Comparative and semi-quantitative XRD analysis of Friedel’s salt originating from pozzolan and Portland cement

► Pozzolanic activity of pozzolans in sodium chloride solution. ► Friedel’s salt originated from two origins: Al 2 O 3 r - of pozzolans and C 3A of PC. ► Formation rate of Friedel’s salt from Al 2 O 3 r - is notably higher than for C 3A origin. ► Friedel’s salt amount formed in PC blends is direct p...

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Bibliographic Details
Published in:Construction & building materials 2011-05, Vol.25 (5), p.2370-2380
Main Authors: Talero, R., Trusilewicz, L., Delgado, A., Pedrajas, C., Lannegrand, R., Rahhal, V., Mejía, R., Delvasto, S., Ramírez, F.A.
Format: Article
Language:English
Subjects:
Cement
Chemical properties
Chloride attack
Diffraction
Friedel’s salt
Portland cements
Pozzolans
X-rays
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Summary:► Pozzolanic activity of pozzolans in sodium chloride solution. ► Friedel’s salt originated from two origins: Al 2 O 3 r - of pozzolans and C 3A of PC. ► Formation rate of Friedel’s salt from Al 2 O 3 r - is notably higher than for C 3A origin. ► Friedel’s salt amount formed in PC blends is direct proportional to the Al 2 O 3 r - content of their pozzolan. The Friedel’s salt ( Fs) is often formed when reinforced concrete is attacked by chlorides from marine environmental and/or thaw salts. In this investigation, a semi-quantitative analysis and study of the Fs (2 θ range = 11.16–11.34°) in the solid phase of the Frattini test was made by XRD analysis. For this purpose, two Portland cements (PC) P1 (14% C 3A) and PY6 (
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2010.11.037