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Tensile tests on plain and fibre reinforced geothermal cements
The tensile behaviour of different geothermal well cement formulations was investigated in order to determine how these materials perform under such loading and how tensile capacity can be improved. The influence of latex, perlite and fibres on the load-displacement relationship of the cements was measured on notched cylinders. The fracture surfaces were examined to further elucidate failure mechanisms. Unreinforced cements exhibited linear elastic behaviour to different degrees and failed in a brittle manner. Cements reinforced with either carbon (150 microns) or steel (1mm to 3 mm) microfibres required greater loads for failure. However, the microfibres did not provide any major improvement in ductility. Addition of 13 mm steel fibres to the cements resulted in both strengthening and transition to ductile behaviour. Inclusion of the types of fibres studied in this work in cements offers potential benefits in maintaining the integrity of geothermal wells when tensile stresses are involved.
Tensile tests on plain and fibre reinforced geothermal cements
The tensile behaviour of different geothermal well cement formulations was investigated in order to determine how these materials perform under such loading and how tensile capacity can be improved. The influence of latex, perlite and fibres on the load-displacement relationship of the cements was measured on notched cylinders. The fracture surfaces were examined to further elucidate failure mechanisms. Unreinforced cements exhibited linear elastic behaviour to different degrees and failed in a brittle manner. Cements reinforced with either carbon (150 microns) or steel (1mm to 3 mm) microfibres required greater loads for failure. However, the microfibres did not provide any major improvement in ductility. Addition of 13 mm steel fibres to the cements resulted in both strengthening and transition to ductile behaviour. Inclusion of the types of fibres studied in this work in cements offers potential benefits in maintaining the integrity of geothermal wells when tensile stresses are involved.
Tensile tests on plain and fibre reinforced geothermal cements
Zugfestigkeitsuntersuchungen an unbewehrten und faserverstärkten geothermalen Zementen
Berndt, M.L. (author) / Mancini, C.E. (author)
Journal of Materials Science ; 39 ; 1727-1733
2004
7 Seiten, 12 Bilder, 2 Tabellen, 17 Quellen
Article (Journal)
English
Zement , hydraulischer Zement , Zugbeanspruchung , Zugdehnung , Zugdehnungseigenschaft , Spannungs-Dehnungs-Verhalten , Spannungs-Dehnungs-Diagramm , faserverstärkter Beton , faserverstärkter Werkstoff , faserverstärkter Zement , Faserverstärkung , Werkstoffgefüge , Mikrostruktur , Bruchfläche , Bruchgefüge , Perlit (vulkanisch) , Stahlfaser , stahlfaserverstärkter Beton , Mikrosilica , elastische Verformung , wahre Spannungs-Dehnungskurve , Latex , Erdölbohrlochzement
Tensile tests on plain and fibre reinforced geothermal cements
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