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Pathway of a damaging mechanism – Analyzing chloride attack by synchrotron based X-ray diffraction

Författare:

M C Schlegel

J Stroh

Katarina Malaga
katarina.malaga@ri.se

Birgit Meng

U Panne

F Emmerling

Publikationstyp Utländska tidskriftsartiklar
Publiceringsår 2015
Språk Engelska
Sökord Chloride attack; Durability; EDX; In-situ; Portland cement; X-Ray diffraction
Summary (Abstract) Typically, the changes of the phase compositions due to the chemical attack are studied in-situ only by chemical analysis or microscopy. In this study, the chloride transport and binding in the cement matrix in different cementitious materials was analyzed by synchrotron based X-ray diffraction (SyXRD) and energy dispersive X-ray spectroscopy (EDX). Sample materials consisting of cement paste were embedded in high concentrated sodium chloride solution over different time spans. Afterwards, the phase and chemical compositions were determined. The high spatial resolution and the information about the chloride distribution offer a detailed view of chloride binding in the cement matrix and allow the conclusions about the degradation mechanisms. The results are discussed related to the influence of different supplementary cementitious materials on the damaging mechanism.
Biblioteksdata Solid State Sciences, 44, pp. 45-54, 2015.
ISSN 1293-2558
Anmärkningar Schlegel, M.C., Stroh, J., Malaga, K., Meng, B., Panne, U., Emmerling, F.;
Elsevier Masson SAS;
DOI: 10.1016/j.solidstatesciences.2015.03.021



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