Geopolymers are new materials for fire- and heat-resistant coatings and adhesives, medicinal applications, high-temperature ceramics, new binders for fire-resistant fiber composites, toxic and radioactive waste encapsulation and new cements for concrete.

1. “GEOPOLYMER CONCRETE”
A NEW VISION TO THE WORLD
OF CONSTRUCTION .
Prepared by
Shaswat Kumar Das

2. TABLE OF CONTENTS:
1. Introduction:Why to replace OPC ?
2. Why Geopolymer?
3. Geo-polymer concrete
4. OPC Vs.Geo-polymer
5. Preparation
6. Conclusions

3. INTRODUCTION: WHY TO REPLACE
OPC?
 The Portland cement production contributes 7 % of total CO2 gas
emission ,a major cause of global worming.
 Production of Portland cement requires massively huge quantity of
CaCO3.
 A huge amount of water is used in making concrete mixes.

4. Why GEOPOLYMER?
 To reduce the co2 emission by totally replacing the cement.
 To produce concrete with very negligible water.
 To use the industrial by-product for a beneficial purpose , e.g. –
fly-ash , RHA , GGBS , kaolinite , clay etc.
 To conserve the hundreds of thousands of acres currently used for
disposal of coal combustion products.
 To provide a new , durable and eco-friendly engineering construction
material.

5. GEO-POLYMER CONCRETE
 It is the concrete without cement and very negligible water .
 The basic component of this concrete are :-
1.Source materials :
alumina-silicate (pozolanic materials) (fly ash,GGBS,kaolinite, RHA etc.)
2.Alkaline liquids :
combination of sodium hydroxide (NaOH) or potassium hydroxide
(KOH)and sodium silicate or potassium silicate.
 The alkali solutions are reacts with the pozolanic materials , its may be
from geological or industrial origin and make polymerization reaction to
form a matrix so the concrete called as geo-polymer concrete.

6. OPC VS. GEO POLYMER
 Greater corrosion resistance.
 Substantially higher fire resistance(upto 1316 degree Celsius)
 High compressive and tensile strengths.

7.  Rapid strength gain and lower shrinkage & segregation
 Greenhouse gas reduction potential as much as 90%when compared
with OPC.
 Higher sulphate resistance.

8. PREPARATION
Aggregate + Fly ash +
Alkaline
activator(NaOH+Na
Silicate)
Geopolymeriztion
Geopolymer
concrete

9. Queensland University,GCI
building,Austraila using
geopolymer concrete

10. PYRAMIDS OF EGYPT USING CONCEPT
OF GEOPOLYMER CONCRETE

11. CONCLUSIONS
The reduced CO2 emission of Geopolymer makes it a
good alternative to Ordinary Portland Cement.
Produces a substance that is comparable to or better than
traditional cements with respect to most properties.
Geo polymer 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.

12. AS AN ENGINEER, I REQUEST ALL OF YOU TO USE ECO-FRIENDLY
MATERIALS AND HELP CREATING A BETTER ENVIRONMENT.