chemical additives; chemical additives for asphalt; chemical additives for use in reclaimed asphalt; chemical additives used in reclaimed asphalt; chemical additives used in modification of asphalt; chemical additives for reclaimed asphalt; chemical additives for use in modification of properties in hardened and aged asphalt; chemical compositions for asphalt; chemical additives for bitumen; chemical compositions for bitumen; chemical additives for use in road-making or road-repairs, in this class; chemical compositions for use in road-making or road-repairs, in this class; chemical compositions for use in the building industry; chemical products for use as additives for building materials; chemicals for use as additives in building materials (except paints); chemical compositions for use in the construction industry; chemical products for use in the manufacture of building materials