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DAYANANDA SAGAR COLLEGE OF ENGINEERING
An Autonomous Institution affiliated to Visvesvaraya Technological University, Belagavi, Shavige Malleswara Hills, Kumara swamy
layout Bangalore – 560078
DEPARTMENT OF CIVIL ENGINEERING
“EXPERIMENTAL STUDY ON STRENGTH ASPECT OF
RED MUD AND INCINERATOR WASTE BASED
GEOPOLYMER MORTAR”
Presented by:
PRIYANKA H J
IV SEM, MTech
1DS21CSE14
Under the Guidance of:
Dr. NEETHU URS
Professor
DSCE, Bangalore
FINAL VIVA - 2023
1
CONTENTS
• Abstract
• Introduction
• Literature review
• Objectives
• Methodology
• Basic material testing
• EDAX analysis of RM and IW
• Mix procedure
• Mix design
• Test results and comparison
• SEM and EDAX analysis of geopolymer mix
• Conclusion
• Scope for future work
• References
2
ABSTRACT
• The most important and widely used material in construction is concrete and its major component is cement, basically known as Ordinary
Portland cement (OPC). Since, OPC is well known for its high emission of CO2 gas.
• When looking for alternatives that need less energy or raw materials other than limestone will help minimize CO2 emissions from an
environmental standpoint. Geopolymers are promising alternative materials for Portland cement.
• Geopolymer are amorphous three-dimensional Alumina-Silicate binder material, which is produced by copolymerization of aluminosilicate
materials with alkaline solutions, exhibits higher mechanical strength and excellent durability properties.
• Several aluminosilicate industrial wastes such as fly ash, Metakaolin, red mud etc. can be used as source materials for geopolymer concrete
production. These wastes are used as source materials to produce geopolymer as it contains high silica and alumina content.
• In the present experimental study, Red Mud, incinerator waste and Micro silica as binder need to be added alkaline activator in the form of
sodium silicate (Na2SiO3) and sodium hydroxide (NaOH). Molarity variation of NaOH is taken as 6, 8, 10 M.
• Mortar proportion with 30% red mud and 60% incinerator waste exhibited maximum strength. Highest strength obtained for geopolymer
mortar was 2.36 MPa with 30% red mud and 60% incinerator waste and 10M molarity.
3
INTRODUCTION
• Concrete is the most predominantly used construction material. The basic ingredient of concrete is
cement, the mass production of cement increases carbon footprints and thus becomes a major
contributor for global warming.
• One promising option to lessen the environmental impact of conventional cement-based materials
is Geopolymers.
• Geopolymers are alumina-silicate bonds which are sustainable, inorganic materials used in
construction that can replace traditional cement and concrete, offering environmental friendly
alternatives with strong, durable properties.
• Since, cement contains alumina, silica and other elements. Here in this study, Incinerator waste
and Red mud that is produced by industries containing alumina and silica which goes as landfill is
used as an replacement for cement.
• Physical and chemical properties of red mud and incinerator waste are investigated.
Microstructural analysis are studied and a comparative explanation between strength parameters of
two the samples are presented.
4
LITERATURE REVIEW
TITLE YEAR PUBLISHER AUTHOR INFERENCE
Effect of Molarity on Compressive
Strength of
Geopolymer Mortar
2014 IJCER C.D. Budh
and N.R. Warhade
Tests was carried out on 70.6x70.6x70.6mm Geopolymer mortar specimen.
The ratio of alkaline liquid to fly ash is taken as 0.5. The obtained compressive
strength was validated by NDT results. Compressive strength increases with
increase in molarity. Also, velocity increases with increase in molarity.
Characterization of Red Mud as a
Subgrade Construction Material
2015 - Sarat Kumar Dasa ,
Subrat Kumar Routb ,
Shamshad Alam
Basic properties like specific gravity, particle size distribution, Atterberg’s
limits, OMC and MDD are determined. Engineering property like shear
strength are determined. The model footing test was performed to check
sustainability of red mud as pavement subgrade material. FE analysis was
performed and results were compared with the laboratory results.
Effect of curing methods of red mud
based geopolymer mortar
2017 IAEME Smita Singh, Dr. M. U.
Aswath, Dr. R.V.
Ranganath
Compressive strength, tensile strength and modulus of elasticity thermally
cured and ambient cured specimens were discussed. Strength of thermally
cured mortar improved with molarity whereas ambient cured mortar possessed
better strength at lower molarity. Tensile strength followed similar pattern as
compressive strength. Ambient cured mortars were found to be stiffer than the
thermally cured ones.
Effect of Alkaline Solution with Varying
Mix Proportion on Geopolymer Mortar
2017 IOP Ananthkumar M,
Raghavapriya S
Specimens of different NaOH solution (10M, 12M and 15M) for different mix
proportion (1:1, 1:2 and 1:3) and 60°C-80° C curing temperature were cast.
The densities, compressive strength, alkalinity, co-efficient of absorption were
determined.High curing temperatures produces higher strength. Mixes with
12M showed higher compressive strength than the rest proportions.
Effect of Mix Parameters on Strength of
Geopolymer Mortars
Experimental Study
2018 - A. Naghizadeh and S.O.
Ekolu
1.0- 3.0 (SS to SH) alkaline activator ratios were used with SS modulus= 2.5
and NaOH as 10-14M. Mortars of 2.25 A/B ratio were used to prepare 50 mm
cubes with L/S ratio from 0.3-0.6. All specimens showed significant influence
on compressive strength development. But, the optimum strength was at
SS/SH= 2.0 , 12M and L/S=0.5.
5
LITERATURE REVIEW
TITLE YEAR PUBLISHER AUTHOR INFERENCE
Preparation of red mud-based
geopolymer materials from
MSWI fly ash and red mud by
mechanical activation
2018 Elsevier Yuancheng Li, Xiaobo
Min, Yong Ke, Degang
Liu, Chongjian Tang,
Municipal solid waste incineration fly ash (MSWIFA) and red mud were utilized to
prepare red mud-based geopolymer materials (RGM). The hydration characteristics
long-term stability and physical properties of RGM were tested. Results showed
that mechanical activation can not only effectively activate red mud, but also
effectively improve the reaction of MSWIFA and red mud. When 14% sodium
silicate was added to the binder, the UCS reached 12.75 MPa at 28 days.
Performance of geopolymer
mortar cured under ambient
temperature
2019 Elsevier Mohamed G. Khalil,
Fareed Elgabbas ,
Mohamed S. El-Feky ,
Hany El-Shafie
The base material (GGBS and MK), water/binder ratio (0.0, and 15.0%), and
modulus of silicate (1.1, 1.3, 1.5, and 1.7) were considered. Fresh and hardened
properties were examined. It was observed that by increasing the modulus of
silicate, the workability increased and the compressive strength decreased. 1.7
modulus of silicate is the optimum mixture and compressive strength of the
optimum mixture after 7, 28 and 90 days of water curing were 19.6, 33.4 and 35.6
Mpa and its flowability was about 150%.
Fresh and Hardened Properties
of Fly Ash– Slag Blended
Geopolymer Paste and Mortar
2019 IJCSM Subhashree
Samantasinghr and
Suresh Prasad Singh
fresh and hardened properties of fly ash and slag blended mortar are investigated
and results are determined. Additionally, bonding and microstructural changes are
examined. The fresh properties of geopolymers were found within the prescribed
range of OPC. compressive strength of mortar specimens increases with an
increase of slag content in the mix
Compressive strength of mortar
with alkali activated fly ash and
GGBS
2020 IOP Sagarika panda,
Ramakantha panigrahi
Fly ash and GGBS as binder materials, specimens were prepared for compressive
strength check. Compressive strength achieved from temperature cured is higher
than ambient cured samples. GGBS content was directly proportional to the
compressive strength of mortar specimen.
