Transcript Department for Ceramics and Christian Doppler Laboratory for Building Materials with optimised Properties at the University of Leoben The Department of Ceramics at.

Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
The Department of Ceramics at the University of
Leoben
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
The University of Leoben
1840
„Styrian Corporate School of Mining“ in Vordernberg near
Leoben
1848
Transferred to Leoben
1849
„Imperial and Royal School of Mining“ with initially 48
students
1904
„University of Mining“
1975
„Montanuniversität Leoben“
today:
1 635 students in bachelor/master/diploma programmes
214 students in doctoral programmes
314 students in the first year
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Degree programmes at the University of Leoben
degree programmes
bachelor´s
programmes
master´s
programmes
Applied Geosciences
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1
Industrial Environmental Protection,
Disposal Techniques and Recycling
1
1
Industrial Logistics
1
1
Materials Science
Metallurgy
diploma
programmes
1
1
1
Mechanical Engineering
1
Natural Resources
1
2
Petroleum Engineering
1
2
Plastic Engineering
1
1
3
Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Postgraduate education at the University of Leoben
MBA Generic Management (4 terms)
Quality management in the chemical laboratory
Blasting technology
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
The staff of the department
Federal Employees
Professors
1
University assistents
3
Laboratory assistents
3
Administration
1
Employees financed by third-party funds
Researchers
5
Laboratory assistents
1
Part time employed research assistents in fulltime equivalents
4
total
18
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Participation of the department in education
-
Bachelor´s programme „Natural Resources“
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Master´s programme “Mineral resources: Processing and Materials”
with a branch “Building materials and Ceramics”
Courses of the bachelor´s programme
„Natural Resources“
SH
ECTS
building materials 1
3
3,75
binders 1
1
1,25
introduction to ceramics
2
2,5
laboratory exercise in building materials and
ceramics 1
2
2
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Courses of the master´s programme “Mineral resources: Processing and
Materials” , branch “Building materials and Ceramics” which are organized by
the department of ceramics
courses
SH
ECTS
Building materials 2
2
2,5
Binders 2
2
3
Basic refractory materials
2
3
Plant design and process technology for the production of
building materials
2
2
Laboratory exercise in building materials and ceramics 2
2
2
Fundamentals of building materials and ceramics
3
3,75
Non-basic refractory materials
2
3
Damage and restoration of construction
2
2
Modeling and simulation in building materials technology
3
3,75
Testing methods and application of building materials
2
2,5
Glass science and technology
2
3
Laboratory exercise in building materials and ceramics 3
2
2
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Research projects at the department for ceramics
1.
Research projects of the Christian Doppler Laboratory for
Building Materials with Optimized Properties
The laboratory was founded in 1999
The main research interests are:
Increase of knowledge of the especially mechanical behaviour of
refractive and non refractive building materials
- characterisation of the material behaviour
- influences on the material behaviour
- prediction of the material behaviour (modeling and simulation)
- investigation and avoidance of failure
Successful scientific evaluations have been performed on 16.2.2001
und 19.3.2004 (evaluator Prof. Schlegel/Freiberg)
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Modules:
1.
2.
3.
4.
Mechanical and thermomechanical characterisation of building
materials at room temperature and at elevated temperatures
Prediction of the mechanical and thermomechanical behaviour of
refractories
Fundamentals for the development of refractories with reduced
brittleness
Auxiliary materials for continuous casting
Industriepartner:
RHI AG, VA-SD GmbH, VA-SL GmbH
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Research projects at the department for ceramics
2.
3.
KnetMet reserach project „ Modeling of the stresses in
refractories and in furnace linings with the help of FEM“
-
Investigation of the thermomechanical behaviour of a BOF lining
and optimisation of the design of the bottom/wall transition zone
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thermomechanical behaviour and thermal shock of a metering
nozzle at the start of casting
-
thermoshock behaviour of a ladle shroud
Further projects in the fields of applied fundamentals of
refractory technology
-
Fundamentals of the development of refractories with optimised
thermomechanical properties
-
Fundamental investigations of refractory corrosion
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Research projects at the department for ceramics
4.
Investigation of failure of thermal insulation composite
systems
Goal of these investigations is the determination of failure mechanisms, the
conditions for failure and methods to avoid it.
5.
Other current research projects
Various research activities especially togehter with partners from industry,
e.g. failure analysis of building materials and refractories, investigation of
the microstructure of ceramics, etc.
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Examples for research projects at the department for ceramics
Simulation of the thermomechanical behaviour of Refractories:
Finished projects:
Problems associated with modelling and
simulation of furnace linings
• Teeming ladle
• Steel converter (AOD, LD)
• Material properties
• Blast furnace
• changing material properties f(T,t)
• Torpedo ladle
• creep
• RH - degasser
• different material behaviour under
compression and tension
Ongoing projects:
• Complexity of the models
• Tundish
• Modelling of joints
• Wedge splitting test
• Changing loads
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Thermomechanical behaviour of a metering nozzle
Temperature distribution and stresses in axial direction:
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Thermomechanical behaviour of a metering nozzle
Initiation and propagation/opening of cracks:
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Some material laws applied for thermomechanical modelling of refarctories
Fictitious crack model according to Hillerborg
Plastic failure criterion of Drucker-Prager
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Evaluation of a wedge splitting test to determine strain softening law
800
Fmax
700
Force Fv [N]
600
500
400
wedge splitting
test according to
Tschegg
c
300
G
Gff‘
200
Input:
0,15 Fmax
100
Output:
geometry
F/ diagram
Gf, ft, E
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
Displacement v [mm]
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Displacement measurement techniques for room temperature
and for elevated temperatures
inductive displacement measurement system,
here applied for a wedge splitting test at room
temperature
The laser speckle
extensometer is a
measuring system
suitable
for small
displacements at
elevated
temperatures
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Determination of Young´s modulus at elevated temperatures with
a resonant frequency technique
100
90
1
80
70
2
E [GPa]
60
3
50
4
40
30
20
10
0
0
200
400
600
800
T [°C]
1000
1200
1400
1600
The figures show a furnce suitable for measurements up to
1550°C and results for four carbon bonded refractories.
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Fractographic investigations
1 ,0
0 ,8
ACF
0 ,6
0 ,4
1 /e
0 ,2
0 ,0
-0 ,2
0
 1
2
3
4
5
6
7
8
9
10
k [m m ]
The figures show the experimental setup to investigate fracture surfaces
(three dimensional informations from video images) and the
autocorrelation function for the fracture surface of a refractory material.
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Investigation of mould powders and continuous casting slags

