Abstract
Light concrete structures offer solutions to many of the urgent problems builders and structural engineers are facing today. The small weight means less consumption of resources and possibilities of making longer spans. The open microstructure makes it fire-resistant and creates a sound damping effect. In addition, it is capable of regulating moisture content of enclosures. You may cast light concrete structures in textile moulds made with a minimum of materials in many spectacular shapes, since the pressure on the mould is small.
Super-light structures and sandwich structures use light concrete to fill out the space between stronger concrete parts, so that the light concrete can stabilize the strong and protect it from fire. Light concrete has a smaller E-modulus than the strong, and thereby the engineer can guide forces to follow an optimized path via the strong concrete parts. This means that the engineer decides where the forces should be in the structure. This is the opposite of the traditional approach, where the structure determines what the engineer must do, because the engineer should first find the path of the forces, before assessing the load-bearing capacity.
Super-light prefabricated SL-deck elements offer a large flexibility regarding shape and holes for pipes and implemented services as floor heating, sewers, water and electricity.
The combination of strong and light concrete makes it possible to establish a sound insulationwith amaterial consumption of only three-fourth of what is elsewise required.
Prefabricated light floor systems allow beamless solutions with larger spans for offices, industry and car parks.
You may also utilize the super-light principle with combined application of light and strong concrete for creating tunnels and especially floating tunnels.
Another specific application is for shipbuilding, where the lightness of the structure improves manoeuvrability and reduces costs and resource demands compared to traditional concrete ships.
With pearl-chain technology, you can create curved shapes from simple flat massproduced slab elements, which are easy and cheap to cast and transport to the erection site. This can reintroduce arches and vaults,which elsewise have become too difficultand costly to build.
Our new research in the lightest concrete qualities of densities down to about fifty kilogram per cubic metre has developed materials with insulating properties equalto mineral wool that can be cast out to fit anywhere.
Finally, modern builders and engineers are concerned about the impact on the climate.
They want to reduce the CO2 emission from material production and building processes.
The reduced weight of super-light structures means less consumes of cement and aggregates, and in addition, we can now produce cement with less pollution and a smaller CO2 impact. These numbers depend on who are producing the materials and how. However, the durability and long lifetime of the structures make them sustainable and in many cases more sustainable than, e.g., structures in wood. It is not new to apply light concrete structures. Roman builders developed remarkably skills creating them. Roman concrete structures and technology represent a source of inspiration for modern builders and engineers. Their ideas and detailing have proved to be applicable in full scale and just wait for being reintroduced in combination with modern building technology. Super-light structures can be seen as examples of that.We therefore introduce the ancient light concrete structures in this book based on intensive studies on the subject. The authors have written the present book in order to present the many technologies and detailed solutions available for light and super-light concrete structures. It is the intention that the book can serve as a design guide, a reference and a textbook for teaching the subject. In addition, the book is intended to serve as a source of inspiration for consulting engineers, architects and others interested in the subject and in creating a sustainable future.
Super-light structures and sandwich structures use light concrete to fill out the space between stronger concrete parts, so that the light concrete can stabilize the strong and protect it from fire. Light concrete has a smaller E-modulus than the strong, and thereby the engineer can guide forces to follow an optimized path via the strong concrete parts. This means that the engineer decides where the forces should be in the structure. This is the opposite of the traditional approach, where the structure determines what the engineer must do, because the engineer should first find the path of the forces, before assessing the load-bearing capacity.
Super-light prefabricated SL-deck elements offer a large flexibility regarding shape and holes for pipes and implemented services as floor heating, sewers, water and electricity.
The combination of strong and light concrete makes it possible to establish a sound insulationwith amaterial consumption of only three-fourth of what is elsewise required.
Prefabricated light floor systems allow beamless solutions with larger spans for offices, industry and car parks.
You may also utilize the super-light principle with combined application of light and strong concrete for creating tunnels and especially floating tunnels.
Another specific application is for shipbuilding, where the lightness of the structure improves manoeuvrability and reduces costs and resource demands compared to traditional concrete ships.
With pearl-chain technology, you can create curved shapes from simple flat massproduced slab elements, which are easy and cheap to cast and transport to the erection site. This can reintroduce arches and vaults,which elsewise have become too difficultand costly to build.
Our new research in the lightest concrete qualities of densities down to about fifty kilogram per cubic metre has developed materials with insulating properties equalto mineral wool that can be cast out to fit anywhere.
Finally, modern builders and engineers are concerned about the impact on the climate.
They want to reduce the CO2 emission from material production and building processes.
The reduced weight of super-light structures means less consumes of cement and aggregates, and in addition, we can now produce cement with less pollution and a smaller CO2 impact. These numbers depend on who are producing the materials and how. However, the durability and long lifetime of the structures make them sustainable and in many cases more sustainable than, e.g., structures in wood. It is not new to apply light concrete structures. Roman builders developed remarkably skills creating them. Roman concrete structures and technology represent a source of inspiration for modern builders and engineers. Their ideas and detailing have proved to be applicable in full scale and just wait for being reintroduced in combination with modern building technology. Super-light structures can be seen as examples of that.We therefore introduce the ancient light concrete structures in this book based on intensive studies on the subject. The authors have written the present book in order to present the many technologies and detailed solutions available for light and super-light concrete structures. It is the intention that the book can serve as a design guide, a reference and a textbook for teaching the subject. In addition, the book is intended to serve as a source of inspiration for consulting engineers, architects and others interested in the subject and in creating a sustainable future.
| Original language | English |
|---|
| Publisher | Springer |
|---|---|
| Number of pages | 205 |
| ISBN (Print) | 978-3-030-80499-2 |
| ISBN (Electronic) | 978-3-030-80500-5 |
| DOIs | |
| Publication status | Published - 2022 |
| Series | Springer Tracts in Civil Engineering |
|---|---|
| ISSN | 2366-259X |