Properties of red-mud-based
geopolymers in the light of
their
chemical composition
2024 IOP Ali Abdulhasan Khalaf,
Katalin Kopecskó
Statistical analysis has been performed on the major oxides of red mud to
understand the relationship between chemical composition and properties (e.g.,
workability, setting time, compressive strength, etc.) of red mud-based geopolymer
composite. With the results, it is concluded that red mud can be a suitable binder
by blending with other geopolymer source materials to achieve the desired fresh
and mechanical properties.
6
OBJECTIVES
• To find the optimum percentage of red mud & incinerator waste for preparation of geopolymer
mortar.
• To study the strength characteristics of red mud and incinerator waste based geopolymer mortar.
• To study the surface morphology of Geopolymer mix (red mud and incinerator waste mix) from
SEM analysis.
7
METHODOLOGY
8
LITERATURE
SURVEY
COLLECTION
OF
MATERIALS
BASIC
TESTING AND
CASTING OF
CM AND GM
SPECIMEN
STRENGTH
TESTING OF
CM AND GM
SPECIMEN
RESULT AND
ANALYSIS
CONCLUSION
BASED ON
OBSERVATION
METHODOLOGY- DESCRIPTION
 Exhaustive literature survey was carried out regarding various topics of project like geopolymer, incinerator wastes (fly ash, red mud), mix
design various standard testing methods etc.
 OPC 53 grade cement and sand were collected and utilized.
 Various tests on materials (Cement, fine aggregate, incinerator waste, red mud) was conducted.
 Based on test result of materials, cement mortar mix was done in accordance to IS 4031:1988.
 XRD Analysis/EDAX analysis was done for red mud and incinerator waste samples to find the aluminum and silica content in it.
 To prepare alkaline solution, NaOH pellets were made to dissolve in distilled water based on required molarity and then mixed with
required amount of sodium silicate solution 24 hours prior to the preparation of geopolymer mortar. (1M = 40gm of NaOH pellets)
 Preparing geopolymer mortar by varying percentage of red mud and incinerator waste and Mix proportion trial for product of mortar was
done.
 Based on mix design cubes were casted and strength tests was conducted on 7, 14, 28 days for the same. Based on the results, conclusions
are drawn control mix and these results will be compared with geopolymer mortar cube.
 SEM analysis was done post testing of geopolymer mortar cubes and Project report will be prepared in detail. 9
BASIC TESTING- CEMENT
Sl no. Tests conducted Results Requirements as per IS 12269-2013
1 Specific gravity 2.93 2.9-3.15
2 Normal consistency 28% ----
3 Initial setting time 35 min >30 min
4 final setting time 160 min 600 min
5 fineness 7.5% ----
10
Specific gravity Normal consistency Fineness Mould post NC test
BASIC TESTING- M SAND
Sl no. Tests conducted Results
1 Fineness modulus 3.14
2 Specific gravity 2.5
3 Bulking of sand 6%
4 Bulk density 1650 kg/m3
5 Water absorption 0.80%
11
Fineness modulus Specific gravity Bulking of sand Bulk density
Code book: IS 2386- 1963 part3
FINENESS MODULUS OF M SAND
Sl. No.
IS Sieve
Size
Weight
Retained
(gm)
Percentage
of weight
retained
Cumulative
percentage
retained
Percentage of
fine aggregate
passing
1 4.75 mm 38 3.8 3.8 96.2
2 2.36 mm 161 16.1 19.9 80.1
3 1.18 mm 235 23.5 43.4 56.6
4 600 187 18.7 62.1 37.9
5 300 245 24.5 86.6 13.4
6 150 120 12 98.6 1.4
7 pan 11 1.1 99.7 0.3
RESULTS
%gravel 3.8 D60 mm 1.3507234 Cu=D60/D10 5.245527784
% sand 98.6 D30 mm 0.50326531 Cc=D30*2/D60*D10 0.191883573
%fine 0.98 D10 mm 0.2575
D60 0.1 60 1.35072 0
1.3507234 60 1.35072 60
D30 0.1 30 0.50327 0
0.50326531 30 0.50327 30
D10 0.1 10 0.2575 0
Fineness modulus of fine aggregate= 314.4/100 = 3.144
12
Fine sand 2.2-2.6
Medium sand 2.6-2.9
Coarse sand 2.9-3.2
Code book: IS 383-1970
BULKING OF SAND
Bulking of sand =
𝐻2 −𝐻1
𝐻1
𝑥 100
Volume of sand taken= 300ml
% of water added each time = 2% =2% of 300 = 6ml
13
0
10
20
30
40
50
0 2 4 6 8 10 12
%
of
bulking
of
sand
% of water added
Bulking of sand
% of water added Initial Height H1 Final height H2 % of bulking
0
300
300 0.00
2 350 16.67
4 390 30.00
6 430 43.33
8 400 33.33
10 320 6.67
Code book: IS 2386- 1963 Part 3
BASIC TESTING- RED MUD
14
Sl no. Tests conducted Results Code Books Referred Requirements
1 Specific gravity 2.5 IS 2720-1985-part 3 2.8-3.3
2 Plastic limit 28% IS 2720-1985-part 5 -------
3 Liquid limit 40.90% IS 2720-1985-part 5 ------
4 shrinkage limit 11% IS 2720-1985-part 5 -------
5 Sieve analysis IS 2720-1985-part 4 ------
Specific gravity Casagrande apparatus Plastic limit Liquid limit Shrinkage limit
SAMPLES
RED MUD- FINENESS MODULUS
IS sieve
zes(mm)
Weight of Red
mud(g)
%
Retaine
d
Cumulative
retained
% Passing
4.75 272 54.4 54.4 45.6
2.36 84 16.8 71.2 28.8
1.18 48 9.6 80.8 19.2
0.6 52 10.4 91.2 8.8
0.425 8 1.6 92.8 7.2
0.3 18 3.6 96.4 3.6
0.15 12 2.4 98.8 1.2
0.075 0 0 98.8 1.2
pan 0 0 98.8 1.2
15
PLASTIC LIMIT OF RED MUD
16
Trial number 1 2 3
Weight of container(g) 11.05 11.38 11.42
Wet mass+ container(g) 12.93 14.06 13.98
Dry mass+ container(g) 12.515 13.447 13.405
Weight of Water(g) 0.415 0.613 0.575
Weight of dry soil(g) 1.465 2.067 1.985
Moisture content(%) 28.327645 29.65651 28.96725
PLASTIC LIMIT 28.983802
PLASTICITY INDEX 11.958276
<0 Non plastic
<7
slighty
plastic
7 TO 17
medium
plastic
>17
highly
plastic
11.95- medium plastic
LIQUID LIMIT OF RED MUD
No. of blows 13 20 28
Weight of container 5.42 4.91 5.82
Wet mass+ container 12.23 15.12 16.51
Dry mass+ container 10.225 12.133 13.418
Weight of water 2.005 2.987 3.092
Weight of dry soil 4.805 7.223 7.598
Moisture content 41.727367 41.35401 40.69492
17
Liquid limit 40.94208
SPECIFIC GRAVITY OF INCINERATOR WASTE
Table 4. 1 Specific gravity of Incineration waste
Sl.no Details Weight of
Sample(gms)
1 Weight of empty bottle (w1) 26
2 Weight of bottle + water (w2) 76
3 Weight of bottle + kerosene (w3) 66
4 Weight of bottle + IW + kerosene (w4) 82
5 Weight of IW (w5) 30
Specific gravity of Incineration waste =
𝑤5(𝑤3−𝑤1)
𝑤5+𝑤3−𝑤1 (𝑤2−𝑤1)
=
30(66−26)
(30+66−26)(76−26)
= 1.7
18
EDAX- RED MUD
Element Weight % Atomic %
Na 2O 7.15 14.32
Al 2O3 16.52 20.11
Si O2 3.03 6.25
Ca O 0.54 1.19
Ti O2 2.02 3.14
Fe 2O3 70.75 54.99
19
Element Weight % Atomic %
Na 2O 5.73 5.81
Mg O 4.98 7.77
Al 2O3 10.91 6.73
Si O2 8.83 9.25
P 2O5 2.30 1.02
S O3 1.50 1.18
K 2O 4.44 2.97
Ca O 53.57 60.12
Ti O2 5.33 4.20
Fe 2O3 2.43 0.96
EDAX-INCINERATOR WASTE
20
Chemical composition of PC, Red mud and incinerator waste
Before casting of cubes, incinerator waste was mixed with micro silica
using a alkaline activator to check if CaO (Calcium oxide) or carbon is
active in IW or not.
