Infraleichtbeton: Reif für die Praxis

Schlaich, Markus P.; Hückler, Alex

doi:10.1002/best.201700046

Cited by 21 publications

(14 citation statements)

References 7 publications

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“…(b) flexibility, since one single layer provides both bearing and insulation, no need for plastering or cladding is required and it can be cast in situ or as a precast element and (c) sustainability that is gained by such a monolithic structure with easy maintenance, recycling ability and energy saving. In this context, 50 cm wall thickness has been proven by many researchers to meet the insulation criteria and to provide a sufficient bearing resistance [13,14,18,19,22].…”

Section: Infra Lightweight Concretementioning

confidence: 99%

“…Important also is the high rate of carbonization of ILC due to its high level of porosity. ILC has a much higher carbonization coefficient than NWC; it can absorb back about 55 kg of CO 2 per cubic meter during its service life [19]. Consequently, ILC represents a relatively eco‐friendly concrete material.…”

Section: Bindermentioning

confidence: 99%

“…Therefore, it can be utilized in robust, durable and straightforward constructions. In comparison to the currently common multilayer wall constructions, these potentials make it a competitive alternative in respect of conceptual design, insulation, ease of construction, fire protection, energy saving and recyclability [18,19].…”

Section: Introductionmentioning

confidence: 99%

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Infra lightweight concrete: A decade of investigation (a review)

Elshahawi

Hückler

Schlaich

2020

Structural Concrete

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Around a decade ago, the first realistic mix of infra lightweight concrete (ILC) was developed and used in the construction of the façades of a family house in Berlin. Since then, it has been demonstrated that ILC represents a promising lightweight concrete material of dry density less than 800 kg/m3 and possesses both good thermal insulation characteristics and a sufficient load bearing resistance. Such a unique combination makes it a competitive alternative to the conventional multilayer façades common nowadays in terms of robustness, durability, energy saving and ease of construction. In addition, it opens up innovative architectural horizons. The chief aim of this review is to present the current state of knowledge and the development of ILC over the last decade. A further and equally important consideration is to shed light on scientific gaps and issues that require additional investigation. Accordingly, wide comparisons between numerous mixes as to ingredients, density, strength and thermal conductivity are conducted. The review shows how the mechanical and thermal properties of ILC have improved considerably over time. It also reveals, however, how the understanding of the structural behavior of ILC could be improved through further discussions.

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Section: Infra Lightweight Concretementioning

confidence: 99%

Section: Bindermentioning

confidence: 99%

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Infra lightweight concrete: A decade of investigation (a review)

Elshahawi

Hückler

Schlaich

2020

Structural Concrete

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“…Some ILC exhibit a dry concrete density below 800 kg/m 3 and thus are no longer covered by existing LC standards [48]. Schlaich and his co-workers (Technical University Berlin, Germany) have extrapolated the application rules for LC below the existing limits for strength values and densities in DIN EN 1992 and established design rules for infra-lightweight concretes (ILC) [137][138][139].…”

Section: Extending the Application Area Of Ilcmentioning

confidence: 99%

Lightweight Concrete—From Basics to Innovations

2020

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Lightweight concrete has a history of more than two-thousand years and its technical development is still proceeding. This review starts with a retrospective that gives an idea of the wide range of applications covered by lightweight concrete during the last century. Although lightweight concrete is well known and has proven its technical potential in a wide range of applications over the past decades, there are still hesitations and uncertainties in practice. For that reason, lightweight aggregate properties and the various types of lightweight concrete are discussed in detail with a special focus on current standards. The review is based on a background of 25 years of practical and theoretical experience in this field. One of the main challenges in designing lightweight concrete is to adapt most of design, production and execution rules since they often deviate from normal weight concrete. Therefore, aspects are highlighted that often are the cause of misunderstandings, such as nomenclature or the informational value of certain tests. Frequently occurring problems regarding the mix design and production of lightweight concrete are addressed and the unintended consequences are described. A critical view is provided on some information given in existing European concrete standards regarding the mechanical properties of structural lightweight concrete. Finally, the latest stage of development of very light lightweight concretes is presented. Infra-lightweight concrete is introduced as an innovative approach for further extending the range of applications of lightweight concrete by providing background knowledge and experiences from case records.

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“…Infra‐Lightweight Concrete has been investigated at the Chair of Conceptual and Structural Design, Technische Universität Berlin (TU Berlin), for more than 10 years 2,3 . It stands out from insulating concretes due to an exceptional combination of low density, hence good insulation properties, and comparatively good compressive strength.…”

Section: Introductionmentioning

confidence: 99%

Structural behavior of multifunctional inhomogeneous infra‐lightweight concrete elements

Lösch

Schlaich

2020

Structural Concrete

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The reduction of energy and resources consumption in the building sector is of crucial importance. One way to approach this challenge is the development of high‐performance materials to increase efficiency. In the research project “MultiLC” (Multifunctional lightweight concrete elements with inhomogeneous properties) highly efficient Infra‐Lightweight Concrete (ILC) elements with varying properties over the cross‐section and further functions, for example, active thermal insulation or photocatalytic air purification, were developed. Besides investigations in concrete technology and building physics, the structural behavior of inhomogeneous ILC‐elements was examined. This paper summarizes the analytical and experimental methods used to investigate the structural behavior of wall and beam specimens and wall‐to‐slab connections. It was found that the stiffness method is a reasonable approach to calculate the maximum load‐bearing capacity of the inhomogeneous ILC elements. Recommendations could be formulated for ultimate design values. Also, the feasibility of a fixed connection between a normal concrete slab and a multi‐layered ILC‐wall was shown.

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Infraleichtbeton: Reif für die Praxis

Cited by 21 publications

References 7 publications

Infra lightweight concrete: A decade of investigation (a review)

Infra lightweight concrete: A decade of investigation (a review)

Lightweight Concrete—From Basics to Innovations

Structural behavior of multifunctional inhomogeneous infra‐lightweight concrete elements

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