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- W2053790726 abstract "This paper describes a study of the structure, composition and strength of cement paste near the cement-steel interface of an embedded wire. Scanning electron microscopy of paste and mortar specimens shows that the interface does not change appreciably for curing times greater than a week and suggests enrichment of the interface with Ca(OH)2. X-ray diffraction provides evidence that this enrichment amounts to 20% to 40% of the concentration of Ca(OH)2 in the bulk of the cement paste. The strength of the cement paste, deduced from indentation hardness measurements, shows that there is a marked decrease in strength within 0.75 mm from the wire surface. This appears to be a general feature of cement paste composites prepared with vibration. Cette étude donne une description de la structure, composition et résistance mécanique de la pâte de ciment prés de l'interface acier-ciment d'une fibre enrobée. La microscopie électronique à balayage démontre que l'interface ne change plus sensiblement pour des periodes de durcicement de plus d'une semaine, et suggère un enrichissement de l'interface en Ca(OH)2. La diffraction des rayons X donne une mesure du niveau d'enrichissement de 20% à 40% par rapport à la concentration de Ca(OH)2 au sein de la pâte de ciment. La résistance mécanique de la pâte de ciment déduite de mesures de dureté Vickers met en évidence un trés net affaiblissement à 0,75 mm de la surface de la fibre. Il semble que cela soit une caractéristique générale des composés à base de pâte de ciment préparés par vibration." @default.
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- W2053790726 date "1978-01-01" @default.
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- W2053790726 title "Interfacial phenomena in steel fibre reinforced cement I: Structure and strength of interfacial region" @default.
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- W2053790726 doi "https://doi.org/10.1016/0008-8846(78)90054-6" @default.
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