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The use of geometrically based particle packing models with fine particles



Title: The use of geometrically based particle packing models with fine particles
Author(s): S.A.A.M. Fennis, J.C. Walraven, J.A. den Uijl
Paper category : conference
Book title: International RILEM Symposium on Concrete Modelling - ConMod '08
Editor(s): E. Schlangen and G. De Schutter
Print-ISBN: 978-2-35158-060-8
e-ISBN: 978-2-35158-076-9
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 471 - 478
Total Pages: 8
Nb references: 7
Language: English


Abstract: In the paper the principles and possibilities of particle packing models are explained on the basis of mathematical descriptions. Geometry-based particle packing models calculate the packing density through the volume occupied by each particle group and physical restrictions.
Experiments to determine the packing density of aggregate mixtures and powders are described. The experimentally determined packing densities are compared to particle packing densities calculated with the Compressible Packing Model. Furthermore, calculated packing densities are related to the workability of mortar mixtures in order to predict the water demand. Differences up to 4.5% between the measured and the calculated packing densities were found. The experiments on cement pastes showed a trend which could not be retrieved from the particle packing calculations. To improve the particle packing model it is suggested to implement inter-particle forces in the model. A method to investigate the effect of these inter-particle forces on the packing density by the simulation model HADES is presented.


Online publication: 2009-06-15
Publication type : full_text
Public price (Euros): 0.00