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Advances in Concrete Construction Volume 10, Number 6, December 2020 , pages 547-557 DOI: https://doi.org/10.12989/acc.2020.10.6.547 |
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Long-term monitoring of a hybrid SFRC slab on grade using recycled tyre steel fibres |
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Ana Baricevic, Martina Grubor, Rinaldo Paar, Panos Papastergiou, Kypros Pilakoutas and Maurizio Guadagnini
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| Abstract | ||
| This paper presents one of the demonstration projects undertaken during the FP7 EU-funded Anagennisi project (Innovative reuse of all tyre components in concrete-2014-2017) on a full-scale (30 mx40 m, thickness: 0.2 m) Steel Fibre Reinforced Concrete (SFRC) slab-on-grade using a blend of manufactured steel fibres (MSF) and Recycled Tyre Steel Fibres (RTSF). The aim of the project was to assess the use of RTSF in everyday construction practice. The Anagennisi partners, Dulex Ltd in collaboration with Gradmont-Gradacac Ltd and University of Zagreb, designed, cast and monitored the long-term shrinkage deformations of the indoor slab-on-grade slab at Gradmont's precast concrete factory in Gradacac, Bosnia and Herzegovina. A hybrid RTSF mix (20 kg/m3 of MSF+10 kg/m3 of RTSF) was used to comply with the design criteria which included a maximum load capacity of 20 kN/m2. The slab was monitored for one year using surveying equipment and visual inspection of cracks. During the monitoring period, the slab exhibited reasonable deformations (a maximum displacement of 3.3 mm for both, horizontal and vertical displacements) whilst after five years in use, the owners did not report any issues and were satisfied with the construction methodology and materials used. This work confirms that RSTF is a viable and sustainable solution for slab-on-grade applications. | ||
| Key Words | ||
| slab-on-grade; long-term monitoring; hybrid fibre reinforced concrete | ||
| Address | ||
| Ana Baricevic, Martina Grubor: Faculty of Civil Engineering, University of Zagreb, Kaciceva 26, Zagreb, Croatia Rinaldo Paar: Faculty of Geodesy, University of Zagreb, Kaciceva 26, Zagreb, Croatia Panos Papastergiou, Kypros Pilakoutas, Maurizio Guadagnini: Department of Civil and Structural Engineering, The University of Sheffield, Sir Frederick Mappin Building, Mappin Street, Sheffield, S1 3JD, UK | ||
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