production of geopolymerfoam with addition of nanoparticles · bs en 1364.specimen size...
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Production of geopolymer foam with addition of nanoparticles
Dr. Tomi NissinenGeopolymer Camp 2018
10/07/2018
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• NAMI – Your Materials Expert
• Nanotechnology
• Foam
• Geopolymer application
• Good to know
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Nano and Advanced Materials Institute Ltd.
• NAMI established in 2006 by Hong Kong government
• Focused on applied research
• Key figures:HK$ 150M+ annual R&D~200 technical talents>HK$ 100M equipment400+ filed patents40,000 ft2 lab area
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Ideas Research
Traditional Research, Development & Implementation Cycle
Bench-top Prototypes
Technology Development�Scale-up�
Manufacturing Refinement
Industry, Startups
Academia, Universities
Applied R&D Centres
Applied Research Eco-system
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Cultivate research TalentContribute to HK’s Technology advancement
Collaborate with industries for Commercialization
Nano and Advanced Materials Institute Ltd.
MISSION
R&D MODEL
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ConstructionEnvironment
Energy
Electronics
Healthcare
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Nano and Advanced Materials Institute Ltd.
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History of Nanotechnology
Lycurgus cup 4th CenturyBritish Museum, London
Gold Colloid, Faraday, 1857Royal Institute of Science, London
Richard Feynman, “There’s Plenty of Room at the Bottom” American
Physical Society meeting at Caltech,1959
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Key Concepts
1 mm1,000,000 nm
6 mm2
6x1012 nm2
100 nmSurface area of one 100 nm cube= 60,000 nm2
1 mm particle is divided into 1,000,000,000,000 cubes
60,000 mm2
0.06 m2
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Key Concepts
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Key Concepts
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Nanoparticles in Geopolymer
ü nano-SiO2ü nano-Al2O3ü nano-clay
• Strength• Density• Water resistance
• Thermal conductivity• Electrical conductivity• Load transfer
ü Carbon nanotubeü Graphene oxide
• Retarding effect• Photocatalytic• Antibacterial
ü Carbon nanotubeü Graphene oxideü TiO2ü nano-Ag
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Go to menti.com and use code: 10 48 93
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FOAM
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Energy-saving construction
Special applicationsMotivation
Environmental protection
Civil Engineering
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Cement paste
Foam
Commercial Foam
Ultra-stable Foam
Challenge
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Solution
Market available product NAMI’s NANOFOAM
450 kg/m3 0.4 MPa 450 kg/m3 2.5 MPaLarge pore size, >500 um Small pore size, 65 um
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Modified nanomaterials assemble at the pore surface
SEM, TEM and TOF-SIMS analysis
Self-assembly of Nanoparticles
Nanoparticles are part of cement matrix after hydration
Solution
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Business caseGeopolymerGypsum
Gypsum Material Geopolymer Nanoparticle foam
900 Density (kg/m3) 700
5-8 MPa Compressive strength (MPa) 8 MPa
No Water resistance Yes
0.2 W/mK Thermal conductivity 0.14 W/mKStudio City – Macau approximate indoor
wall area 140,000 m2
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Foams in Geopolymer
H2O2 Al-powder
Traditional foaming agent
NAMI’s alkaline resistant NANOFOAM
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Raw materials mixing
Foaming agent mixing
Foam pour into paste Foam paste mixing casting Foam geopolymer wall block
Product properties:üEasy to cast, spread diameter 160-180 mm üSmooth surfaceüDensity 700 kg/m3, 8 MPa CSüDensity 900 kg/m3, 17 MPa CS .
Scaling up tests
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Thermal couples on unexposed surface
Video monitoring Unexposed surface after test
Fire resistance test
2 3
45
67
8 1
23
4 5
6 7
81
Exposed surface after test
Block during test
Testing Procedures: BS EN 1364
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Performance
CH1 rise CH2 rise CH3 rise CH4 rise CH5 rise CH6 rise CH7 rise CH8 rise CH 9 rise Average rise
0 60 120 180 240 300 360 4200
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40
60
80
100
120
140
160
180
200
220Initial Temp. :23.0 (deg C)
Max. Temp. rise limit
Tem
pera
ture
rise
(deg
C)
Time/min
Average Temp. rise limit
0
200
400
600
800
1000
1200
Tem
pera
ture
(deg
C)
Before After
1100 kg/m3 foam geopolymer wall block fire test according to BS EN 1364. Specimen size 340mm*190mm*100mm
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5
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Com
pres
sive
stre
ngth
(MP
a)
3d compressive strength 28d compressive strength
Effect of nanoparticle foam in 1300 kg/m3 foam geopolymer
Foam Foam with nanoparticles
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Go to menti.com and use code: 15 41 3
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Conclusions
vFoam geopolymer material has been prepared by using nanoparticle stabilized physical foaming agent.
vDeveloped material has been applied in manufacturing of indoor partition wall blocks with density of 600-1100 kg/m3
vScaling up, mechanical and fire performance has been tested in NAMI
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Working with Nanomaterials
vQuality of bulk materials
vDispersion methods
vSurface charge, pH and surfactants
Dynamic Light Scattering measurement of size distribution of colloidal silica
Zeta potential measurement of alumina
Probe sonicatorRotor-type homogenizer
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NAMIYour Materials Expert
Smart Construction Materials Lab (Center of Excellence) @ Science Park
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