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Relationship between static bending and compressive behaviour of particle-reinforced cement composites
Innovative particle-reinforced materials made of alumina particles and cement-based matrix were designed, manufactured and tested to evaluate the potential use of ceramic aggregates in concretes. These particle-reinforced composites were tested in three-point bending and uniaxial compression conditions to determine the influence of the shape and size of the ceramic inclusions, and the addition of silica fume on the mechanical properties. A specific methodology combining post-mortem observations with a statistical analysis of tensile failure stresses (average strength and Weibull modulus) was conducted to deduce the origin of failure for each cement-based composite (porosity or ceramic particles/matrix decohesion). A remarkable correlation is observed between bending failure stress level and the average strength measured under uniaxial compression loading. As main conclusion, addition of alumina particles in a mortar appears to strengthen or to weaken the composite depending on whether silica fume is used in the cementitious matrix.
Relationship between static bending and compressive behaviour of particle-reinforced cement composites
Innovative particle-reinforced materials made of alumina particles and cement-based matrix were designed, manufactured and tested to evaluate the potential use of ceramic aggregates in concretes. These particle-reinforced composites were tested in three-point bending and uniaxial compression conditions to determine the influence of the shape and size of the ceramic inclusions, and the addition of silica fume on the mechanical properties. A specific methodology combining post-mortem observations with a statistical analysis of tensile failure stresses (average strength and Weibull modulus) was conducted to deduce the origin of failure for each cement-based composite (porosity or ceramic particles/matrix decohesion). A remarkable correlation is observed between bending failure stress level and the average strength measured under uniaxial compression loading. As main conclusion, addition of alumina particles in a mortar appears to strengthen or to weaken the composite depending on whether silica fume is used in the cementitious matrix.
Relationship between static bending and compressive behaviour of particle-reinforced cement composites
Arias, A. (author) / Forquin, P. (author) / Zaera, R. (author) / Navarro, C. (author)
Composites, Part B: Engineering ; 39 ; 1205-1215
2008
11 Seiten
Article (Journal)
English
Additiv , Aluminiumoxid , Betonmörtel , Biegefestigkeit , Druckbeanspruchung , Druckfestigkeit , einachsige Verformung , Fehleranalyse , Fehlerwahrscheinlichkeit , partikelverstärkter Verbundwerkstoff , Portlandzement , Rauchgasreinigung , Schlagfestigkeitsprüfung , selbstverdichtender Beton , Silicafeinststaub , Spannungs-Dehnungs-Diagramm , Zugspannung
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