Swiss Re Ag · SIX:SREN
Swiss Re — Investor Presentation (October 2022)
23 slides from Swiss Re's investor presentation, Oct 5, 2022
Slide 1: Concrete: Trends, Opportunities and Risks
Concrete: Trends, Opportunities and Risks Pascal Schappes - October 5th, 2022 1
Slide 2: Definition – What is concrete?
Definition – What is concrete? • Concrete is a building material generally made of broken stone, gravel, sand, cement, water and usually adhesives • Concrete hardening is caused through a chemical reaction named hydration • Earliest recordings date back to 6500BC, potentially invented by the Egyptia
Slide 3: Great Wall of China (220 BC)
Great Wall of China (220 BC) Pascal Schappes | October 2022 | Risk Engineering Services 3
Slide 4: Colosseum, Rome (80 AD)
Colosseum, Rome (80 AD) Pascal Schappes | October 2022 | Risk Engineering Services 4
Slide 5: Pantheon, Rome (126 AD)
Pantheon, Rome (126 AD) Pascal Schappes | October 2022 | Risk Engineering Services 5
Slide 6: Where is concrete inevitable or potentially without alternative?
Where is concrete inevitable or potentially without alternative? • Foundations e. g. baseplate, deep foundations • Retention walls for excavation pits e. g. slurry walls, secant bored pile wall • Tunnels e. g. shotcrete, tubbing rings • High-span bridges (depending on location and geometry, structur
Slide 7: Hoover Dam and Mike O'Callaghan–Pat Tillman Memorial Bridge
Hoover Dam (1936) and Mike O'Callaghan –Pat Tillman Memorial Bridge (2010) Pascal Schappes | October 2022 | Risk Engineering Services 7
Slide 8: DC Tower (2013)
DC Tower 1 (2013) Pascal Schappes | October 2022 | Risk Engineering Services 8
Slide 9: DC Tower: retention walls, deep foundations, baseplate
DC Tower 1 (2013) Retention walls Deep foundations Baseplate Pascal Schappes | October 2022 | Risk Engineering Services 9
Slide 10: Loss examples: Genova Morandi Bridge, Italy
Loss examples Genova Morandi Bridge, Italy • Structural system of a cable-stayed bridge • Failure of one of the pre-stressed major tension beams, causing a chain reaction • Supposed root cause: complex maintenance due to unique design Source: eurotopics.net Pascal Schappes | October 2022 | Risk Engi
Slide 11: Loss examples: Chirajara Bridge Collapse, Colombia
Loss examples Chirajara Bridge Collapse, Colombia • Failure of horizontal pre-stressed concrete beam in one of the main pillars • Supposed root cause: potentially design failure Source: bbc.com Source: bbc.com Pascal Schappes | October 2022 | Risk Engineering Services 11
Slide 12: Loss examples: Miami Surfside Condominium Collapse
Loss examples Miami Surfside Condominium Collapse • Failure in a single element results in the failure of adjoining structural elements, which in turn lead to the failure of additional structural elements • Supposed root cause: lack of maintenance Source: www.architectsjournal.co.uk Source: abcnews.
Slide 13: Advantages of concrete
Advantages of concrete • Strength Concrete with a compressive strength of more than 100 N/mm² is available on the market • Flexibility Concrete can be poured into nearly every imaginable shape • Reliability Being an artificial product (made of mainly natural ingredients), concrete is consistent and
Slide 14: Disadvantages of concrete
Disadvantages of concrete Disadvantages from a technical standpoint: • Concrete is prone to environmental influences, e. g. chlorides • With approx. 2,5 – 2,8 to/m³, concrete must be considered heavy Disadvantages from a sustainability standpoint • CO2-footprint (clinker production, 1to CO2 for 1to
Slide 15: Trends and opportunities (1)
Trends and opportunities (1) Following the three principles of sustainability can help to decrease the environmental impact of concrete: • Reduce – see next slides • Reuse – e. g. refurbishment of an existing concrete structure/ building • Recycle – see next slides Pascal Schappes | October 2022 | R
Slide 16: Trends and opportunities (2)
Trends and opportunities (2) • Recycling (recycle) – using concrete from dismantled/demolished concrete structures • Increase of lifespan (reduce) – cathodic protection against corrosion – use of bacteria to heal cracks (self-healing concrete) – use alternative material like basalt fibers (better su
Slide 17: Trends and opportunities (3)
Trends and opportunities (3) • Reduction of reinforcements and other non-renewable materials (reduce) – use of 3D-printing (only for small buildings at the moment) to reduce amount of reinforcement steel and formwork material – replacement of reinforcement steel by carbon fibers (nature-friendly, re
Slide 18: Risks (1)
Risks (1) • Recycling of concrete – Recycled aggregate concrete shows an increased cracking risk compared to standard aggregates. – In the past, use of recycled aggregate concrete should not exceed 25-35%. Today a share of 80% is possible under certain circumstances • Cathodic protection against cor
Slide 19: Risks (2)
Risks (2) • Basalt fibers – negative impact on workability – more expensive than steel reinforcements – breakable and low in withstanding bending force – lack of specific design guidance • Use of supplementary cementitious materials (SCMs) – slower production – reduced strength – reduced freeze–thaw
Slide 20: Concrete – Conclusions
Concrete – Conclusions Concrete will remain the most relevant building material in the future. Therefore, it is essential to keep up our efforts in finding new ways to make concrete more sustainable. 20
Slide 21: Thank you!
Thank you! Contact us Follow us Pascal Schappes Marc Schmassmann Senior Risk Engineer Senior Risk Engineer [email protected] [email protected] +49 89 3844 1599 +41 43 285 27 24 21
Slide 22: Pascal Schappes | October 2022 | Risk Engineering Services
Pascal Schappes | October 2022 | Risk Engineering Services 22
Slide 23: Legal notice
Legal notice ©2022 Swiss Re. All rights reserved. You may use this presentation for private or internal purposes but note that any copyright or other proprietary notices must not be removed. You are not permitted to create any modifications or derivative works of this presentation, or to use it for