21
Components Na20 Al203 SiO2 CaO TiO2 Fe2O3 MgO P2O5 SO3 K2O N20
Portland Cement - 5.6 21.28 64.64 - 3.36 2.06 - 2.14 - 0.05
Red Mud 7.15 16.52 3.03 0.54 2.02 70.75 - - - - -
Incinerator waste 5.73 10.91 8.83 53.57 5.33 2.43 4.98 2.3 1.5 4.44 -
MIX PROCEDURE
22
DRY MIX OF
MATERIALS
ADDING AMOUNT OF
WATER ACCORDING
TO THE NORMAL
CONSISTENCY
CASTING OF
SPECIMENS
DEMOULDING AND
CURING
TESTING OF
SPECIMENS
DRY MIX OF
MATERIALS
ADDING PREPARED
ALKALINE
ACTIVATOR
CASTING OF CM
AND GM
SPECIMENS
DEMOULDING AND
CURING
TESTING OF
SPECIMENS
Cement mortar Geopolymer mortar
MIX DESIGN FOR CEMENT MORTAR
Unit weight of cement mortar= 2080 kg/m3
Cube size = 70.6x70.6x70.6 mm conforming to IS 10080:1982
Volume = 0.000352m3
Amount of Cement mortar required
2080x0.000352
=0.732 kg
For mortar ratio 1:3,
Cement = 200x9 =1.8kgs
Sand = 600x9 = 5.4kgs (confirming to IS 10080:1982)
Water = (P/4+3) Percentage of combined mass of cement and sand
Where P is normal consistency of cement
Water = (28/4+3) x1/100x1/100
= 80 grams (1 gm = 1ml) = 80 ml
Water = 80x9 = 720 ml
23
24
Quantity of
materials required
for 3 cubes
Days
No.
of
cubes
CTM
reading
Compressive
strength
Average
Compressive
Strength
N/mm2
Cement= 200x3
=600 gms
7th
1 3100 6.10
M sand= 600x3
=1.8 kgs 2 2900 5.71 6.04
Water= 80X3=240ml 3 3200 6.30
Quantity of
materials required
for 3 cubes
Days
No.
of
cubes
CTM
reading
Compressive
strength
Average
Compressive
Strength
N/mm2
Cement= 200x3
=600 gms
14th
4 4200 8.27
M sand= 600x3
=1.8 kgs 5 4400 8.66 8.27
Water= 80X3=240ml 6 4000 7.87
Quantity of
materials required
for 3 cubes
Days
No.
of
cubes
CTM
reading
Compressive
strength
Average
Compressive
Strength
N/mm2
Cement= 200x3
=600 gms
28th
7 5300 10.43
M sand= 600x3
=1.8 kgs 8 5100 10.04 10.37
Water= 80x3=240ml 9 5400 10.63 0
2
4
6
8
10
12
7 14 28
Compressive
strength(N/mm
2
)
Curing period(days)
Compressive strength of Cement mortar cubes
COMPRESSIVE STRENGTH OF CEMENT MORTAR CUBES- 7, 14 AND 28 DAYS
25
MIX DESIGN FOR GEOPOLYMER MORTAR
To prepare NaOH solution, below required amount of pellets were mixed in 1 liter of distilled water for all the
proportions
• 1M = 40gm of NaOH pellets
• 6M= 240gm of NaOH pellets
• 8M= 320gm of NaOH pellets
• 10M= 400gm of NaOH pellets
To prepare Sodium silicate solution, 1M (21.2 gm) of sodium silicate was mixed in already prepared 100ml of
6M, 8M and 10M solution separately to obtain alkaline activator. The solution is done 24 hours prior to the
casting.
• Cube size = 70.6x70.6x70.6 mm conforming to IS 10080:1982
26
• Binder proportion- 10:80:10 (red mud: incinerator waste: micro silica)
Mortar proportion: 1:3(binder proportion: M sand)
10% of 200= 20gm of RM
80% of 200= 160gm of IW
10% of 200= 20gm of MS
M sand = 600 gm confirming to IS 10080:1982
• Binder proportion- 30:60:10 (red mud: incinerator waste: micro silica)
Mortar proportion: 1:3(binder proportion: M sand)
30% of 200= 60gm of RM
60% of 200= 120gm of IW
10% of 200= 20gm of MS
M sand = 600 gm confirming to IS 10080:1982
• Binder proportion- 20:70:10 (red mud: incinerator waste: micro silica)
Mortar proportion: 1:3(binder proportion: M sand)
20% of 200= 40gm of RM
70% of 200= 140gm of IW
10% of 200= 20gm of MS
M sand = 600 gm confirming to IS 10080:1982
27
28
Quantity of
materials required
Alkaline
Activator
(NaOH+
Na2SiO3)
Molarity Days
No.
of
cubes
CTM reading(kg)
Compressive
strength
(N/mm2
)
Average
Compressive
Strength (N/mm2
)
RM= 20x9
=180gms
166.6x9
=1500ml
6M
7th
1 600 1.18
2 300 0.59 1.18
3 200 0.39
IW=160x9
=1140gms
8M
4 690 1.18
1.37
5 700 1.37
6 500 0.98
MS=20x9
=180gms
10M
7 750 1.48
1.63
8 830 1.63
9 600 1.18
RM= 20x9
=180gms
166.6x9
=1500ml
6M
14th
10 700 1.38
11 500 0.98 1.38
12 350 0.69
IW=160x9
=1140gms
8M
13 760 1.50
1.5
14 580 1.14
15 420 0.83
MS=20x9
=180gms
10M
16 900 1.77
1.77
17 650 1.28
18 450 0.89
RM= 20x9
=180gms
166.6x9
=1500ml
6M
28th
19 800 1.57
20 700 1.38 1.57
21 500 0.98
IW=160x9
=1140gms
8M
22 890 1.75
1.75
23 760 1.50
24 530 1.04
MS=20x9
=180gms
10M
25 950 1.87
1.87
26 810 1.59
27 580 1.14
1
1.2
1.4
1.6
1.8
2
7 14 28
COMPRESSIVE
STRENGTH9N/MM
2
)
CURING PERIOD (DAYS)
RM10
6M
8M
10M
29
Variation of compressive strength with 7,14 and 28 days of curing for RM10
Test results of Compressive strength of GM cube of 10:80:10 (RM: IW:MS) proportion
Quantity of
materials required
Alkaline
Activator
(NaOH+
Na2SiO3)
Molarity Days
No.
