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
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
Greater corrosion resistance,
Substantially higher fire resistance (up to
High compressive and tensile strengths
Rapid strength gain, and lower
Greenhouse gas reduction potential as
much as 90 percent when compared with
6. Hardened cementations paste made from flyash and
Combines waste products into useful product.
Setting mechanism depends on polymerization.
Curing temp is between 60-90 degree.
7. Source materials :
combination of sodium hydroxide (NaOH) or
potassium hydroxide (KOH) and sodium silicate or
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.
14. . Pan Mixer Used in the Manufacture of Geopolymer
19. Cutting the world’s carbon.
The price of fly ash is low.
Better compressive strength.
Excellent properties within both acid and salt
20. Pre-cast concrete products like railway sleepers,
electric power poles, parking tiles etc.
Marine structures due to resistance against chemical
Waste containments( fly ash)
FUTURE use IN MAJOR PROJECTS
23. • Different source materials
• Properties of soluble silicate
• Industry regulations
• New material
• Lack of awareness.
24. 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
28. Non toxic, bleed free
Sets at room temperature
Long working life before stiffening
Higher resistance to heat and resist all inorganic
Higher compressive strength
29. 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
Almost no corrosion products could be found on the
surface of the geopolymer
34. 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.