19 Concrete; transport concrete; ready mixed concrete; mortar; ready mixed mortar; aggregates for concrete, especially sand and gravel; concrete products, namely, light, heavy and aerated concrete building blocks, pavements, prefabricated ceilings and walls, prefabricated cellar units, prefabricated sewage works units; standard cements; masonry cement; cement mixes; specialty cements, namely, aluminous cements, white cements, trass cements, highly sulphate resisting Aquament and Portland cement for hydraulic engineering, anti-sulphate cement for sewage works construction, Microcem extremely fine cement for soil injection and masonry repair, Depocrete and Procrete for waste dump sealing; specific binders, namely, tailor-made ready mixed cement products for geotechnology, environmental technology and road construction; limestone and lime products for non-agricultural use; limestone aggregates; limestone sand; pulverized limestone; burnt limestone; white pulverized limestone; limestone hydrate; dry mortar, especially underlayment, overlayment, renovation and repair plasters, interior plasters, thin layer plasters, filler, bonding and ready to use plasters on a gypsum and lime/cement basis, masonry mortar, anhydrous fluidized floor finish, stucco gypsum; special gypsums, namely, industrial modelling gypsum and modelling materials; expanded clay, especially lightweight fillers, blocks and wall or floor units; sand-lime bricks, especially sand-lime brick construction systems, solid, perforated, oversize and facing sand-line bricks; bitumen-based or tar-based sealants for asphalt, driveways, or roofing