of
cubes
CTM
reading(kg)
Compressive
strength
(N/mm2
)
Average
Compressive
Strength
(N/mm2
)
RM= 40x9
=360gms
166.6x9
=1500ml
6M
7th
28 600 0.98
29 700 1.38 1.37
30 600 0.98
IW=140x9
=1260gms
8M
31 600 1.18
1.57
32 800 1.57
33 500 0.98
MS=20x9
=180gms
10M
34 750 1.48
1.71
35 870 1.71
36 600 1.18
RM= 40x9
=360gms
166.6x9
=1500ml
6M
14th
37 700 1.38
38 800 1.57 1.57
39 700 1.38
IW=140x9
=1260gms
8M
40 800 1.57
1.73
41 680 1.34
42 880 1.73
MS=20x9
=180gms
10M
43 850 1.67
1.81
44 760 1.50
45 920 1.81
RM= 40x9
=360gms
166.6x9
=1500ml
6M
28th
46 800 1.57
47 850 1.67 1.73
48 880 1.73
IW=140x9
=1260gms
8M
49 870 1.71
1.81
50 900 1.77
51 920 1.81
MS=20x9
=180gms
10M
52 920 1.81
1.95
53 960 1.89
54 990 1.95
1.2
1.4
1.6
1.8
2
7 14 28
COMPRESSIVE
STRENGTH9N/MM
2
)
CURING PERIOD(DAYS)
RM20
6M
8M
10M
30
Variation of compressive strength with 7,14 and 28 days of curing for RM20
Test results of Compressive strength of GM cube of 20:70:10 (RM: IW:MS) proportion
Quantity of
materials required
Alkaline
Activator
(NaOH+
Na2SiO3)
Molarity Days
No.
of
cubes
CTM
reading(kg)
Compressive
strength
(N/mm2
)
Average
Compressive
Strength
(N/mm2
)
RM= 60x9
=540gms
166.6x9
=1500ml
6M
7th
55 790 1.55
56 840 1.65 1.65
57 700 1.38
IW=120x9
=1080gms
8M
58 850 1.67
1.79
59 910 1.79
60 700 1.38
MS=20x9
=180gms
10M
61 940 1.85
1.91
62 970 1.91
63 810 1.59
RM= 60x9
=540gms
166.6x9
=1500ml
6M
14th
64 820 1.61
65 930 1.83 1.83
66 700 1.38
IW=120x9
=1080gms
8M
67 860 1.69
1.91
68 970 1.91
69 780 1.54
MS=20x9
=180gms
10M
70 910 1.79
2.16
71 1100 2.16
72 840 1.65
RM= 60x9
=540gms
166.6x9
=1500ml
6M
28th
73 900 1.77
74 980 1.93 1.93
75 800 1.57
IW=120x9
=1080gms
8M
76 950 1.87
2.16
77 1100 2.16
78 900 1.77
MS=20x9
=180gms
10M
79 990 1.95
2.36
80 1200 2.36
81 960 1.89
1.4
1.6
1.8
2
2.2
2.4
7 14 28
COMPRESSIVE
STRENGTH9N/MM
2
)
CURING PERIOD (DAYS)
RM30
6M
8M
10M
31
Variation of compressive strength with 7,14 and 28 days of curing for RM30
Test results of Compressive strength of GM cube of 30:60:10 (RM: IW:MS) proportion
32
Compressive strength of Cement Mortar, RM10, RM20 and RM30
Variation of compressive strength with Red mud percentage
Variation of compressive strength with molarity for RM10, RM20 and RM30
EDAX Analysis of Geopolymer mix (RM and IW mix)
Element
Weight
%
Atomic
%
Na 2O 23.95 25.50
Mg O 0.73 1.19
Al 2O3 7.91 5.12
Si O2 31.83 34.97
S O3 1.41 1.17
Cl 2O 7.11 5.40
K 2O 1.21 0.85
Ca O 19.79 23.29
Fe 2O3 6.06 2.51
33
SEM Analysis of Geopolymer mix (RM and IW mix)
34
35
CONCLUSION
 The EDAX patterns of red mud consists of elements like Na2O(10.41%), MgO(1.66%), Al2O3(26.74%), SiO2(8.10%), K2O(0.29%),
CaO(1.32%), TiO2(4.42%) and Fe2O3(47.06%). On observation, Aluminum content was sufficient and less hazardous.
 The EDAX patterns of incinerator waste consists Na2O (1.75%), MgO(2.90%), Al2O3(0.85%), SiO2(2.19%), K2O(3.19%), CaO(82.91%),
TiO2(1.56%), P2O5(1.86%), SO3(1.05%), Fe2O3(1.04%). On observation, Micro silica was added to improve silica content.
• On trying different molarities on different proportions, the optimum molarity is found to be 10M for all three percentages of red mud
variation of mortar composition 1:3 binder to fine aggregate ratio.
• Out of three Mortar proportions, Mortar proportion with 30:60:10 (Red mud: incinerator waste: micro silica) i.e., 30% Red mud and 60%
incinerator waste exhibited the maximum strength.
• Compressive strength of geopolymer mortar samples increases with increase in red mud percentages.
36
SCOPE FOR FUTURE WORK
• Red mud and silica based geopolymer blocks can be tested for durability.
• Other waste with presence of silica can be tried with red mud.
• Also, the incineration waste can be tried in combination with other waste containing alumina.
• Can be tried for 12 Molarity and above variations.
• Can be tried for concrete as well.
37
REFERENCES
[1]. A. Naghizadeh, S.O Ekolu, “Effect of Mix Parameters on Strength of Geopolymers Experimental study,” Sixth International Conference on
Durability of Concrete Structures, July 2018.
[2]. C.D. Budh and N.R Warhade, “Effect of Molarity on Compressive Strength of Geopolymer Mortar,” IJCER, ISSN 2278-3652 Volume 5,
Number 1 (2014).
[3]. Sara banu. J, Dr.Kumutha. R, Dr.Vijai. K, “A Review on Durability Studies of Geopolymer Concrete and Mortar under Aggressive
Environment,” SSRG – IJCE – Volume 4 Issue 5 – May 2017
[4]. Karuppuchamy k, Ananth Kumar M, “Effect of Alkaline Solution with Varying Mix Proportion on Geopolymer Mortar,” IOP Conf. Series:
Materials Science and Engineering, 2018.
[5]. MohamedG. Khalil, Fareed Elgabbas, Mohamed.El-Feky, Hany El-Shafie, “Performance of geopolymer mortar cured under ambient
temperature,” Elsevier, Aug. 2019.
[6]. Sagarika panda, Ramakantha Panigrahi, “Compressive strength of Mortar with Alkali Activated fly ash and Ground Granulated Blast
Furnace Slag,” IOP Conference Series: Material Science Engineering, Dec. 2020.
[7]. Sarat Kumar Dasa, Subrat Kumar Routb, Shamshad Alamc, “Characterization of Red Mud as a Subgrade Construction Material,”
Conference paper, Dec. 2015.
[8]. Subhashree Samantasinghar and Suresh Prasad Singh, “Fresh and Hardened Properties of Fly Ash– Slag Blended Geopolymer Paste and
Mortar,” IJCSM, 2019.
[9]. Smitha Singh, Dr. M. U. Aswath, Dr. R.V. Ranganath, “Effect of curing methods on red mud based geopolymer mortar,” International
Journal of Civil Engineering and Technology (IJCIET) Volume 8, Issue 10, October 2017
[10]. Davinder Singh, Arvind Kumar, “Performance Evaluation and Geo-Characterization of Municipal Solid Waste Incineration Ash Material
Amended with Cement and Fiber”, Department of civil engineering, 10 May 2017.
