Premium
Hydration of Tricalcium Silicate Followed by 29 Si NMR with Cross‐Polarization
Author(s) -
RODGER SALLY A.,
GROVES GEOFFREY W.,
CLAYDEN NIGEL J.,
DOBSON CHRISTOPHER M.
Publication year - 1988
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1988.tb05823.x
Subject(s) - silicate , anhydrous , hydrate , calcium silicate hydrate , magic angle , monomer , hydration reaction , chemistry , magic angle spinning , calcium silicate , inorganic chemistry , mineralogy , chemical engineering , nuclear magnetic resonance spectroscopy , materials science , organic chemistry , cement , composite material , engineering , polymer
The use of cross‐polarization (CP) NMR in conjunction with magic angle sample spinning (MASS) to examine the hydration reaction of tricalcium silicate (C 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 29 Si NMR permits the distinction between silicate units associated with protons, i.e., 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 3 S hydration.