Silver containing crosslinked polymers as admixture in cementitious compositions

A cementitious composition, preferably a concrete composition, a repair mortar, a repair paste, or a concrete coating composition, and wherein said cementitious composition comprises

• one or more cementitious material(s);
• preferably wherein said one or more cementitious material(s) is (are) selected from the group comprising cement, fly ash, ground granulated slag, limestone, latent hydraulic materials, pozzolanic materials, geopolymers and alkali activated materials, or any combination thereof;
• and,
• a silver-containing crosslinked polymer, wherein the crosslinked polymer is a covalently crosslinked polymer, and preferably wherein said silver-containing, crosslinked polymer comprises -A⊖Ag⊕ groups;
• wherein A⊖ is an anion, preferably a carboxylate anion (—COO⊖) or a sulphonate anion (—SO3⊖), and
• optionally, an aggregate;
• wherein the silver-containing, covalently crosslinked polymer comprises at least 2.0 weight % of silver ions, with wt % expressed as compared to the total weight of the (dry) silver-containing crosslinked polymer.