NDLI: NMR, XRD, IR and synchrotron NEXAFS spectroscopic studies of OPC and OPC/slag cement paste hydrates

Content Provider	Springer Nature Link
Author	Mendes, Alessandra Gates, Will P. Sanjayan, Jay G. Collins, Frank
Copyright Year	2011
Abstract	This work aims to determine the fundamental similarities and/or differences between OPC and OPC/slag paste hydrates. OPC and 35% slag pastes are investigated using five techniques: $^{29}$Si NMR, $^{27}$Al NMR, X-ray diffraction (XRD), infrared (IR) and synchrotron near edge X-ray absorption fine structure (NEXAFS) spectroscopy. $^{29}$Si NMR provides valuable information related to the formation of the C–S–H gel, the main hydrated phase of the cement paste. $^{27}$Al NMR is a useful tool to characterize calcium aluminates and aluminate hydrates such as ettringite and monosulphate hydrate. XRD identifies polycrystalline phases of the hardened cement paste, including ettringite, monosulphate and CaOH$_{2}$. Vibrational frequencies in IR assist in identifying the silicate, sulphate and carbonate phases of the cement paste. As far as we are aware, Si K-edge NEXAFS has never been applied in cement research and its advantages and disadvantages are discussed. Using these techniques, a comparison between OPC and 35% slag paste hydrates is made, shedding light on differences in the amount and form of hydrated phases present, especially the absence of ettringite in the 35% slag paste.
Starting Page	1773
Ending Page	1791
Page Count	19
File Format	PDF
ISSN	13595997
Journal	Materials and Structures
Volume Number	44
Issue Number	10
e-ISSN	18716873
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-04-07
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Cement Slag Paste hydrates NMR XRD IR Building Materials Theoretical and Applied Mechanics Structural Mechanics Operating Procedures, Materials Treatment Materials Science Civil Engineering
Content Type	Text
Resource Type	Article
Subject	Building and Construction Mechanics of Materials Materials Science Civil and Structural Engineering

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