Formation and properties of C-S-H -PEG nano-structures

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Journal titleMaterials and Structures
Pages10031014; # of pages: 12
Subjectcalcium silicate hydrate (C-S-H), intercalation, organic solvents, PEG, nanostructure; Cement/Concrete
AbstractResults of an investigation of the intercalation potential of polyethylene glycol (PEG) with synthetic and pre-treated C-S-H are reported. The partial intercalation of PEG molecules in the interlayer of C-S-H is discussed. The effective and strong interaction of PEG molecules with the C-S-H surface was shown using XRD, 13C CP and 29Si MAS NMR, and DTGA. The position and character of the 002 low angle XRD peak of C-S-H are affected by drying procedures and concomitant chemical treatment preceding intercalation and the reaction temperature. Recovery of the initial 002 position after severe drying and intercalation with distilled water or PEG is incomplete but is accompanied by an increase in intensity. It is inferred that the stability of C-S-H binders in concrete can be impacted by a variation in nanostructure dependent on curing temperature and use of chemical admixtures.
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AffiliationNRC Institute for Research in Construction; National Research Council Canada
Peer reviewedYes
NRC number50315
NPARC number20377731
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Record identifier5993b0cd-ec25-4f65-9871-7442d4f96cfd
Record created2012-07-24
Record modified2016-05-09
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