Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Optimization of packing density of aggregates
The results of particle shape and particle size measurements carried out with the photooptical method show a significant relationship between the packing density and the width of particle size distribution, characterized with the Fuller-exponent n. The particle shape, described with the descriptor sphericity SPHT, is the parameter of the different curves. The packing density increases with the increase of the width of particle size distribution to the maximum of these curves and otherwise also, when the particle shape will be changed from angular and rough to rounded and smooth. So the same packing density of aggregates is achieved with a broad distribution and an angular and rough particle shape or with a narrow distribution and a well-rounded particle shape. The workability properties, for instance of a self compacting mortar, depends therefore on the packing density and additionally on the particle roughness.
Optimization of packing density of aggregates
The results of particle shape and particle size measurements carried out with the photooptical method show a significant relationship between the packing density and the width of particle size distribution, characterized with the Fuller-exponent n. The particle shape, described with the descriptor sphericity SPHT, is the parameter of the different curves. The packing density increases with the increase of the width of particle size distribution to the maximum of these curves and otherwise also, when the particle shape will be changed from angular and rough to rounded and smooth. So the same packing density of aggregates is achieved with a broad distribution and an angular and rough particle shape or with a narrow distribution and a well-rounded particle shape. The workability properties, for instance of a self compacting mortar, depends therefore on the packing density and additionally on the particle roughness.
Optimization of packing density of aggregates
Optimierung der Packungsdichte von Zuschlagstoffen
Stark, Ursula (Autor:in) / Mueller, Anette (Autor:in)
2008
7 Seiten, 3 Bilder, 2 Tabellen, 10 Quellen
Aufsatz (Konferenz)
Englisch
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