GEOPOLYMER CONCRETE

2.  Partially replace the cement in concrete
Ex: HIGH VOLUME FLY ASH CONCRETE
 Develop alternative material
Ex: Geopolymer concrete

3.  Portland cement production is a major contributor to
CO2 emissions as an estimated 5 TO 8 %of all human-
generated atmospheric CO2 worldwide comes from
the concrete industry.
 Production of Portland cement is currently topping 2.6
billion tons per year worldwide and growing at 5
percent annually.

4.  Geopolymer concrete has the potential to substantially
curb CO2 emissions
 produce a more durable infrastructure capable of
design life measured in hundreds of years
 conserve hundreds of thousands of acres currently
used for disposal of coal combustion products
 protect aquifers and surface bodies of fresh water via
the elimination of fly ash disposal sites.

5. OPC vs GEO POLYMER
Geopolymer concrete (GPC) using “fly
ash”
Greater corrosion resistance,
Substantially higher fire resistance (up to
2400° F),
High compressive and tensile strengths
Rapid strength gain, and lower
shrinkage.
Greenhouse gas reduction potential as
much as 90 percent when compared with
OPC.

6.  Hardened cementations paste made from fly ash and
alkaline solution.
 Combines waste products into useful product.
 Setting mechanism depends on polymerization.
 Curing temp is between 60-90 degree.

7.  Source materials :
Alumina-silicate
 Alkaline liquids
combination of sodium hydroxide (NaOH) or
potassium hydroxide (KOH) and sodium silicate or
potassium silicate.

9. Geopolymerisation
Storage
Aggregate
Fly ash
Alkaline activator
NaOH + Na Silicate

10.  Alkaline solutions induce the Si and Al atoms in the
source materials ,example fly ash , to dissolve.
 Gel formation is assisted by applying heat.
 Gel binds the aggregates ,and the unreacted source
material to form the Geopolymer concrete.

13. . Pan Mixer Used in the Manufacture of Geopolymer
Concrete

14. Addition of Liquid Component

15. Fresh Geopolymer Concrete Ready for Placing

16. Slump Measurement of Fresh Geopolymer Concrete

18.  Cutting the world’s carbon.
 The price of fly ash is low.
 Better compressive strength.
 Fire proof
 Low permeability.
 Eco-friendly.
 Excellent properties within both acid and salt
environments.

19.  Pre-cast concrete products like railway sleepers,
electric power poles, parking tiles etc.
 Marine structures due to resistance against chemical
attacks
 Waste containments( fly ash)
 FUTURE use IN MAJOR PROJECTS

20. IN FUTURE

21. IN FUTURE

22. • Different source materials
• Properties of soluble silicate
• Contaminants
• Industry regulations
• New material
• Lack of awareness.

23. The compressive strength of GEOPOLYMER concrete is
about 1.5 times more than that of the compressive
strength with the ordinary Portland cement concrete,
for the same mix.
 Similarly the Geopolymer Concrete showed good
workability as of the ordinary Portland Cement
Concrete.

27.  Non toxic, bleed free
 Sets at room temperature
 Long working life before stiffening
 Impermeable
 Higher resistance to heat and resist all inorganic
solvents
 Higher compressive strength

28.  The exposure of the geopolymers materials to the NaCl
solution resulted in the consistent increase in the
compressive strength during the whole period of
measurement (720 days) and the values were as high as
70 Mpa
 Almost no corrosion products could be found on the
surface of the geopolymer

29. A GEOPOLYMERS mortar after the 1.5-year exposure to the
solutions of NaCl

33. The reduced CO2 emissions of Geopolymer cements make them a
good alternative to Ordinary Portland Cement.
Produces a substance that is comparable to or better than
traditional cements with respect to most properties.
Geopolymer concrete has excellent properties within both acid
and salt environments
Low-calcium fly ash-based geopolymer concrete has excellent
compressive strength and is suitable for Structural applications.