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Volume :30 Issue : 1 2003      Add To Cart                                                                    Download

Use of treated wastewater for concrete mixing in Kuwait

Auther : IBRAHIM AL-GHUSAIN AND MOHAMMAD J. TERRO

 Civil Engineering Department, Kuwait University, P.O.Box 5969 Safat, 13060 Kuwait Corresponding Author, Fax: + 965-4841603,  E-mail:  ghusain@civil.kuniv.edu.kw

 ABSTRACT

The suitability of using treated wastewater for mixing concrete was experimentally evaluated. Concrete cube specimens were cast using tap water (TW), preliminary treated wastewater (PTWW), secondary treated wastewater (STWW), and tertiary treated wastewater (TTWW) obtained from the local Reqqa wastewater treatment plant.

The type of water used for mixing did not affect concrete slump and density. However, setting times were found to increase with deteriorating Water quality. PTWW and STWW were found to have the most effect on retarding setting time. Concrete made with PTWW and STWW showed lower strengths (i.e., slower strength development) for ages up to 1 yr. At early concrete ages of 3 and 7 days, the strength of concrete made with TTWW was higher than that of concrete made with TW. The possibility of steel corrosion increased with the use of STWW and PTWW, especially when a thinner cover to the reinforcing steel was used. In summary, tertiary treated wastewater, of the type produced from wastewater treatment plants in Kuwait, is found to be suitable for mixing concrete with no adverse effects.

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