[11]. IS 4031 (Part 6): 1988, “Methods of physical tests for hydraulic cement: Part 6 Determination of compressive strength of hydraulic
cement”.
38
THANK YOU
39

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Experimental study on strength aspects of redmud and incinerator waste based

  • 1. DAYANANDA SAGAR COLLEGE OF ENGINEERING An Autonomous Institution affiliated to Visvesvaraya Technological University, Belagavi, Shavige Malleswara Hills, Kumara swamy layout Bangalore – 560078 DEPARTMENT OF CIVIL ENGINEERING “EXPERIMENTAL STUDY ON STRENGTH ASPECT OF RED MUD AND INCINERATOR WASTE BASED GEOPOLYMER MORTAR” Presented by: PRIYANKA H J IV SEM, MTech 1DS21CSE14 Under the Guidance of: Dr. NEETHU URS Professor DSCE, Bangalore FINAL VIVA - 2023 1
  • 2. CONTENTS • Abstract • Introduction • Literature review • Objectives • Methodology • Basic material testing • EDAX analysis of RM and IW • Mix procedure • Mix design • Test results and comparison • SEM and EDAX analysis of geopolymer mix • Conclusion • Scope for future work • References 2
  • 3. ABSTRACT • The most important and widely used material in construction is concrete and its major component is cement, basically known as Ordinary Portland cement (OPC). Since, OPC is well known for its high emission of CO2 gas. • When looking for alternatives that need less energy or raw materials other than limestone will help minimize CO2 emissions from an environmental standpoint. Geopolymers are promising alternative materials for Portland cement. • Geopolymer are amorphous three-dimensional Alumina-Silicate binder material, which is produced by copolymerization of aluminosilicate materials with alkaline solutions, exhibits higher mechanical strength and excellent durability properties. • Several aluminosilicate industrial wastes such as fly ash, Metakaolin, red mud etc. can be used as source materials for geopolymer concrete production. These wastes are used as source materials to produce geopolymer as it contains high silica and alumina content. • In the present experimental study, Red Mud, incinerator waste and Micro silica as binder need to be added alkaline activator in the form of sodium silicate (Na2SiO3) and sodium hydroxide (NaOH). Molarity variation of NaOH is taken as 6, 8, 10 M. • Mortar proportion with 30% red mud and 60% incinerator waste exhibited maximum strength. Highest strength obtained for geopolymer mortar was 2.36 MPa with 30% red mud and 60% incinerator waste and 10M molarity. 3
  • 4. INTRODUCTION • Concrete is the most predominantly used construction material. The basic ingredient of concrete is cement, the mass production of cement increases carbon footprints and thus becomes a major contributor for global warming. • One promising option to lessen the environmental impact of conventional cement-based materials is Geopolymers. • Geopolymers are alumina-silicate bonds which are sustainable, inorganic materials used in construction that can replace traditional cement and concrete, offering environmental friendly alternatives with strong, durable properties. • Since, cement contains alumina, silica and other elements. Here in this study, Incinerator waste and Red mud that is produced by industries containing alumina and silica which goes as landfill is used as an replacement for cement. • Physical and chemical properties of red mud and incinerator waste are investigated. Microstructural analysis are studied and a comparative explanation between strength parameters of two the samples are presented. 4
  • 5. LITERATURE REVIEW TITLE YEAR PUBLISHER AUTHOR INFERENCE Effect of Molarity on Compressive Strength of Geopolymer Mortar 2014 IJCER C.D. Budh and N.R. Warhade Tests was carried out on 70.6x70.6x70.6mm Geopolymer mortar specimen. The ratio of alkaline liquid to fly ash is taken as 0.5. The obtained compressive strength was validated by NDT results. Compressive strength increases with increase in molarity. Also, velocity increases with increase in molarity. Characterization of Red Mud as a Subgrade Construction Material 2015 - Sarat Kumar Dasa , Subrat Kumar Routb , Shamshad Alam Basic properties like specific gravity, particle size distribution, Atterberg’s limits, OMC and MDD are determined. Engineering property like shear strength are determined. The model footing test was performed to check sustainability of red mud as pavement subgrade material. FE analysis was performed and results were compared with the laboratory results. Effect of curing methods of red mud based geopolymer mortar 2017 IAEME Smita Singh, Dr. M. U. Aswath, Dr. R.V. Ranganath Compressive strength, tensile strength and modulus of elasticity thermally cured and ambient cured specimens were discussed. Strength of thermally cured mortar improved with molarity whereas ambient cured mortar possessed better strength at lower molarity. Tensile strength followed similar pattern as compressive strength. Ambient cured mortars were found to be stiffer than the thermally cured ones. Effect of Alkaline Solution with Varying Mix Proportion on Geopolymer Mortar 2017 IOP Ananthkumar M, Raghavapriya S Specimens of different NaOH solution (10M, 12M and 15M) for different mix proportion (1:1, 1:2 and 1:3) and 60°C-80° C curing temperature were cast. The densities, compressive strength, alkalinity, co-efficient of absorption were determined.High curing temperatures produces higher strength. Mixes with 12M showed higher compressive strength than the rest proportions. Effect of Mix Parameters on Strength of Geopolymer Mortars Experimental Study 2018 - A. Naghizadeh and S.O. Ekolu 1.0- 3.0 (SS to SH) alkaline activator ratios were used with SS modulus= 2.5 and NaOH as 10-14M. Mortars of 2.25 A/B ratio were used to prepare 50 mm cubes with L/S ratio from 0.3-0.6. All specimens showed significant influence on compressive strength development. But, the optimum strength was at SS/SH= 2.0 , 12M and L/S=0.5. 5
