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Hydration of tricalcium silicate followed by /sup 29/Si NMR with cross-polarization

Journal Article · · J. Am. Ceram. Soc.; (United States)
; ; ;

The use of cross-polarization (CP) NMR in conjunction with magic angle sample spinning (MASS) to examine the hydration reaction of tricalcium silicate (C/sub 3/S) is described. In particular the very early stages of the reaction both with and without admixtures has been studied as well as the hydration in a ball mill. The combination of CP and non-CP/sup 29/Si NMR permits the distinction between silicate units associated with protons, ie., in hydrated material, and those in anhydrous material. It has been found that in paste hydration there is steady formation of a small amount of hydrated monomeric silicate units during the induction period. In ball mill hydration the formation of the crystalline calcium silicate hydrate, afwillite, which contains only hydrated monomeric silicate species, can be monitored. These results are interpreted in terms of possible mechanisms for C/sub 3/S hydration.

Research Organization:
Dept. of Metallurgy and Science of Materials, and Inorganic Chemistry Lab., Oxford Univ., Oxford OX1 3PH (GB)
OSTI ID:
7150289
Journal Information:
J. Am. Ceram. Soc.; (United States), Journal Name: J. Am. Ceram. Soc.; (United States) Vol. 71:2; ISSN JACTA
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360205* -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
656002 -- Condensed Matter Physics-- General Techniques in Condensed Matter-- (1987-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CALCIUM COMPOUNDS
CALCIUM SILICATES
CHEMICAL REACTIONS
EVEN-ODD NUCLEI
HYDRATION
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
NUCLEAR MAGNETIC RESONANCE
NUCLEI
OXYGEN COMPOUNDS
POLARIZATION
RESONANCE
SILICATES
SILICON 29
SILICON COMPOUNDS
SILICON ISOTOPES
SOLVATION
STABLE ISOTOPES