Lightweight FRC infill wall: in-plane and out-of-plane loading tests
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ORIGINAL ARTICLE
Lightweight FRC infill wall: in-plane and out-of-plane loading tests Adriano Reggia
. Alessandro Morbi . Marco Preti . Giovanni A. Plizzari
Received: 1 October 2019 / Accepted: 9 October 2020 The Author(s) 2020
Abstract The continued interest in technological innovation in construction has greatly broadened the horizons of material science, developing a specific sector closely related to the recycling of waste products. This paper examines the thermal, mechanical and structural behaviour of an insulating light weight fibre reinforced concrete (ILWFRC), which is made by replacing natural sand and gravel with artificial aggregates resulting from the process of glass recycling. ILWFRC offers low density (approximately 650 kg/m3), excellent thermal characteristics (thermal conductivity 0.1 W/mK), a compressive strength similar to brick masonry (3.5 MPa) with low cement content (265 kg/m3) and stable postcracking behaviour. The mechanical and physical properties of ILWFRC were employed for the construction of a full-scale infill wall (having dimensions of 2.9 9 2.6 9 0.2 m), which was experimentally studied under in-plane and out-of-plane actions. Inplane response showed a maximum lateral load of 359 kN at 1.5% drift, with a residual capacity of more than 75% at 4% drift. The subsequent out-of-plane test A. Reggia (&) M. Preti G. A. Plizzari Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, Via Branze, 43, 25123 Brescia, Italy e-mail: [email protected] A. Morbi Global Product Innovation, Heidelberg Cement Group, Bergamo, Italy
was performed up to failure with a maximum lateral load of 67 kN, corresponding to about 7 times the infill self-weight. Keywords Artificial aggregates Circular economy Fibre reinforced concrete Infill wall Performance levels Insulating concrete Recycling Quasi-static cyclic response
1 Research significance In order to address the challenges of Directive 2002/ 91/EC on the energy performance of buildings [1] and of Directive 2008/98/EC on waste [2], several new construction materials have been developed over the years. Among these, and the focus of this article, is an innovative material, called insulating light-weight fibre reinforced concrete (ILWFRC). This new cement-based material is characterised by a reduced unit weight and excellent thermal and mechanical characteristics, due to the presence of 70% (by volume) lightweight recycled glass aggregates (patented by [3]) and synthetic fibres. These characteristics make it suitable for use in large structural and non-structural elements which are subject to moderate compressive stresses, such as load-bearing walls, partitions and infill walls. In this paper, an ILWFRC infill prototype is investigated. The characteristics of
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the material allow the accomplishment of thermal performance limits imposed by national codes with a single layer of material, avoiding the use of additional in
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