  • 6. LITERATURE REVIEW TITLE YEAR PUBLISHER AUTHOR INFERENCE Preparation of red mud-based geopolymer materials from MSWI fly ash and red mud by mechanical activation 2018 Elsevier Yuancheng Li, Xiaobo Min, Yong Ke, Degang Liu, Chongjian Tang, Municipal solid waste incineration fly ash (MSWIFA) and red mud were utilized to prepare red mud-based geopolymer materials (RGM). The hydration characteristics long-term stability and physical properties of RGM were tested. Results showed that mechanical activation can not only effectively activate red mud, but also effectively improve the reaction of MSWIFA and red mud. When 14% sodium silicate was added to the binder, the UCS reached 12.75 MPa at 28 days. Performance of geopolymer mortar cured under ambient temperature 2019 Elsevier Mohamed G. Khalil, Fareed Elgabbas , Mohamed S. El-Feky , Hany El-Shafie The base material (GGBS and MK), water/binder ratio (0.0, and 15.0%), and modulus of silicate (1.1, 1.3, 1.5, and 1.7) were considered. Fresh and hardened properties were examined. It was observed that by increasing the modulus of silicate, the workability increased and the compressive strength decreased. 1.7 modulus of silicate is the optimum mixture and compressive strength of the optimum mixture after 7, 28 and 90 days of water curing were 19.6, 33.4 and 35.6 Mpa and its flowability was about 150%. Fresh and Hardened Properties of Fly Ash– Slag Blended Geopolymer Paste and Mortar 2019 IJCSM Subhashree Samantasinghr and Suresh Prasad Singh fresh and hardened properties of fly ash and slag blended mortar are investigated and results are determined. Additionally, bonding and microstructural changes are examined. The fresh properties of geopolymers were found within the prescribed range of OPC. compressive strength of mortar specimens increases with an increase of slag content in the mix Compressive strength of mortar with alkali activated fly ash and GGBS 2020 IOP Sagarika panda, Ramakantha panigrahi Fly ash and GGBS as binder materials, specimens were prepared for compressive strength check. Compressive strength achieved from temperature cured is higher than ambient cured samples. GGBS content was directly proportional to the compressive strength of mortar specimen. Properties of red-mud-based geopolymers in the light of their chemical composition 2024 IOP Ali Abdulhasan Khalaf, Katalin Kopecskó Statistical analysis has been performed on the major oxides of red mud to understand the relationship between chemical composition and properties (e.g., workability, setting time, compressive strength, etc.) of red mud-based geopolymer composite. With the results, it is concluded that red mud can be a suitable binder by blending with other geopolymer source materials to achieve the desired fresh and mechanical properties. 6
  • 7. OBJECTIVES • To find the optimum percentage of red mud & incinerator waste for preparation of geopolymer mortar. • To study the strength characteristics of red mud and incinerator waste based geopolymer mortar. • To study the surface morphology of Geopolymer mix (red mud and incinerator waste mix) from SEM analysis. 7
  • 8. METHODOLOGY 8 LITERATURE SURVEY COLLECTION OF MATERIALS BASIC TESTING AND CASTING OF CM AND GM SPECIMEN STRENGTH TESTING OF CM AND GM SPECIMEN RESULT AND ANALYSIS CONCLUSION BASED ON OBSERVATION
  • 9. METHODOLOGY- DESCRIPTION  Exhaustive literature survey was carried out regarding various topics of project like geopolymer, incinerator wastes (fly ash, red mud), mix design various standard testing methods etc.  OPC 53 grade cement and sand were collected and utilized.  Various tests on materials (Cement, fine aggregate, incinerator waste, red mud) was conducted.  Based on test result of materials, cement mortar mix was done in accordance to IS 4031:1988.  XRD Analysis/EDAX analysis was done for red mud and incinerator waste samples to find the aluminum and silica content in it.  To prepare alkaline solution, NaOH pellets were made to dissolve in distilled water based on required molarity and then mixed with required amount of sodium silicate solution 24 hours prior to the preparation of geopolymer mortar. (1M = 40gm of NaOH pellets)  Preparing geopolymer mortar by varying percentage of red mud and incinerator waste and Mix proportion trial for product of mortar was done.  Based on mix design cubes were casted and strength tests was conducted on 7, 14, 28 days for the same. Based on the results, conclusions are drawn control mix and these results will be compared with geopolymer mortar cube.  SEM analysis was done post testing of geopolymer mortar cubes and Project report will be prepared in detail. 9
  • 10. BASIC TESTING- CEMENT Sl no. Tests conducted Results Requirements as per IS 12269-2013 1 Specific gravity 2.93 2.9-3.15 2 Normal consistency 28% ---- 3 Initial setting time 35 min >30 min 4 final setting time 160 min 600 min 5 fineness 7.5% ---- 10 Specific gravity Normal consistency Fineness Mould post NC test
  • 11. BASIC TESTING- M SAND Sl no. Tests conducted Results 1 Fineness modulus 3.14 2 Specific gravity 2.5 3 Bulking of sand 6% 4 Bulk density 1650 kg/m3 5 Water absorption 0.80% 11 Fineness modulus Specific gravity Bulking of sand Bulk density Code book: IS 2386- 1963 part3
  • 12. FINENESS MODULUS OF M SAND Sl. No. IS Sieve Size Weight Retained (gm) Percentage of weight retained Cumulative percentage retained Percentage of fine aggregate passing 1 4.75 mm 38 3.8 3.8 96.2 2 2.36 mm 161 16.1 19.9 80.1 3 1.18 mm 235 23.5 43.4 56.6 4 600 187 18.7 62.1 37.9 5 300 245 24.5 86.6 13.4 6 150 120 12 98.6 1.4 7 pan 11 1.1 99.7 0.3 RESULTS %gravel 3.8 D60 mm 1.3507234 Cu=D60/D10 5.245527784 % sand 98.6 D30 mm 0.50326531 Cc=D30*2/D60*D10 0.191883573 %fine 0.98 D10 mm 0.2575 D60 0.1 60 1.35072 0 1.3507234 60 1.35072 60 D30 0.1 30 0.50327 0 0.50326531 30 0.50327 30 D10 0.1 10 0.2575 0 Fineness modulus of fine aggregate= 314.4/100 = 3.144 12 Fine sand 2.2-2.6 Medium sand 2.6-2.9 Coarse sand 2.9-3.2 Code book: IS 383-1970
  • 13. BULKING OF SAND Bulking of sand = 𝐻2 −𝐻1 𝐻1 𝑥 100 Volume of sand taken= 300ml % of water added each time = 2% =2% of 300 = 6ml 13 0 10 20 30 40 50 0 2 4 6 8 10 12 % of bulking of sand % of water added Bulking of sand % of water added Initial Height H1 Final height H2 % of bulking 0 300 300 0.00 2 350 16.67 4 390 30.00 6 430 43.33 8 400 33.33 10 320 6.67 Code book: IS 2386- 1963 Part 3
  • 14. BASIC TESTING- RED MUD 14 Sl no. Tests conducted Results Code Books Referred Requirements 1 Specific gravity 2.5 IS 2720-1985-part 3 2.8-3.3 2 Plastic limit 28% IS 2720-1985-part 5 ------- 3 Liquid limit 40.90% IS 2720-1985-part 5 ------ 4 shrinkage limit 11% IS 2720-1985-part 5 ------- 5 Sieve analysis IS 2720-1985-part 4 ------ Specific gravity Casagrande apparatus Plastic limit Liquid limit Shrinkage limit SAMPLES
