This study of concrete strength versus curing time shows continuous curing of concrete beyond the usual few days (or even four weeks) results in higher compressive strength. Treatment with a colloidal-silica based finishing aid has a permanent effect on reducing evaporation, so it has the potential to extend curing indefinitely. Image courtesy The Concrete Manual, U.S. Department of the Interior’s Bureau of Reclamation (8th ed., 1975)
