In particular the flow of mortar mixtures increased with increase of waste-water content up to 50% and then levelled
off when waste-water content exceeded 50%. Correspondingly,the flow of mortar mix with 100% wastewater replacement at water/cement ratio of 0.50 was found to be equivalent to that of the reference mortar mix with 100% potable water at water/cement ratio of 0.60, indicating potential use of de-inking waste-water as water reducing admixture.