  • 15. RED MUD- FINENESS MODULUS IS sieve zes(mm) Weight of Red mud(g) % Retaine d Cumulative retained % Passing 4.75 272 54.4 54.4 45.6 2.36 84 16.8 71.2 28.8 1.18 48 9.6 80.8 19.2 0.6 52 10.4 91.2 8.8 0.425 8 1.6 92.8 7.2 0.3 18 3.6 96.4 3.6 0.15 12 2.4 98.8 1.2 0.075 0 0 98.8 1.2 pan 0 0 98.8 1.2 15
  • 16. PLASTIC LIMIT OF RED MUD 16 Trial number 1 2 3 Weight of container(g) 11.05 11.38 11.42 Wet mass+ container(g) 12.93 14.06 13.98 Dry mass+ container(g) 12.515 13.447 13.405 Weight of Water(g) 0.415 0.613 0.575 Weight of dry soil(g) 1.465 2.067 1.985 Moisture content(%) 28.327645 29.65651 28.96725 PLASTIC LIMIT 28.983802 PLASTICITY INDEX 11.958276 <0 Non plastic <7 slighty plastic 7 TO 17 medium plastic >17 highly plastic 11.95- medium plastic
  • 17. LIQUID LIMIT OF RED MUD No. of blows 13 20 28 Weight of container 5.42 4.91 5.82 Wet mass+ container 12.23 15.12 16.51 Dry mass+ container 10.225 12.133 13.418 Weight of water 2.005 2.987 3.092 Weight of dry soil 4.805 7.223 7.598 Moisture content 41.727367 41.35401 40.69492 17 Liquid limit 40.94208
  • 18. SPECIFIC GRAVITY OF INCINERATOR WASTE Table 4. 1 Specific gravity of Incineration waste Sl.no Details Weight of Sample(gms) 1 Weight of empty bottle (w1) 26 2 Weight of bottle + water (w2) 76 3 Weight of bottle + kerosene (w3) 66 4 Weight of bottle + IW + kerosene (w4) 82 5 Weight of IW (w5) 30 Specific gravity of Incineration waste = 𝑤5(𝑤3−𝑤1) 𝑤5+𝑤3−𝑤1 (𝑤2−𝑤1) = 30(66−26) (30+66−26)(76−26) = 1.7 18
  • 19. EDAX- RED MUD Element Weight % Atomic % Na 2O 7.15 14.32 Al 2O3 16.52 20.11 Si O2 3.03 6.25 Ca O 0.54 1.19 Ti O2 2.02 3.14 Fe 2O3 70.75 54.99 19
  • 20. Element Weight % Atomic % Na 2O 5.73 5.81 Mg O 4.98 7.77 Al 2O3 10.91 6.73 Si O2 8.83 9.25 P 2O5 2.30 1.02 S O3 1.50 1.18 K 2O 4.44 2.97 Ca O 53.57 60.12 Ti O2 5.33 4.20 Fe 2O3 2.43 0.96 EDAX-INCINERATOR WASTE 20
  • 21. Chemical composition of PC, Red mud and incinerator waste Before casting of cubes, incinerator waste was mixed with micro silica using a alkaline activator to check if CaO (Calcium oxide) or carbon is active in IW or not. 21 Components Na20 Al203 SiO2 CaO TiO2 Fe2O3 MgO P2O5 SO3 K2O N20 Portland Cement - 5.6 21.28 64.64 - 3.36 2.06 - 2.14 - 0.05 Red Mud 7.15 16.52 3.03 0.54 2.02 70.75 - - - - - Incinerator waste 5.73 10.91 8.83 53.57 5.33 2.43 4.98 2.3 1.5 4.44 -
  • 22. MIX PROCEDURE 22 DRY MIX OF MATERIALS ADDING AMOUNT OF WATER ACCORDING TO THE NORMAL CONSISTENCY CASTING OF SPECIMENS DEMOULDING AND CURING TESTING OF SPECIMENS DRY MIX OF MATERIALS ADDING PREPARED ALKALINE ACTIVATOR CASTING OF CM AND GM SPECIMENS DEMOULDING AND CURING TESTING OF SPECIMENS Cement mortar Geopolymer mortar
  • 23. MIX DESIGN FOR CEMENT MORTAR Unit weight of cement mortar= 2080 kg/m3 Cube size = 70.6x70.6x70.6 mm conforming to IS 10080:1982 Volume = 0.000352m3 Amount of Cement mortar required 2080x0.000352 =0.732 kg For mortar ratio 1:3, Cement = 200x9 =1.8kgs Sand = 600x9 = 5.4kgs (confirming to IS 10080:1982) Water = (P/4+3) Percentage of combined mass of cement and sand Where P is normal consistency of cement Water = (28/4+3) x1/100x1/100 = 80 grams (1 gm = 1ml) = 80 ml Water = 80x9 = 720 ml 23
  • 24. 24
  • 25. Quantity of materials required for 3 cubes Days No. of cubes CTM reading Compressive strength Average Compressive Strength N/mm2 Cement= 200x3 =600 gms 7th 1 3100 6.10 M sand= 600x3 =1.8 kgs 2 2900 5.71 6.04 Water= 80X3=240ml 3 3200 6.30 Quantity of materials required for 3 cubes Days No. of cubes CTM reading Compressive strength Average Compressive Strength N/mm2 Cement= 200x3 =600 gms 14th 4 4200 8.27 M sand= 600x3 =1.8 kgs 5 4400 8.66 8.27 Water= 80X3=240ml 6 4000 7.87 Quantity of materials required for 3 cubes Days No. of cubes CTM reading Compressive strength Average Compressive Strength N/mm2 Cement= 200x3 =600 gms 28th 7 5300 10.43 M sand= 600x3 =1.8 kgs 8 5100 10.04 10.37 Water= 80x3=240ml 9 5400 10.63 0 2 4 6 8 10 12 7 14 28 Compressive strength(N/mm 2 ) Curing period(days) Compressive strength of Cement mortar cubes COMPRESSIVE STRENGTH OF CEMENT MORTAR CUBES- 7, 14 AND 28 DAYS 25
  • 26. MIX DESIGN FOR GEOPOLYMER MORTAR To prepare NaOH solution, below required amount of pellets were mixed in 1 liter of distilled water for all the proportions • 1M = 40gm of NaOH pellets • 6M= 240gm of NaOH pellets • 8M= 320gm of NaOH pellets • 10M= 400gm of NaOH pellets To prepare Sodium silicate solution, 1M (21.2 gm) of sodium silicate was mixed in already prepared 100ml of 6M, 8M and 10M solution separately to obtain alkaline activator. The solution is done 24 hours prior to the casting. • Cube size = 70.6x70.6x70.6 mm conforming to IS 10080:1982 26
  • 27. • Binder proportion- 10:80:10 (red mud: incinerator waste: micro silica) Mortar proportion: 1:3(binder proportion: M sand) 10% of 200= 20gm of RM 80% of 200= 160gm of IW 10% of 200= 20gm of MS M sand = 600 gm confirming to IS 10080:1982 • Binder proportion- 30:60:10 (red mud: incinerator waste: micro silica) Mortar proportion: 1:3(binder proportion: M sand) 30% of 200= 60gm of RM 60% of 200= 120gm of IW 10% of 200= 20gm of MS M sand = 600 gm confirming to IS 10080:1982 • Binder proportion- 20:70:10 (red mud: incinerator waste: micro silica) Mortar proportion: 1:3(binder proportion: M sand) 20% of 200= 40gm of RM 70% of 200= 140gm of IW 10% of 200= 20gm of MS M sand = 600 gm confirming to IS 10080:1982 27
  • 28. 28
  • 29. Quantity of materials required Alkaline Activator (NaOH+ Na2SiO3) Molarity Days No. of cubes CTM reading(kg) Compressive strength (N/mm2 ) Average Compressive Strength (N/mm2 ) RM= 20x9 =180gms 166.6x9 =1500ml 6M 7th 1 600 1.18 2 300 0.59 1.18 3 200 0.39 IW=160x9 =1140gms 8M 4 690 1.18 1.37 5 700 1.37 6 500 0.98 MS=20x9 =180gms 10M 7 750 1.48 1.63 8 830 1.63 9 600 1.18 RM= 20x9 =180gms 166.6x9 =1500ml 6M 14th 10 700 1.38 11 500 0.98 1.38 12 350 0.69 IW=160x9 =1140gms 8M 13 760 1.50 1.5 14 580 1.14 15 420 0.83 MS=20x9 =180gms 10M 16 900 1.77 1.77 17 650 1.28 18 450 0.89 RM= 20x9 =180gms 166.6x9 =1500ml 6M 28th 19 800 1.57 20 700 1.38 1.57 21 500 0.98 IW=160x9 =1140gms 8M 22 890 1.75 1.75 23 760 1.50 24 530 1.04 MS=20x9 =180gms 10M 25 950 1.87 1.87 26 810 1.59 27 580 1.14 1 1.2 1.4 1.6 1.8 2 7 14 28 COMPRESSIVE STRENGTH9N/MM 2 ) CURING PERIOD (DAYS) RM10 6M 8M 10M 29 Variation of compressive strength with 7,14 and 28 days of curing for RM10 Test results of Compressive strength of GM cube of 10:80:10 (RM: IW:MS) proportion