grain size analysis
DTA /(uV/mg)
Temperatur /°C
TG /%
¯ Exo
100
1400
0.10
1200
98
0.05
1000
96

thermochemical analysis in air as well as
under reducing conditions (CO/CO2)
0
800
94
-0.05
600
92
-0.10

differential scanning calorimetry

thermogravimetry
400
90
-0.15
200
88
-0.20
0
Gerät:
Datei:
Projekt:
Versuchs-ID:
Datum/Zeit:
Labor:
Operator:
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NETZSCH STA 409C
5404_1400_041104.dss
Modul 5
E5404_5K_10K
04.11.04 08:48:15
GHI
Ki

heating microscopy

thermal treatment up to 1250°C in air as well as under
reducing conditions (CO/CO2)
100
150
Probe:
Referenz:
Material:
Korrektur-Datei:
Tempka.l - Empfd. Datei:
Bereich:
Probentr./TC:
200
Zeit /Min
250
Basislinie, 5K, 10K, 126.600 mg
keine,0.000 mg
Pt-Tiegel
BL_1400_041103_1.bss
Tcalzero.tcx / Senszero.exx
25 °C....1400 °C/-10....5K/min
DTA(/TG) HIGH RG 2 / S
300
Modus /Messart.:
Segmente:
Tiegel:
Atmosphäre:
TG Korr/Messber:
DSC Korr/Messber:
Bemerkung:
350
400
DTA-TG / Probe + Korrektur
1-3/3
DTA/TG crucible Pt
Luft synth./40 / Luft synth./80
020/500 mg
020/500 uV
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Investigation of mould powders and continuous casting slags

chemical-mineralogical investigation of original and thermally treated specimens

chemical analysis

X-ray diffraction analysis

light microscopy

scanning electron microscopy

electron probe microanalysis
350°C

high temperature microscopy

high temperature viscosimetry
900°C
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Failure Analysis of External Thermal Insulation Composite Systems
(ETICS)
Typical defects found on façades are cracks along joints of used insulation
material, delaminations of rendering and bending of insulation elements.
masonry
distorted insulation
boards
failure of an about 2 year old façade system
schematic cross section
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Failure Analysis of External Thermal Insulation Composite Systems
(ETICS)
Fundamental properties for thin layers of rendering materials have to be determined prior to
numerical simulation. A modified wedge splitting procedure according to Tschegg has been
carried out for this purpose to characterise adherence and fracture.
displacement
force in horizontal direction [N]
1000
900
A-DP
800
B-DP
700
C-DP
600
D-DP
500
E-DP
400
300
200
100
0
0
0.5
1
1.5
2
2.5
3
3.5
displacement [mm]
modified wedge splitting procedure
load/displacement curves of rendering materials
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Department for Ceramics and Christian Doppler Laboratory for
Building Materials with optimised Properties at the University of
Leoben
Failure Analysis of External Thermal Insulation Composite Systems
(ETICS)
Deformation of ETICS due to shrinkage of the insulation material,
superimposed by cyclic changes in temperature.
qualitative view of four mounted
insulation boards (increasing
displacements from blue to red)
For temperature cycles of 30°C, the maximum relative displacement of two adjacent edges
of the insulation boards is app. 0.15 mm. In this calculation fixation dowels are located on the
edges and centre of the insulation boards.
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