Composite UHPC-AAC/CLC facade elements with modified interior plaster for new buildings and refurbishment. Materials and production technology

Miccoli, Lorenzo; Fontana, Patrick; Silva, Nelson; Klinge, Andrea; Cederqvist, Christer; Kreft, Oliver; Qvaeschning, Dirk; Sjöström, Christer

doi:10.3233/fde-150029

Cited by 16 publications

(14 citation statements)

References 3 publications

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“…In this way, the homogeneity and dense packing of the particles is reliably achieved and the wet mixing process of the UHPC with a standard concrete mixer is simplified significantly ( With the use of a shrinkage-reducing admixture, promising results were obtained. Results on the relationships between dry density, thermal conductivity, and compressive strength were reported previously [12]. In AAC, the thermal conductivity is largely a function of density and moisture content [10].…”

Section: Facade Element Componentsmentioning

confidence: 57%

“…More details of this procedure were reported previously[12].Due to the two-step manufacturing procedure, the UHPC boxes cannot be regarded as monolithic like in the case of the one-step manufacturing. In light of this problem, the production technology focused on a two-step production procedure of the UHPC box with the upturning edges of the box being cast on top of the exterior layer after initial hardening (Figure 2).…”

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confidence: 99%

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UHPC–AAC facade elements: Structural design, production technology, and mechanical behavior

Miccoli¹,

Fontana

Qvaeschning

et al. 2018

ce papers

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The aim of this study was to develop a lightweight composite facade element for new buildings and for the refurbishment of existing facades. These composite elements have been developed combining an insulation layer of autoclaved aerated concrete (AAC) with an external ultrahighperformance concrete (UHPC) supporting layer. This solution allows avoiding the use of connectors and facilitates the production procedure. The structural behavior of the facade elements is mainly influenced by the presence of the upturning edges that are able to increase the stiffness of the element and reduce the thickness of the external layer. The insulation material has no influence on the structural behavior of the UHPC boxes. Flexural tests were carried out to investigate a potential detachment of the external layer from the upturning edge. The photogrammetric analysis used during the flexural tests essentially confirmed that the bond between the two UHPC layers cast in two steps is reliable. The quality of the bond between the external layer and the upturning edge is a key parameter to define the bearing capacity of the element. K E Y W O R D S autoclaved aerated concrete, flexural testing, photogrammetric analysis, production technology, ultrahigh-performance concrete How to cite this article: Miccoli L, Fontana P, Qvaeschning D, Kreft O, Hoppe J, Meng B. UHPC-AAC facade elements: Structural design, production technology, and mechanical behavior.

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Section: Facade Element Componentsmentioning

confidence: 57%

mentioning

confidence: 99%

UHPC–AAC facade elements: Structural design, production technology, and mechanical behavior

Miccoli¹,

Fontana

Qvaeschning

et al. 2018

ce papers

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“…Due to the fact, that the characteristics of many conventional and traditional masonry materials (e.g. fired-clay bricks, concrete or earth-based blocks) are not adequate for achieving good energy performance (Pacheco-Torgal et al 2015), considerable research efforts are currently in progress for upgrading existing masonry systems and for developing innovative energy-efficient walling components (Miccoli et al 2015, Gakiet al 2015, Colombo et al 2014. Up to-date, emphasis has been placed on: (a) developing masonry units with optimized properties and (b) examining the use of parametric design and optimization algorithms for decreasing energy consumption.…”

Section: Review On the Development Of Novel Walling Systemsmentioning

confidence: 99%

Parametric Numerical Assessment of the Energy Efficiency and the Environmental Impact of an Innovative Masonry Construction Component

Kyriakidis

Michael

Illampas³

2016

Journal of Sustainable Architecture and Civil Engineering

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The present study is part of a wider research program, which aims at the development of an innovative masonry construction system that integrates both environmental passive strategies and high energy efficiency. The paper focuses on the parametric computational investigation of the proposed system's basic modular construction component. The thermal performance achieved by alternative geometries of the masonry unit, as well as the use of different constituent materials and insulation fillings, are further examined. The optimum solutions, in terms of thermal performance, were achieved by performing a series of numerical heat flux analyses on alternative proposals, arising from the combination of the above features. Furthermore, the environmental impact, associated with the construction system, is assessed by estimating the total embodied energy of the modular component. It is concluded that the proposed system's thermal performance relies primarily on the characteristics of the constituent mixture composing the modular masonry unit, the geometry of the unit and the use of insulation. In terms of environmental impact, both the constituent mixture used, and the type of insulation material installed, have a considerable impact on the end-product's total embodied energy.

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“…Anchors to transfer vertical and horizontal loads to the load-bearing structure are made of steel. More details are reported in [2]. Figure 2 gives an overview of the geometry of the panels.…”

Section: Façade Element Componentsmentioning

confidence: 99%

Numerical modelling of UHPC and TRC sandwich elements for building envelopes

Miccoli

Johansson

Zandi³

et al. 2015

IABSE Reports

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In this paper a modelling approach is presented to reproduce the mechanical behaviour of sandwich panels via finite element analysis. Two types of panels were investigated in this scope of work. The first sandwich element was a textile reinforced concrete (TRC) panel with cellular lightweight concrete insulation and the second configuration was an ultra-high performances concrete (UHPC) panel with aerated autoclaved concrete insulation. The goal was to obtain a reliable numerical strategy that represents a reasonable compromise in terms of sufficient accuracy of the element characteristics and the computational costs. The results show the possibility of describing the composite action in a full sandwich panel. The achieved modelling approach will later be used for the optimization of TRC and UHPC panels in terms of minimizing the thickness, identifying the number and location of connectors, as well as evaluating varying anchorage systems.

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Composite UHPC-AAC/CLC facade elements with modified interior plaster for new buildings and refurbishment. Materials and production technology

Cited by 16 publications

References 3 publications

UHPC–AAC facade elements: Structural design, production technology, and mechanical behavior

UHPC–AAC facade elements: Structural design, production technology, and mechanical behavior

Parametric Numerical Assessment of the Energy Efficiency and the Environmental Impact of an Innovative Masonry Construction Component

Numerical modelling of UHPC and TRC sandwich elements for building envelopes

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