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Hydration of white cement by spin grouping NMR

✍ Scribed by J.C. MacTavish; L. Miljkovic; M.M. Pintar; R. Blinc; G. Lahajnar

Publisher
Elsevier Science
Year
1985
Tongue
English
Weight
509 KB
Volume
15
Category
Article
ISSN
0008-8846

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✦ Synopsis

The hydrogen NMR parameters Ti, T2, and Moi of a white cement were monitored as a function of hydration time. From the nature and time evolution of the some 20 observables that eventually developed, a partial description of the dynamics of cement hydration is proposed.

The results depict the behaviour of the calcium hydroxide, fluid gel, ettringite, solid C-S-H, Fe-relaxed C-S-H, Fe-relaxed pore water, and tentatively differientiated micropore and capillary pore water phases.

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NMR spin grouping in hydrating cement at
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The early stages of cement hydration were investlgated by proton spinspin relaxation time (T c) measurements because these experiments can be performed much faster (in several seconds) than the characterlstlc time for a change in hydration evolution. In addition, comparing the free induction decays