English

Abstract
The present consumption of potable water for concrete production creates indirectly a great burden of cost, especially these days in light of the global water crisis which is summarized in a great demand on water against the limited resources. This Project was conducted to study the feasibility of usage of treated waste water in concrete production, in an attempt to provide tap water for other purposes and so to reduce the total cost of concrete production.
In this research, water samples were taken from the effluent of Al-Tireh (MBR)Treatment Plant, Al-Bireh (EA) Treatment Plant, Al-Quds University(RO) Treatment Plant, in addition to the wastewater samples at Biologically treated wastewater, MBR treated wastewater, and effluent of Al-Tireh Treatment Plant as a second phase in the research, all specimens were tested and then used as mixing water in concrete production. The resulted concrete tests were in comparison with the potable water-mixed concrete. Compressive strength, slump, setting time, air content, permeability, and specific gravity were tested to all concrete mixtures. All tests in this research made taking into consideration the criteria and requirements of the standard specifications of the ASTM.
The compressive strength was 281, 299, 286, 288 at 7 days, 394, 394, 392, 380kg/cm2at 28 days, and 417, 413, 416, 402 kg/cm2at 56 days for potable water, Al-Bireh treated wastewater, Al-Tireh treated wastewater, Al-Quds University treated wastewater respectively. With a values of 258, 311, 288, 282 kg/cm2at 7 days, 358, 410, 391, 390 kg/cm2at 28 days, 377, 425, 408, 403 kg/cm2at 56 days for potable water, Biologically treated wastewater, MBR treated wastewater, and the effluent respectively. The slump values were 123, 119, 127, and 125 mm for potable water, Al-Bireh treated wastewater, Al-Tireh treated wastewater, and Al-Quds University treated wastewater respectively. With values of 123, 137, 132, 132 mm for potable water, biologically treated wastewater, MBR treated wastewater, and the effluent respectively. The initial setting time was 4:50, 4:50, 5:00, 5:50 hours for potable water, Al-Bireh treated wastewater, Al-Tireh treated wastewater, and Al-Quds University treated wastewater respectively. And 4.5, 6.0, 5.0, 4.5hours for potable water, biologically treated wastewater MBR treated wastewater, and the effluent respectively.
On the other hand the final setting time was 8:50, 8:30, 8:40, and 8:35 hours for potable water, biologically treated wastewater, MBR treated wastewater, and the effluent respectively, and 8:50, 8:30, 8:40, and 8:35 hours for potable water, Al-Bireh treated wastewater, Al-Tireh treated wastewater, and Al-Quds University treated wastewater respectively. The permeability was 3, 2, 2, 3 mm for potable water, Al-Bireh treated wastewater, Al-Tireh treated wastewater, and Al-Quds University treated wastewater respectively. And 3, 1, 2, 2 mm for potable water, biologically treated wastewater, MBR treated wastewater, and the effluent respectively. The specific gravity values were 2.40, 2.40, 2.42, 2.41for potable water, Al-Bireh treated wastewater, Al-Tireh treated wastewater, and Al-Quds University treated wastewater respectively. And 2.40, 2.42, 2.42, 2.41 for potable water, biologically treated wastewater, MBR treated wastewater, and the effluent respectively. Finally the percent of air content was measured, values were 03:1%, 1:50%, 1:40%, 1:20% for potable water, Al-Bireh treated wastewater, Al-Tireh treated wastewater, and Al-Quds University treated wastewater respectively, and 1:30%, 1:10%, 1:10%,
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1:40%for potable water, biologically treated wastewater, MBR treated wastewater, and the effluent respectively.
Comparing tests results of the treated waste water with potable water, the results were all within the tolerable limits, according to ASTM standards. The research shows that treated waste water can be used successfully in preparing concrete at various used treating techniques or either treating stages.

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