B - Operations – Transporting – 28 – B
Patent
B - Operations, Transporting
28
B
B28B 23/18 (2006.01) B28B 3/26 (2006.01) B28B 21/64 (2006.01) B29C 47/02 (2006.01) B29C 70/50 (2006.01) B05C 5/02 (2006.01) B29C 53/58 (2006.01)
Patent
CA 2201605
Methods and apparatus (50) for continuously extruding a hydraulically settable mixture (52) and simulataneously placing continuous filaments (64) within the extruding mixture (52) to yield articles having a filament-reinforced, hydraulically settable matrix. The filaments (64) can be placed within the mixtures (52) in a parallel configuration a helical configuration, or combinations thereof in order to yield an article having the desired properties of, e.g., tensile strength, flexural strength, hoop strength, burst strength, toughness, and elongation ability. The desired properties of the hydraulically settable mixture (52), as well as of the cured hydraulically settable matrix of the hardened article, may also be adjusted by including varying amounts and types of aggregates, discontinuous fibers, binders, rheology-modifying agents dispersants, or other admixtures within the hydraulically settable mixture (52). Optimizing the particle packing density while including a deficiency of water yields a hydraulically settable mixture (52) which will flow when an extrusion pressure is applied but be form stable upon being extruded.
Cette invention concerne un procédé et un dispositif (50) permettant l'extrusion en continu d'un mélange hydraulique (52) et l'incorporation simultanée de filaments continus (64) à ce mélange, pour obtenir des articles constitués d'une matrice hydraulique et d'une armature de filaments. Les filaments (64) peuvent être incorporés au mélange hydraulique (52) suivant une disposition parallèle, hélicoïdale, ou combinée, selon les propriétés recherchées, c'est-à-dire résistance à la traction, à la flexion, à l'effort circonférentiel, à la rupture, ténacité et élongation. Les propriétés du mélange hydraulique (52) et de l'article fabriqué à partir du mélange hydraulique (52) peuvent aussi être modifiées par addition au mélange (52), en quantités variables, de différents types de granulats, de fibres discontinues, d'agents rhéologiques, de dispersants ou autres additifs. En optimisant la densité des particules et la quantité d'eau, on obtient un mélange assez fluide pour être extrudé, mais assez ferme pour conserver la forme imprimée par l'extrusion.
Andersen Per Just
Hodson Simon K.
Cassan Maclean
E. Khashoggi Industries
E. Khashoggi Industries Llc
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