Geopolymer Concrete

Geopolymer concrete is made by waste materials such as fly ash or slag from iron and metal production are used, which helps lead to a cleaner environment. The use of this concrete helps to reduce the wastes and also reduces carbon emission by reducing Portland cement demand.

Composition of Geopolymer Concrete

Ø  Fly ash

Ø  GGBS

Ø  Fine aggregates and

Ø  Coarse aggregates

Ø  Catalytic liquid system (CLS): It is an alkaline activator solution (AAS) for GPCC.  It is a combination of solutions of alkali silicates and hydroxides, besides distilled water.

Application ofGeopolymer Concrete

Ø  Construction of Pavement

Ø  Retaining walls

Ø  Water tanks

Ø  Precast Bridge deck

Properties of Geopolymer Concrete

Mechanical property of Geopolymer Concrete

Ø  Geopolymer concrete will get its strength faster than Ordinary Portland cement concrete. Compressive strength of Geopolymer Concrete have been found up to 70 MPa.

 Other Properties of Geopolymer Concrete

Ø  Heat of hydration is low compared to other cement concrete.

Ø  It has very low permeability thus corrosion of reinforcement steels can be avoided compared to other cement concrete.

Ø  Drying shrinkage is much less compared to other cement concrete therefore thick and heavily restrained concrete structures can be made.

Ø  This concrete has found very high acid resistance under exposure of 2-10% of sulphuric acids.

Ø  It has good fire resistance compared to OPC based concrete.         

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