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Strength. Performance. Passion.
© 2018
Textilbeton für die Anforderungen der
Zukunft
Aurelio Muttoni, Prof. Dr., EPFL
Holcim Betontagung 2018, ETH, Zürich
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© 2018
The Genoa viaduct accident
Holcim Betontagung 2018, ETH, Zürich 2
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© 2018
Introduction: Why TRC?
Concrete shell in
Chiasso,
Switzerland,
2007-2010
Holcim Betontagung 2018, ETH, Zürich 3
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© 2018
Introduction: Why TRC?
Concrete shell in
Chiasso,
Switzerland,
2007-2010
Holcim Betontagung 2018, ETH, Zürich 4
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© 2018
Introduction: Why TRC?
Concrete shell in
Chiasso,
Switzerland,
2007-2010
Holcim Betontagung 2018, ETH, Zürich 5
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© 2018
Introduction: Why TRC?
Concrete shell in
Chiasso,
Switzerland,
2007-2010
Holcim Betontagung 2018, ETH, Zürich 6
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© 2018
Introduction: Why TRC?
Concrete shell in
Chiasso,
Switzerland,
2007-2010
Holcim Betontagung 2018, ETH, Zürich 7
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© 2018
Introduction: Why TRC?
SIA 262:2013
Holcim Betontagung 2018, ETH, Zürich 8
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© 2018
Introduction: Why TRC? What is TRC?
TRC: high strength fabrics embed in fine grained high
performance mortar
• Textile fabrics allow for tailoring of the reinforcement
according
to structural design
• Non corrosive reinforcements allow to significantly reduce
concrete cover (only static requirements)
Holcim Betontagung 2018, ETH, Zürich 9
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© 2018
Introduction: Why TRC? What is TRC?
Building in a lighter and more sustainable manner:
textile reinforced concrete for thin structural elements
Cemsuisse project 201407
Holcim Betontagung 2018, ETH, Zürich 10
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© 2018
Materials: Reinforcement
2D-grid
3D-cage
Holcim Betontagung 2018, ETH, Zürich 11
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© 2018
Materials: Reinforcement
GLASS CARBON ARAMID BASALT
+ Non corrosive cnom ≈ 2mm + Environmental friendly high
performance mortars low clinker content cement + High strength fRov
≈ 2000 MPa (4 x B500) + Semi flexible bidirectional grid double
curved structures
Holcim Betontagung 2018, ETH, Zürich 12
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© 2018
Materials: Reinforcement
Holcim Betontagung 2018, ETH, Zürich 13
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© 2018
Materials: Reinforcement
Holcim Betontagung 2018, ETH, Zürich 14
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© 2018
Materials: Reinforcement
fc = 120 MPa fct = 4 MPa Ec = 31 GPa
High performance mortar provided by cemsuisse (Holcim):
Compressive & tensile characterization (50+ test)
Holcim Betontagung 2018, ETH, Zürich 15
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© 2018
Materials: Bond
Holcim Betontagung 2018, ETH, Zürich 16
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© 2018
Structural response: Tension
Holcim Betontagung 2018, ETH, Zürich 17
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© 2018
Structural response: Tension
ARov∙ ηE∙ ERov
ARov∙ERov
ε = ΔL/L0 [%]
F [kN
]
Carbon
Fabric
uncoated coated impregnated
ηE 0.40 – 0.90 0.75 – 0.95 0.80 – 1.00
ηf 0.60 – 1.00 0.80 – 1.00 0.90 – 1.00
ARov∙fRov
ARov∙ ηf ∙ fRov
1
1
Embedded textile
naked
textile
Holcim Betontagung 2018, ETH, Zürich 18
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© 2018
Potential applications
Holcim Betontagung 2018, ETH, Zürich 19
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© 2018
Potential applications
Holcim Betontagung 2018, ETH, Zürich 20
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© 2018
Potential applications
Holcim Betontagung 2018, ETH, Zürich 21
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© 2018
Potential applications
• Exploration of min design thickness:
construction of elements with
tmax = 10mm
• Combination of fabric with GFRP
concentrated reinforcement (bars)
Holcim Betontagung 2018, ETH, Zürich 22
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© 2018
Potential applications
Beam
Slab
Holcim Betontagung 2018, ETH, Zürich 23
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© 2018
Potential applications
Beam
BV1
δult = 16mm, L = 2.55m
Slab
δult = 81mm, L = 2.00m
Holcim Betontagung 2018, ETH, Zürich 24
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© 2018
Potential applications
Alphashell prototype fon an airtight tube for MagLev Design
thickness tmax = 20mm for D = 1.5m 6 Layers of carbon fabric
reinforcement
Holcim Betontagung 2018, ETH, Zürich 25
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© 2018
Conclusions
Textile reinforced concrete is a promising material for light
and sustainable structures
Several textile fabrics are currently available. Their
suitability for different applications needs to be considered
carefully
New design methods accounting for the relatively brittle
behaviour of the material need still to be developed
The behaviour of the textile reinforcement embedded in mortar is
quite different compared to the material behaviour. This shall
carefully be accounted for and material characteristics provided by
suppliers should be used with caution
Holcim Betontagung 2018, ETH, Zürich 26
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© 2018
The accident of the Morandi Bridge in Genoa
Holcim Betontagung 2018, ETH, Zürich 27
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© 2018
The accident of the Morandi Bridge in Genoa
The accident is due to poor design?
The accident is due to poor maintenance?
Such an accident cannot occur in Switzerland?
The durability of concrete bridges is not sufficient?
Holcim Betontagung 2018, ETH, Zürich 28
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© 2018
What do we know? Some facts
Holcim Betontagung 2018, ETH, Zürich 29
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© 2018
The accident is due to poor design?
Tempul aqueduct, Spain, 1925-1927, L=60 m, Eduardo Torroja
Pont de Donzère-Mondragon - Pierrelatte, France, L=81 m, 1952,
Albert
Caquot
Strömsund Bridge, Sweden, 1955-1956, L=182 m, Franz
Dischinger
Maracaibo Bridge, Venezuela, 1957-1962, L=235 m, Riccardo
Morandi
Holcim Betontagung 2018, ETH, Zürich 30
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© 2018
The accident is due to poor design?
Polcevera viaduc, Italy, 1960-1964, L=209 m, Riccardo
Morandi
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Pont de Normandie, France, 1990-1995, L=856 m
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Russky Bridge, Vladivostok, Russia, 2009-2012, L=1’104m
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Holcim Betontagung 2018, ETH, Zürich 31
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© 2018
The accident is due to poor design?
Citroën DS, 1955-1975
Alfa Romeo Giulia Spider, 1955-1962
Holcim Betontagung 2018, ETH, Zürich 32
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© 2018
The accident of the Morandi Bridge in Genoa
The accident is due to poor design?
The accident is due to poor maintenance?
Such an accident cannot occur in Switzerland?
The durability of concrete bridges is not sufficient?
Holcim Betontagung 2018, ETH, Zürich 33
