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Frost salt scaling resistance of concrete containing CFBC fly ash

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Abstract

The possibility for using coal combustion by-products in concrete exposed to frost-salt aggression was investigated. The research was aimed to assess an influence addition of circulating fluidized bed combustion (CFBC) fly ash on frost-salt scaling of air-entrained concrete. For evaluation of the resistance of concrete to frost salt scaling the test called “depth sensing indentation” (DSI) was applied. The DSI test method was implemented on a universal testing frame using a standard Vickers indenter. Experimental tests were performed on cement paste specimens and concrete specimens designed with partial replacement of cement with coal combustion by-products. The mass of scaled material in standard frost salt scaling resistance tests on concrete was inversely proportional to the Vickers hardness of the paste containing CFBC fly ash; the best-fit arithmetic relationship is provided.

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Acknowledgement

The investigation was financially supported by public funds for scientific research available for the period 2006–2009 (Polish Ministry of Science and Higher Education : Research Project no 4 T07E 036 30).

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Correspondence to Michal A. Glinicki.

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Glinicki, M.A., Zielinski, M. Frost salt scaling resistance of concrete containing CFBC fly ash. Mater Struct 42, 993–1002 (2009). https://doi.org/10.1617/s11527-008-9438-y

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