Effect of pressure on the crystal structure of ettringite

X-ray diffraction and infrared data have been collected from a sample of ettringite from ambient pressure to 6.4 GPa. The sample was found to reversibly transform to an amorphous phase at 3 GPa. The isothermal bulk modulus of ettringite was found to be 27(7) GPa and the incompressibilities of the la...

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Veröffentlicht in:	Cement and concrete research 2008-01, Vol.38 (1), p.19-26
Hauptverfasser:	Clark, S.M., Colas, B., Kunz, M., Speziale, S., Monteiro, P.J.M.
Format:	Artikel
Sprache:	eng
Schlagworte:	ALUMINIUM COMPOUNDS Amorphous material AMORPHOUS STATE Analysis of cement phases and constituents Applied sciences Buildings. Public works CALCIUM COMPOUNDS Cement concrete constituents Cements CRYSTAL STRUCTURE Ettringite Exact sciences and technology HYDROXIDES LATTICE PARAMETERS Materials MATERIALS SCIENCE PRESSURE RANGE GIGA PA Properties of anhydrous and hydrated cement, test methods SULFATE MINERALS SULFATES X-RAY DIFFRACTION
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Beschreibung
Zusammenfassung:	X-ray diffraction and infrared data have been collected from a sample of ettringite from ambient pressure to 6.4 GPa. The sample was found to reversibly transform to an amorphous phase at 3 GPa. The isothermal bulk modulus of ettringite was found to be 27(7) GPa and the incompressibilities of the lattice parameters were found to be 71(30) GPa along a and 108(36) GPa along c.
ISSN:	0008-8846 1873-3948
DOI:	10.1016/j.cemconres.2007.08.029