  • 30. Quantity of materials required Alkaline Activator (NaOH+ Na2SiO3) Molarity Days No. of cubes CTM reading(kg) Compressive strength (N/mm2 ) Average Compressive Strength (N/mm2 ) RM= 40x9 =360gms 166.6x9 =1500ml 6M 7th 28 600 0.98 29 700 1.38 1.37 30 600 0.98 IW=140x9 =1260gms 8M 31 600 1.18 1.57 32 800 1.57 33 500 0.98 MS=20x9 =180gms 10M 34 750 1.48 1.71 35 870 1.71 36 600 1.18 RM= 40x9 =360gms 166.6x9 =1500ml 6M 14th 37 700 1.38 38 800 1.57 1.57 39 700 1.38 IW=140x9 =1260gms 8M 40 800 1.57 1.73 41 680 1.34 42 880 1.73 MS=20x9 =180gms 10M 43 850 1.67 1.81 44 760 1.50 45 920 1.81 RM= 40x9 =360gms 166.6x9 =1500ml 6M 28th 46 800 1.57 47 850 1.67 1.73 48 880 1.73 IW=140x9 =1260gms 8M 49 870 1.71 1.81 50 900 1.77 51 920 1.81 MS=20x9 =180gms 10M 52 920 1.81 1.95 53 960 1.89 54 990 1.95 1.2 1.4 1.6 1.8 2 7 14 28 COMPRESSIVE STRENGTH9N/MM 2 ) CURING PERIOD(DAYS) RM20 6M 8M 10M 30 Variation of compressive strength with 7,14 and 28 days of curing for RM20 Test results of Compressive strength of GM cube of 20:70:10 (RM: IW:MS) proportion
  • 31. Quantity of materials required Alkaline Activator (NaOH+ Na2SiO3) Molarity Days No. of cubes CTM reading(kg) Compressive strength (N/mm2 ) Average Compressive Strength (N/mm2 ) RM= 60x9 =540gms 166.6x9 =1500ml 6M 7th 55 790 1.55 56 840 1.65 1.65 57 700 1.38 IW=120x9 =1080gms 8M 58 850 1.67 1.79 59 910 1.79 60 700 1.38 MS=20x9 =180gms 10M 61 940 1.85 1.91 62 970 1.91 63 810 1.59 RM= 60x9 =540gms 166.6x9 =1500ml 6M 14th 64 820 1.61 65 930 1.83 1.83 66 700 1.38 IW=120x9 =1080gms 8M 67 860 1.69 1.91 68 970 1.91 69 780 1.54 MS=20x9 =180gms 10M 70 910 1.79 2.16 71 1100 2.16 72 840 1.65 RM= 60x9 =540gms 166.6x9 =1500ml 6M 28th 73 900 1.77 74 980 1.93 1.93 75 800 1.57 IW=120x9 =1080gms 8M 76 950 1.87 2.16 77 1100 2.16 78 900 1.77 MS=20x9 =180gms 10M 79 990 1.95 2.36 80 1200 2.36 81 960 1.89 1.4 1.6 1.8 2 2.2 2.4 7 14 28 COMPRESSIVE STRENGTH9N/MM 2 ) CURING PERIOD (DAYS) RM30 6M 8M 10M 31 Variation of compressive strength with 7,14 and 28 days of curing for RM30 Test results of Compressive strength of GM cube of 30:60:10 (RM: IW:MS) proportion
  • 32. 32 Compressive strength of Cement Mortar, RM10, RM20 and RM30 Variation of compressive strength with Red mud percentage Variation of compressive strength with molarity for RM10, RM20 and RM30
  • 33. EDAX Analysis of Geopolymer mix (RM and IW mix) Element Weight % Atomic % Na 2O 23.95 25.50 Mg O 0.73 1.19 Al 2O3 7.91 5.12 Si O2 31.83 34.97 S O3 1.41 1.17 Cl 2O 7.11 5.40 K 2O 1.21 0.85 Ca O 19.79 23.29 Fe 2O3 6.06 2.51 33
  • 34. SEM Analysis of Geopolymer mix (RM and IW mix) 34
  • 35. 35
  • 36. CONCLUSION  The EDAX patterns of red mud consists of elements like Na2O(10.41%), MgO(1.66%), Al2O3(26.74%), SiO2(8.10%), K2O(0.29%), CaO(1.32%), TiO2(4.42%) and Fe2O3(47.06%). On observation, Aluminum content was sufficient and less hazardous.  The EDAX patterns of incinerator waste consists Na2O (1.75%), MgO(2.90%), Al2O3(0.85%), SiO2(2.19%), K2O(3.19%), CaO(82.91%), TiO2(1.56%), P2O5(1.86%), SO3(1.05%), Fe2O3(1.04%). On observation, Micro silica was added to improve silica content. • On trying different molarities on different proportions, the optimum molarity is found to be 10M for all three percentages of red mud variation of mortar composition 1:3 binder to fine aggregate ratio. • Out of three Mortar proportions, Mortar proportion with 30:60:10 (Red mud: incinerator waste: micro silica) i.e., 30% Red mud and 60% incinerator waste exhibited the maximum strength. • Compressive strength of geopolymer mortar samples increases with increase in red mud percentages. 36
  • 37. SCOPE FOR FUTURE WORK • Red mud and silica based geopolymer blocks can be tested for durability. • Other waste with presence of silica can be tried with red mud. • Also, the incineration waste can be tried in combination with other waste containing alumina. • Can be tried for 12 Molarity and above variations. • Can be tried for concrete as well. 37
  • 38. REFERENCES [1]. A. Naghizadeh, S.O Ekolu, “Effect of Mix Parameters on Strength of Geopolymers Experimental study,” Sixth International Conference on Durability of Concrete Structures, July 2018. [2]. C.D. Budh and N.R Warhade, “Effect of Molarity on Compressive Strength of Geopolymer Mortar,” IJCER, ISSN 2278-3652 Volume 5, Number 1 (2014). [3]. Sara banu. J, Dr.Kumutha. R, Dr.Vijai. K, “A Review on Durability Studies of Geopolymer Concrete and Mortar under Aggressive Environment,” SSRG – IJCE – Volume 4 Issue 5 – May 2017 [4]. Karuppuchamy k, Ananth Kumar M, “Effect of Alkaline Solution with Varying Mix Proportion on Geopolymer Mortar,” IOP Conf. Series: Materials Science and Engineering, 2018. [5]. MohamedG. Khalil, Fareed Elgabbas, Mohamed.El-Feky, Hany El-Shafie, “Performance of geopolymer mortar cured under ambient temperature,” Elsevier, Aug. 2019. [6]. Sagarika panda, Ramakantha Panigrahi, “Compressive strength of Mortar with Alkali Activated fly ash and Ground Granulated Blast Furnace Slag,” IOP Conference Series: Material Science Engineering, Dec. 2020. [7]. Sarat Kumar Dasa, Subrat Kumar Routb, Shamshad Alamc, “Characterization of Red Mud as a Subgrade Construction Material,” Conference paper, Dec. 2015. [8]. Subhashree Samantasinghar and Suresh Prasad Singh, “Fresh and Hardened Properties of Fly Ash– Slag Blended Geopolymer Paste and Mortar,” IJCSM, 2019. [9]. Smitha Singh, Dr. M. U. Aswath, Dr. R.V. Ranganath, “Effect of curing methods on red mud based geopolymer mortar,” International Journal of Civil Engineering and Technology (IJCIET) Volume 8, Issue 10, October 2017 [10]. Davinder Singh, Arvind Kumar, “Performance Evaluation and Geo-Characterization of Municipal Solid Waste Incineration Ash Material Amended with Cement and Fiber”, Department of civil engineering, 10 May 2017. [11]. IS 4031 (Part 6): 1988, “Methods of physical tests for hydraulic cement: Part 6 Determination of compressive strength of hydraulic cement”. 38