- Head of the research group: Prof. Ing. Jaroslav Halvonik, PhD., jaroslav.halvonik@stuba.sk
- Contact person: Assoc. Prof. Ing. Ivan Hollý, PhD., ivan.holly@stuba.sk
Research focus
- The research focuses on two areas of application of recycled materials for the production of load-bearing concrete. The first is the use of recycled steel fibres (RSF) as a replacement for conventional materials in concrete. The second is the use of recycled aggregate from concrete (RCA) and recycled aggregate from masonry and mixed structures (RA).
- The application of RSF as a replacement for industrial steel fibres is carried out both at the level of material research and on structural elements to increase the shear resistance of elements without shear reinforcement, and research focused on the long-term properties of concrete with a content of RSF, which examines the durability of structural elements exposed to environmental influences that cause corrosion of steel reinforcement.
Selected publications
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ZIA, Asad - ZHANG, Pu - HOLLÝ, Ivan. Effectiveness of Hybrid Discarded tire/Industrial Steel fibers for improving the sustainability of concrete structures. In Construction and Building Materials. No. 378 (2023), online, [13] s., art. no. 131226. DOI:10.1016/j.conbuildmat.2023.131226
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ZIA, Asad - ZHANG, Pu - HOLLÝ, Ivan. Long-term performance of concrete reinforced with scrap tire steel fibers in hybrid and non-hybrid forms: experimental behavior and practical applications. In Construction and Building Materials. No. 409 (2023), online, [20] s., art. no. 134011. DOI: 10.1016/j.conbuildmat.2023.134011
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ZIA, Asad - HOLLÝ, Ivan - ZHANG, Pu. Constitutive modeling and extended performance evaluation of concrete reinforced with non-hybrid waste tire steel fibers. In Journal of Building Engineering. No. 96 (2024), online, [31] s., art. no. 110522. DOI: 10.1016/j.jobe.2024.110522
- Research into the application of concrete containing RA derived from masonry and mixed structures in pressed elements, in beams and filigree slabs with RCA overcast.
Selected publication
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KNAPCOVÁ, Veronika - PACHECO, João - DE BRITO, Jorge - SONNENSCHEIN, Róbert. Eurocode 2 design of recycled aggregate concrete elements under compression: Evaluation through model uncertainties from tests on columns. In Structural Concrete. Vol. 25, no. 5 (2024), s. 3050-3064. DOI: 10.1002/suco.202300715
- Research into the use of concrete containing coarse recycled concrete aggregate (CRCA) in flat slabs, focusing on punching resistance.
- Research into the long-term properties of concretes containing RA. Testing concrete samples in a CO2 chamber for the development of concrete carbonation and in chloride-containing solutions for the rate of chloride ion penetration into concrete.
