Chemical additives for concrete; Chemical preparations for the treatment of cement; Chemical preparations for the treatment of concrete; Chemical additives for cement; Chemical products for use as additives to cement; Chemical products for use in bonding; Chemical products for use in the treatment of water; Coatings for waterproofing (chemicals); Coatings for weatherproofing (chemicals); Coatings to protect concrete from water (other than building materials, paints or oils); Compositions for accelerating the setting of concrete; Compositions for preserving concrete (except paints or oils); Compositions for setting cement; Concrete admixtures; Concrete bonding compounds; Concrete curing agents; Concrete hardening compounds; Concrete mixtures; Concrete preservatives, except paints and oils; Concrete-aeration chemicals; Curing additives; Curing preparations; Dispersing agents; Plasticisers; Plasticizers; Products for sealing concrete (other than paints and oils)