Abstract: An extended wear-life composite wear structure particularly suitable for use as a liner in the form of modular panels, generally including a ceramic layer of spaced apart ceramic tiles, each having at least one anchor receiving structure therethrough, overlying a resilient energy absorbing layer separating the ceramic layer from a base layer, and ceramic tile anchors linking each of the ceramic tiles to the base layer via cooperative engagement with the anchor receiving structures of the ceramic tiles. This composite structure permits independent temporary displacement of each of the tiles upon a surface impact, improved retention of the tiles, and greatly enhances the overall structural integrity of the composite as the intermediate layer, layers and or structures are securedly "sandwiched" between the abrasion and impact resistant ceramic layer and the structural base layer.

Abstract: This improved screening apparatus for sorting various size aggregates utilizes a screen made of polyurethane having two sets of perpendicular evenly spaced parallel webs each of which enclose a wire provided for reinforcement. If desired, the reinforcing wires can be single or multiple through either one or through both sets of webs. Web segments extend between web intersections. Areas enclosed by opposed adjacent web segments provide for the screen openings. This area can contain either a single hole or a plurality of holes to provide a number of different screen sizes. The holes increase in cross-section from the screen aggregate input side to the output side to eliminate or greatly minimize particles wedging within the holes. Backing bucker bars of various widths attached to the lower side of the screen provide a predetermined screen cross-section when their lower edges are supported horizontally.