High Performance Concrete, Grouts, Self - Compacting Concrete & Spray Concrete.
Technical Benefits of using Fly Ash
Lower Heat of Hydration in Large Pours & Min Water Amount. High Sulphate Resistance. Design Strengths are Readily Achieved & Long-Term Strengths are Improved. Reduces Shrinkage & Creep of Concrete. Alkali - Aggregate Reaction is Prevented. Increased Resistance Against Chlorides. Reduces Permeability & Porosity Producing Very Dense Concrete. Increases Durability, Workability & Pump Ability of Concrete.
Packing
Packed in Jumbo Bags each of 1000 – 1500 kg. Bulk in Silo Trucks.