Effect of Cu-Zn coated steel fibers on high temperature resistance of reactive powder concrete

0502032 - ÚACH 2020 RIV GB eng J - Článek v odborném periodiku
Scheinherrová, L. - Vejmelková, E. - Keppert, M. - Bezdička, Petr - Doleželová, M. - Krejsova, J. - Grzeszczyk, S. - Matuszek-Chmurowska, A. - Černý, R.
Effect of Cu-Zn coated steel fibers on high temperature resistance of reactive powder concrete.
Cement and Concrete Research. Roč. 117, MAR (2019), s. 45-57. ISSN 0008-8846. E-ISSN 1873-3948
Grant CEP: GA ČR(CZ) GA17-11635S
Institucionální podpora: RVO:61388980
Klíčová slova: Thermal treatment * Microstructure * Corrosion * Fiber reinforcement * High-performance concrete
Obor OECD: Inorganic and nuclear chemistry
Impakt faktor: 8.328, rok: 2019
Způsob publikování: Open access s časovým embargem

Even though many studies have reported about the impacts of shape, length and distribution of steel fiber reinforcement on global concrete properties, there is a lack of information about the influence of coating type of steel fibers on high temperature resistance of concrete. This paper describes the effect of Cu-Zn coated steel fibers on selected properties of reactive powder concrete (RPC) after exposure to elevated temperatures. The initial corrosion of zinc in Cu-Zn surface layer is found to be already activated by the alkaline environment of the fresh concrete. The RPC samples reinforced with Cu-Zn coated steel fibers are heated to 600 degrees C and 1000 degrees C, and the influence of thermal load on microstructure, basic physical, mechanical, thermal and durability properties is analyzed. Based on the obtained results, it can be concluded that the maximal temperature to maintain effectiveness of the RPC reinforced with Cu-Zn steel fibers is 600 degrees C.
Trvalý link: http://hdl.handle.net/11104/0293984