19 Steel slag aggregates, modified bitumen, cellulose fibers, recycled asphalt, and emulsions for road surfacing; aggregate material composed of glass, slag, steel slag, coal slag, or minerals for use as a filler in additives to asphalt to be used as a seal coating, loose aggregate over road surface, non-metal roofing granules, and abrasives; concrete; concrete aggregates; glass granules for marking roads; pavement tiles; rock materials used in the manufacture of flooring, roofing, countertops, walls, cladding and fireplaces; crushed glass for use as filtration media for residential and commercial water filtration systems; non-metallic highway, road, ground, footpath, playground and car park surfacing materials; non-metallic building materials used in the construction, preparation, surfacing and maintenance of roads, permanent ways, paths, runways, pavements, car-parks and car-ports, play areas and playgrounds; asphalt; tar; pitch; bitumen; tarmacadam; bitumen macadam; aggregate; roadstone; non-metallic and de-metallized residues from steel making processes; slag; slag for railroad ballast, embankment ballast, ground stabilization, drainage, and structural fill