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RESEARCH PRODUCT

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

Eva VejmelkováStefania GrzeszczykRobert ČErnýJitka KrejsováLenka ScheinherrováPetr BezdičkaMagdaléna DoleželováAneta Matuszek-chmurowskaMartin Keppert

subject

Temperature resistanceMaterials science0211 other engineering and technologieschemistry.chemical_element02 engineering and technologyBuilding and ConstructionZincengineering.material021001 nanoscience & nanotechnologyMicrostructureDurabilityCorrosionchemistryCoating021105 building & constructionThermalengineeringGeneral Materials ScienceSurface layerComposite material0210 nano-technology

description

Abstract 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 °C and 1000 °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 °C.

yearjournalcountryeditionlanguage
2019-03-01Cement and Concrete Research
https://doi.org/10.1016/j.cemconres.2018.12.008