Class H cement hydration at 180 °C and high pressure in the presence of added silica

Journal Article · Mon Oct 06 00:00:00 EDT 2008 · Cement Concrete Res.

DOI:https://doi.org/10.1016/j.cemconres.2007.12.004· OSTI ID:1006700

Jupe, Andrew C; Wilkinson, Angus P; Luke, Karen; Funkhouser, Gary P ^[1]

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1. Halliburton

Under deep oil-well conditions of elevated temperature and pressure, crystalline calcium silicate hydrates are formed during Portland cement hydration. The use of silica rich mineral additives leads to the formation of crystalline hydrates with better mechanical properties than those formed without the additive. The effects of silica flour, silica fume (amorphous silica), and a natural zeolite mixture on the hydration of Class H cement slurries at 180 C under externally applied pressures of 7 and 52 MPa are examined in real time using in-situ synchrotron X-ray diffraction. For some compositions examined, but not all, pressure was found to have a large effect on the kinetics of crystalline hydrate formation. The use of silica fume delayed both C{sub 3}S hydration and the formation of crystalline silicate hydrates compared to what was seen with other silica sources.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
• Sponsoring Organization: USDOE
• OSTI ID: 1006700
• Journal Information: Cement Concrete Res., Vol. 38, Issue (5) ; 05, 2008; ISSN 0008-8846
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

36 MATERIALS SCIENCE
43 PARTICLE ACCELERATORS
ADDITIVES
AEROSOLS
AMORPHOUS STATE
CALCIUM SILICATES
CEMENTS
FLOUR
HYDRATES
HYDRATION
KINETICS
MECHANICAL PROPERTIES
MINERALS
MIXTURES
PORTLAND CEMENT
PRESSURE RANGE MEGA PA 10-100
SILICA
SILICATES
SLURRIES
SYNCHROTRON RADIATION
USES
X-RAY DIFFRACTION
ZEOLITES