Meso-Mechanical Modeling of Ultra-Lightweight Concretes

Title: Meso-Mechanical Modeling of Ultra-Lightweight Concretes
Author(s): T. Vallée, M. Oppel, T. Tannert
Paper category : conference
Book title: International RILEM Conference on Material Science
Editor(s): W. Brameshuber
Print-ISBN: 978-2-35158-108-7
e-ISBN: 978-2-35158-109-4
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 83 - 90
Total Pages: 8
Nb references: 20
Language: English

Abstract: Hybrid slab systems combining fibre-reinforced polymer composites together with traditional materials such as concrete or steel are promising load-bearing structures, since each material is optimally used. A novel concept for a hybrid sandwich bridge deck system was proposed by Schaumann et al. (2006) and Keller et al. (2007). The system uses three layers of different materials: an FRP sheet for the bottom skin, lightweight concrete for the core material and ultra high performance fibre-reinforced concrete for the top skin. Different concrete mixtures, involving expanded glass and clay aggregates were analyzed.

The meso-mechanical response of the investigated brittle ultra-lightweight concretes (ULWC) was predicted based on a meso-mechanical numerical analysis backed up by experimental assessment. The approach was based on explicit representation of the main concrete components, including mortar, aggregates, their respective interfaces and eventually fibres. The effort, firstly, focused on numerically reproducing the macroscopic behaviour of concrete specimens, in traction, compression and splitting strength, in order to develop optimum mixtures, secondly on implementing the later result in the context of hybrid slabs.

Online publication: 2010-12-02
Publication type : full_text
Public price (Euros): 0.00

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