Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mechanical behaviour of brittle cement grains
Before attempting a modelling approach to the crushing mechanisms of 'cement clinker' it was necessary to characterize the mechanical behaviour of this material up to breakage. The diametrical compressive test was chosen, since it is the test closest to the typical loading within a packing of grains and a very convenient experimental approach for the analysis of the law of mechanical behaviour up to fragmentation of brittle granular material. The model of the grain as a hard brittle core surrounded by a thin crumbly skin leads us to associate the contact setting with the crumbly skin behaviour and the brekage with the brittle core behaviour. This analysis allowed us to define scaling laws for the skin thickness and the breakage load. The breakage force increases according to a power law of the grain diameter with an exponent of 1.5, and it is shown that the mean factor K0 is an intrinsic characteristic parameter proportional to the tenacity of the material.
Mechanical behaviour of brittle cement grains
Before attempting a modelling approach to the crushing mechanisms of 'cement clinker' it was necessary to characterize the mechanical behaviour of this material up to breakage. The diametrical compressive test was chosen, since it is the test closest to the typical loading within a packing of grains and a very convenient experimental approach for the analysis of the law of mechanical behaviour up to fragmentation of brittle granular material. The model of the grain as a hard brittle core surrounded by a thin crumbly skin leads us to associate the contact setting with the crumbly skin behaviour and the brekage with the brittle core behaviour. This analysis allowed us to define scaling laws for the skin thickness and the breakage load. The breakage force increases according to a power law of the grain diameter with an exponent of 1.5, and it is shown that the mean factor K0 is an intrinsic characteristic parameter proportional to the tenacity of the material.
Mechanical behaviour of brittle cement grains
Mechanisches Verhalten von spröden Zementkörnern
Vallet, D. (Autor:in) / Charmet, J.C. (Autor:in)
Journal of Materials Science ; 30 ; 2962-2967
1995
6 Seiten, 9 Bilder, 9 Quellen
Aufsatz (Zeitschrift)
Englisch
mechanische Festigkeit , Zement , Korn (Kristallgefüge) , Simulationsmodell , Bruchfestigkeit , Druckbeanspruchung , Versprödung , Heterogenität , Mauerziegel , Spannungsverteilung , Bruchlast , Korngröße , Wechsellast (mechanisch) , Berührungsfläche , praktische Untersuchung , Spannungsintensitätsfaktor , Festigkeit , Simulation , Bruchzähigkeit , Druckspannung , mechanisches Spannungsfeld , Schwingbeanspruchung , zyklische Belastung , experimentelle Untersuchung
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