Parames Kamhangrittirong - Construction material ... · Parames Kamhangrittirong - Construction...
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Parames Kamhangrittirong Center of Building Innovation and Technology
Building Technology Division Faculty of Architecture
Kasetsart University, THAILAND
Construction material development using fly ash based geopolymer
Construction material development using fly ash based geopolymer
Outline
Introduction
Experimental program
Results and discussion
Conclusions
Background Introduction
Lampang Province -Mae Moh
3,500,000 tons/year
Background
Construction materials
Geopolymer
WASTE
Introduction
Sustainable Development
Geopoly- merization
Materials
Oxide-mole ratios of reactant mixture
Molar ratio Value (Davidovits : 1982)
Na2O / SiO2
0.20-0.48
SiO2 / Al2O3
3.50-4.50
H2O / Na2O
10.0-25.0
Na2O / Al2O3
0.80-1.60
Materials
§ Fly ash produced by Mae Moh plant, § Sodium hydroxide (10M) § Sodium silicate solution (SiO2:Na2O = 3:1)
Component SiO2 Al2O3 CaO Fe2O3 Composition
(mass %) 32-38 20-24 16-19 14-16
Objectives
Introduction
1
Effect of alkali solution ratio (WR = 1.0-2.5)
3
Microstructure SEM / EDS Analysis
2
Compressive Strength
Weight Ratio of Na2SiO3 : NaOH < 0.50
Weight Ratio of Na2SiO3 : NaOH > 3.00
Experimental program
Mixture
0
100
200
300
400
500
600
700
Mix1 Mix2 Mix3 Mix4
FA Na2SiO3 NaOH + Sand 2000 (gm.)
5 cm.
10 c
m.
The geopolymer mortar was poured into mould and stored in the ambient temperature
Testing method
Compression test
Testing method Experimental
program
Compressive strength
At the ages of 1, 2, 4, 7, 28 and 90 days, specimens were taken from the storage room and tested for compressive strength.
Testing method Experimental
program
SEM/EDS
The small pieces of tested specimens were examined using scanning electron microscope (SEM)/energy dispersive X-ray (EDX) to determine the composition of products.
Results & discussion
Compressive strength
0
5
10
15
20
25
0 10 20 30 40 50 60 70 80 90Age (Days)
Com
pres
sine
stre
ngth
(MPa
)...
Mix-1
Mix-2
Mix-3
Mix-4
24.4
20.1
0
5
10
15
20
25
1.00 1.50 2.00 2.50
Com
pres
sine
stre
ngth
(MPa
)... 90 d.
28 d.
7 d.
4 d.
2 d.
1 d.
Na2SiO3/NaOH
Results & discussion Effect of alkali solution ratio
24.4 20.1
SEM/EDS Results &
discussion
(a) Fly ash [5000X] (a) (b) Mix-1 [5000X]
(c) Mix-4 [5000X]
SEM/EDS Results &
discussion
Si/Al atomic ratio
2.64 - 2.85
Mix #4
Mix #4
Conclusions
Alkali solution
Fly ash from Mae Moh Plant
+
Geopolymer product
NaOH content
Compressive strength
Na2SiO3 content
Conclusions
The microstructure of fly ash based geopolymer revealed a homogeneous structure.
Microstructure
Conclusions
Geopolymer mortar and OPC mortar immersed in sulfuric acid 5% after 120 days
OPC 8M Geopolymer
12M Geopolymer 10M Geopolymer
Applications
Development
Research
Raw materials
Conclusions
Thank you for your attention
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