I.WORK

non-metallic building materials, namely, building stones, paving blocks and paving tiles; non-metallic rigid pipes for building; asphalt, pitch and bitumen; non-metallic transportable buildings; monuments not of metal; concrete; cement; building stones; hydraulic cement; mortar; natural or industrial hydraulic binders, namely, adhesive mortar for building purposes; non-agricultural siliceous or calcareous aggregates; non-agricultural lime for use in construction; granite sand; sandstone for the building sector; artificial stones; refractory construction materials as powders, grains, bricks, blocks, slabs; building materials made of refractory materials, not of metal