Green Building Bricks Made with Clays and Sugar Cane ... Building Bricks.pdf · fired bricks, in...
Transcript of Green Building Bricks Made with Clays and Sugar Cane ... Building Bricks.pdf · fired bricks, in...
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Green Building Bricks Made with
Clays and Sugar Cane Bagasse
Ash
Danupon Tonnayopas
Department of Mining and Materials Engineering
Faculty of Engineering Prince of Songkla University
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Performances characteristics on the use of some
secondary materials and waste types, as partial
replacement for primary clayey soil in the manufacture of
fired bricks, in order to reduce the energy and firing cost
of the clay brick production process was conducted for a
long period by Rahman [1], Tonnayopas and Na-
Phattalung [2], Tonnayopas and Ponsa [3], Tonnayopas
et al. [4,5,6,7,8], Kooptarnond and Tonnayopas [8], Weng
et al. [9], and Lingling et al. [10]. Sugar cane bagasse
ash (SCBA) is generated as a combustion by-product
from process of sugar, alcohol and electricity factories.
Composed mainly of active silica, due to this by-product
often be used as a pozzollanic material in mortar and
concrete. Several studies have shown that the use of S
Introduction
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Keeping on actual manufacturing
costs, by incorporating SCBA as
the raw material without to
degrade their properties of brick
based upon the Thai Industrial
Standard (TIS)
To enhance the physico-
mechanical properties and phase
composition of local clay-bricks
for construction purposes
2
1
Aim of Study
Asean++ 2013
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CS
200 mesh OMC mixed SCBA 0,% 10%, 20%, 30%, 40% and 50%
Test & Analysis
Hydraulic pressure 100 bars
Heat 100oC 1 -d and fired 1050oC
Linear shringkage Weight loss Bulk density Water absorption Electrical resistance Crushing strength
XRF
Experimental Procedure
Chemical resistance XRD
SEM
XRD DTA SEM
SCBA
Conclusion
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Mixture Items Raw materials (wt.%) OMC
(%) CS SCBA
CS or SCBA0 100 0 20.81
SCBA10 90 10 21.21
SCBA20 80 20 21.98
SCBA30 70 30 21.23
SCBA40 60 40 22.15
SCBA50 50 50 21.30
Elaborated raw materials mixtures and
moisture
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Chemical composition of materials (in mass)
Chemical composition CS (%) SCBA (%)
SiO2 58.11 38.31
Al2O3 17.88 2.84
CaO 0.13 10.76
Fe2O3 8.58 3.36
K2O 5.98 1.77
TiO2 1.86 0.21
MgO 1.22 0.94
P2O5 - 0.90
SO3 - 0.45
MnO2 0.30 0.23
LOI 0.28 40.21
Surface area, m2/g - 2.214
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XRD pattern of raw
materials
SCBA
CS
Q- Quartz
C-Calcite
Mi-Microcline
Q- Quartz
K-Kaolinite
Mu-Muscovite
L-Leucite
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DTA pattern
SCBA
CS
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SEM photomicrograph
SCBA
CS
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Milling
and
Sieving
Drying
and
Mixing
Pressing Sintering Raw
materials
1050C Ball mill
curing 24 h
Mixing
OMC and
Hydraulic
pressure
at 100
bars
100C
200 mesh
SiO2-rich waste
Preparation a of brick specimens
“SiO2+CaO
”
curing
24 h
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8
10
12
14
16
18
20
0 10 20 30 40 50
Sugar Cane Bagasse Ash Content (%)
Wat
er A
bso
rpti
on
(%
)
0
2
4
6
8
10
12
14
16
18
0 10 20 30 40 50
Sugar Cane Bagasse Ash Content (%)
Wei
gh
t L
oss
(%
)
Variation of water
absorption of
SCBA bricks
Variation of
weight loss of
SCBA bricks
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0.0
1.0
2.0
3.0
4.0
5.0
6.0
0 10 20 30 40 50
Sugar Cane Bagasse Ash Content (%)
Lin
ear
Sh
rin
kag
e (%
)
1000
1200
1400
1600
1800
2000
2200
0 10 20 30 40 50
Sugar Cane Bagasse Ash Content (%)
Bu
lk D
ensi
ty (
kg
/m3)
Variation of
bulk density of
SCBA bricks
Variation of linear
shrinkage of
SCBA bricks
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0
500
1000
1500
2000
2500
0 10 20 30 40 50
Sugar Cane Bagasse Ash Content (%)
Ele
ctri
cal
Res
ista
nce
(M
egaO
hm
-cm
)
Variation of
cold crushing
strength of
SCBA bricks 18
23
28
33
38
43
0 10 20 30 40 50
Sugar Cane Bagasse Ash Content (%)
Co
ld C
rush
ing
Str
eng
th (
MP
a)
Variation of
electrical
resistance of
SCBA bricks
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Q- Quartz
A-Albite
H-Hematite
L-Leucite
X-ray diffraction patterns of brick
SCBA30
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SEM
photomicrographs of
the fracture surface
of specimen SCBA30
sintered at 1,050C
SCBA residue with CS
matrics
varied irregular pores
in texture
SCBA
CS
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Regarding to the advantages of less firing shrinkage, less
weight loss and greater compressive strength of SCBA–
CS brick should stimulate the use of SCBA as a brick
additive in the green material. It indicates that SCBA has
potential as a material for brick components.
Based on the point of view, the energy-saving and
maximum use of ash, it is apparent that mixture with 30%
SCBA fired at 1,050C was optimal for meeting the brick
quality of Thai Industrial Standard.
The fired bodies after hydraulic hardening at a dried
environment possess the highest values of mechanical
strength. The resulting products have specific structure
mainly composed of carbons and new formations of FeO,
potassium and sodium silicates and aluminates as one
crystals or amorphous phases. The new structure of
CS/SCBA ceramics possess semihydraulic properties.
Conclusion
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Thank you for your attention