Use of Treated Domestic Waste Water as Mixing Water in Cement Mortar

This study deals with the effect of treated domestic wastewater (TDWW) on properties of cement blended with 20% fly ash such as compressive strength, setting times and soundness. Water used for mortar includes portable water (PW), treated domestic wastewater (TDWW) and treated domestic wastewater (TDWW) partially replaced with portable water. This study analyses the quality of these types of waters as for standard methods for the examination of water and wastewater, APHA 1992. Then, tests were conducted on mortar. The setting times and soundness of blended cement with treated domestic wastewater (TDWW) and treated domestic wastewater (TDWW) partially replaced with portable water is as good as that with portable water. The compressive strength of blended cement mortar mixed with treated domestic wastewater and treated domestic wastewater partially replaced with portable water has very insignificantly affected. Therefore, it is suggested that treated domestic wastewater may be considered as mixing water for blended cement mortar where portable water resources are scarce. However, it is advised that long-term strength development and durability be studied before use.