Performance of G-Oil Well cement exposed to elevated hydrothermal curing conditions

G-Oil Well cement was modified by blending it with blast furnace slag and silica fume at various ratios. The hydration was carried out under the hydrothermal conditions (200 °C and 1.2 MPa) up to 7 days. TG and DTG were performed on cured pastes to identify the hydrated products, their quantity and...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2014-11, Vol.118 (2), p.865-874
Main Authors: Palou, Martin T., Šoukal, František, Boháč, Martin, Šiler, Pavel, Ifka, Tomáš, Živica, Vladimír
Format: Article
Language:English
Subjects:
Analytical Chemistry
Calorimetry
Cements
Chemistry
Chemistry and Materials Science
Compressive strength
Curing
Hydration
Inorganic Chemistry
Measurement Science and Instrumentation
Nanostructure
Oil wells
Physical Chemistry
Polymer Sciences
Porosity
Scanning electron microscopy
Silica
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Summary:G-Oil Well cement was modified by blending it with blast furnace slag and silica fume at various ratios. The hydration was carried out under the hydrothermal conditions (200 °C and 1.2 MPa) up to 7 days. TG and DTG were performed on cured pastes to identify the hydrated products, their quantity and their stability under given hydrothermal curing conditions. The microstructure of samples was observed by a scanning electron microscope. The mechanical compressive strength was determined and the pore structure was analyzed using mercury intrusion porosimeter. It was found out that the compressive strength values of blend G-Oil Well cements markedly increased with increasing blast furnace/silica ratio. The pore structure was consolidated, as demonstrated by the displacement of pore size distribution to the region of micro and nano pores.
ISSN:1388-6150
1588-2926
1572-8943
DOI:10.1007/s10973-014-3917-x