1. CONTENTS
• Abstract
• Introduction
• Objective
• methodology
• Literature review
• Study of materials
• Concrete mix design
• Testing of materials
• Curing of harden concrete
• Results and discussion
• Conclusion
• Reference
2. ABSTRACT
• In this project, we will be done a sample of fly ash-
based geo polymer concrete.
• This is manufactured from predominantly silica and
alumina containing source materials.
• Fly ash is to replace the use of ordinary Portland
cement in concrete.
• To measure stress-strain of geo polymer concrete in
compression of Portland cement concrete.
3. INTRODUCTION
• The development of fly ash-based geo polymer concrete
is in response for the need of a “greener” concrete in
order to reduce the carbon dioxide emission from the
cement production.
• Geo polymer concrete is manufactured from
predominantly silica and alumina containing source
material.
• As these important material characteristics of concrete,
especially in design of structural concrete members, study
on this matter need to be carried out.
4. OBJECTIVES
• In our project cement is fully replaced by fly ash – class F. by using
fly ash the concrete is prepared in accordance with IS specifications
of grade M25.
• The AAS solution is prepared with mixing of sodium hydroxide and
sodium silicate solutions with the ratio of 2.5 to the fly ash to solids
ratio.
• Then the cube and cylinder specimens are prepared to check the
harden characteristics of geo polymer concrete.
• For the curing purposes the concrete is placed under hot air oven at
1600c. Then the tests to be performed. The tests have been done are
compressive strength, split tensile strength and modulus of elasticity
and test results have been verified.
5. METHODOLOGY
•
• JOURNAL
• COLLECTION
• STUDY OFJOURNAL
• MATERIAL
• COLLECTION
• PROPERTIES OF MATERIALS
• MIX DESIGN
• CASTING OFCUBES AND
• BEAMS
• CURING
• TESTING OFCUBES AND
• BEAMS
• RESULTS AND CONCLUSION
6. LITERATURE REVIEW
• Compressive strength of GPC increases over controlled concrete
by 1.5 times (M-25 achieves M-45). Split Tensile Strength of
GPC increases over controlled concrete by 1.45 times. Flexural
Strength of GPC increases over controlled concrete by 1.6 times.
In Pull Out test, GPC increases over controlled concrete by 1.5
times. In Durability test, there is decrease in weight loss by 10
times (At 56 days % loss in weight has reduced from 5.66% to
0.60%).
• The water permeability test revealed that the concrete had
“Average” quality, judging by coefficient permeability in the
range 2.46 x 10 -11 to 4.67 x 10 -11 m/s. The void content
measured from the test showed similar “average” criteria, varying
from 8.2% to 13%.It can be inferred that the water/solids ratio is
the most influential parameter to increase strength, and to
decrease the water absorption/AVPV and water permeability.
7. STUDY OF MATERIALS
• Course aggregates
• Fine aggregate
• Fly ash
• Sodium hydroxide
• Sodium silicate
• Alkaline liquid
13. MIX RATIO FOR CUBE
• MAXIMUM WATER CONTENT 0.70 (l)
• FOR M25 CONCRETE CUBE M25(1:1.36:2.2)
CUBES
WEIGHT OF THE CONCRETE CUBE =9.5(kg)
FLY-ASH =5(kg)
FINE AGGREGATE =5 (kg)
COURSE AGGREGATE =10 (kg)
15. MIX RATIO FOR CYLINDER
• MAXIMUM WATER CONTENT 1.40 (l)
• FOR M25 CONCRETE CYLINDER M25(1:1.36:2.2)
CYLINDER
WEIGHT OF THE CYLINDER =14 (kg)
FLY-ASH =9 (kg)
COURSE AGGREGATE =18 (kg)
FINE AGGREGATE =9 (kg)
16. TESTING OF MATERIALS
• Sieve analysis
• Specific gravity or river sand
• Coarse aggregate
• Specific gravity of coarse aggregate
• Sieve analysis of coarse aggregate
• Specific gravity test for coarse aggregate
• Specific gravity test for fly ash
18. CURING FOR HARDEN
CONCRETE
• Heat-curing of low-calcium fly ash-based
geopolymer concrete is generally recommended.
• Heat-curing substantially assists the chemical
reaction that occurs in the geopolymer paste.
• Both curing time and curing temperature
influence the compressive strength of
geopolymer concrete.
21. TESTS ON FRESH CONCRETE
S.no
Name of the
test
Observatio
n
Test Result Remarks
1 Slump Test Slump value 140 mm The test
results
shows that
the concrete
is workable
and easy to
flow
2
Compaction
Factor Test
Compaction
factor
0.89
3
Vee-Bee
Consistomet
er
Vee-bee
seconds
25 seconds
4 Flow Test Flow value 400 mm
22. TESTS ON HARDENED CONCRETE
S.No
Specimen
No
Compressive Strength in (N/mm2)
Conventio
nal
Concrete
Average
Geopolym
er
Concrete
Average
1
Specimen
1
22.44
25.48
20.89
26.07
2
Specimen
2
25.78 26.22
3 Specimen 3 30.22 31.11
24. SPLIT TENSILE STRENGTH RESULTS OF
CONCRETE (M25 GRADE)
S.No Specimen
Split Tensile Strength(N/mm2)
Conventio
nal
Concrete
Average
Geopolym
er
Concrete
Average
1
Specimen
1
2.12
2.64
2.4
3.01
2
Specimen
2
2.69 3.11
3
Specimen
3
3.11 3.53
25. GRAPHICAL COMPARISON OF SPLIT
TENSILE STRENGTH
2.64
3.01
0
1
2
3
4
CC GPC
Split
tensile
test
(N/mm²)
26. CONCLUSION
• Geopolymer concrete is an excellent alternative
solution to the CO2 producing Portland cement
concrete.
• Low-calcium fly ash-based geopolymer concrete has
excellent compressive strength within a day and is
suitable for structural applications.
• The price of fly ash-based geopolymer concrete is
estimated to be about 10 to 30% cheaper than that of
portland cement concrete.
