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Title

Investigation on the combined interaction of sulphate and acidic attack on concretes exposed to aggressive environments

AuthorsAlonso, M. Cruz; Villar Arribas, Kristina; Qvaeschning, Dirk; Irico, Sara; Pérez, Gloria
Issue Date2020
PublisherSpringer Nature
CitationExternal Sulphate Attack – Field Aspects and Lab Tests: 33-43 (2020)
SeriesRILEM Bookseries 21
AbstractThe study presented the results about the sulfuric acid corrosion, at very low pH, of a concrete containing blast furnace slag and fly-ash as SCM. Since no standard method are present regarding the acid corrosion, the comparison of the results between different laboratories is strongly related to the experimental conditions. In this research two methods were compared based on the complete concrete immersion in a sulfuric acid solution with different approaches to keep the pH 2 constant. The evolution of damage was followed by the loss of mass (kg/m2); moreover, the microstructure was observed by electron-scanning microscopy and the elastic modulus was performed as non-destructive test (NDT). The rate of degradation after 35 days of exposure, according the loss of mass due to the calcium dissolution of cement paste, is comparable between the two methods. The influence on the experimental parameters and the relation with the combined sulphate and acidic attack is discussed.
Publisher version (URL)https://doi.org/10.1007/978-3-030-20331-3_3
URIhttp://hdl.handle.net/10261/219636
DOI10.1007/978-3-030-20331-3_3
ISBN978-3-030-20330-6
Appears in Collections:(IETCC) Libros y partes de libros
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