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2019_EJRNL_PP_KHUSHBOO_MEENA_1.pdf
Terbatas Lili Sawaludin Mulyadi
» ITB

Water is one of nature's precious gifts to humanity. It was the most common liquid with the highest usage of all liquids on the globe. This elixir of lives is a restricted natural resource. Hence, even a drop should not be wasted and now it's time for its systematic use. Construction industry requires a lot of water for infrastructure. Therefore, use of treated wastewater in construction industries is gaining grounds in so many countries of the world. The proper selection and processing of treated wastewater may be helpful in manufacturing concrete. This research aim was to find the possibility of the usage of treated wastewater in concrete as an alternative to potable water by conducting comprehensive laboratory investigations for a better understanding of mechanical and durability properties of treated wastewater concrete. The samples of water used were tertiary treated wastewater (TTWW), secondary treated wastewater (STWW) and tap water (TW). Compressive strength test, flexural strength test, chloride penetration resistance, carbonation resistance and abrasion resistance test were carried out for each concrete mixes. Tap water was replaced with treated wastewater to 100% by weight. In this study water to cement ratio was taken as 0.47. For compressive strength, concrete cubes for 7, 28 and 90 days were cast and for flexural strength beams were cast for 28 and 90 days as well as durability test was carried out after the 28 days. The results of compressive strength of concrete after replacement of 100% tap water with tertiary treated wastewater in concrete mixing as well as curing in tap water and tertiary wastewater is found to be in the range of 85–94% of normal concrete, which satisfies ASTM C-94 norms. The flexural strength of tertiary treated wastewater with tap water curing and tertiary treated wastewater with TTWW curing shows significant results as compared to control concrete. The depth of carbonation observed lower in control concrete as compare to all mixes. The experimental results indicated that the chloride concentration of concrete samples increased with a decrease in the quality of mixing water.