Hydration of C{sub 3}S thin films
Thin films of C{sub 3}S of a few tens of nanometers were produced by electron beam evaporation. After verification that the chemical composition of the bulk material remained unchanged, the samples were hydrated with water vapor in a reaction chamber under saturated pressure and temperature conditions, and were kept isolated from atmospheric exposure throughout the whole duration of the experiment. Analyses by X-ray photoelectron spectroscopy at different stages of hydration evidence a shift of the Si peaks to higher energies and a subsequent decrease of the Ca-Si binding energy distance, indicating silicate polymerization expected upon formation of C-S-H. The measured molar Ca/Si ratio evolves from that of a jennite-like material, of about 1.55, at the beginning of the experiment (attributed to pre-hydration of the thin films), to a tobermorite-like ratio of 0.85 after 3 h of hydration.
- OSTI ID:
- 21596963
- Journal Information:
- Cement and Concrete Research, Vol. 42, Issue 4; Other Information: DOI: 10.1016/j.cemconres.2012.01.002; PII: S0008-8846(12)00003-8; Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0008-8846
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BINDING ENERGY
CALCIUM SILICATES
CHEMICAL COMPOSITION
ELECTRON BEAMS
EVAPORATION
HYDRATES
HYDRATION
PHYSICAL VAPOR DEPOSITION
POLYMERIZATION
THIN FILMS
WATER VAPOR
X-RAY PHOTOELECTRON SPECTROSCOPY
ALKALINE EARTH METAL COMPOUNDS
BEAMS
CALCIUM COMPOUNDS
CHEMICAL REACTIONS
DEPOSITION
ELECTRON SPECTROSCOPY
ENERGY
FILMS
FLUIDS
GASES
LEPTON BEAMS
OXYGEN COMPOUNDS
PARTICLE BEAMS
PHASE TRANSFORMATIONS
PHOTOELECTRON SPECTROSCOPY
SILICATES
SILICON COMPOUNDS
SOLVATION
SPECTROSCOPY
SURFACE COATING
VAPORS