[sup 29]Si solid state NMR study of tricalcium silicate and cement hydration at high temperature
- URA CNRS, Paris (France). Lab. de Physique et Mecanique des Milieux Heterogenes Univ. Pierre et Marie Curie, Paris (France)
- Inst. Francais du Petrole, Rueil Malmaison (France)
Oilwell cementing involves the placement of a cement slurry in the annulus between the metal casing and the geological formation. Its principal functions are to isolate the different zones within the wellbore and to support the casing at each stage of drilling. [sup 29]Si high resolution solid state NMR has been used to follow the hydration kinetics of class G Portland cement and of its major component: tricalcium silicate Ca[sub 3]SiO[sub 5] (C[sub 3]S). Samples were hydrothermally synthesized at temperatures between 60 and 120C; hydration was stopped at selected reaction times, from 30 minutes to 14 days, by the acetone-ether method of water-removing. [sup 29]Si NMR spectra of hydrates clearly show that, in silicate chains, the ratio between the silicon atoms of end groups and those of middle groups depends not only on the time of hydration, but also on the synthesis temperature.
- OSTI ID:
- 6046197
- Journal Information:
- Cement and Concrete Research; (United States), Journal Name: Cement and Concrete Research; (United States) Vol. 23:5; ISSN 0008-8846; ISSN CCNRAI
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ALKALINE EARTH METAL COMPOUNDS
BUILDING MATERIALS
CALCIUM COMPOUNDS
CALCIUM SILICATES
CEMENTING
CEMENTS
EVEN-ODD NUCLEI
HYDRATION
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MATERIALS
NUCLEAR MAGNETIC RESONANCE
NUCLEI
OIL WELLS
OXYGEN COMPOUNDS
PORTLAND CEMENT
RESONANCE
SILICATES
SILICON 29
SILICON COMPOUNDS
SILICON ISOTOPES
SOLVATION
STABLE ISOTOPES
TEMPERATURE DEPENDENCE
WELLS