However, this research work was aimed at determining the chemical and physical properties of BLA, workability properties of fresh concrete, the specific gravity, bulk densities and compressive strength of the hardened concrete under uniaxial compressive load. It is clearly seen that river sand has the higher compressive strength than that of the gutter sand.Īs a result of the rising cost of building materials, it has become necessary to search for the affordable and cheaply obtainable material which might be partially replaced cement in the production of concrete. It is observe that the compressive strength of the concrete cube of river sand and gutter sand are dependent on their different masses, density and crushed load level. Prior to aging of the concrete cubes on the 28 th day river sand increased to 27.6N/mm 2. At 14 days, the average compressive strength of river sand increased to 27.5N/mm 2 that of gutter sand also increased to 26.3N/mm 2. On curing at 7 days the result obtained showed that the average compressive strength of river sand is 25.5N/mm 2 while average compressive strength of gutter sand is 22.6N/mm 2. The compressive strength of river sans and gutter sand specimen varied according to their different curing days. Compressive strength of concrete is one of the most important and useful properties of concrete. The cubes were compacted in three layers of 50mm each and cured for 7, 14, 21, 28 days, which they were crashed to determine their compressive strength. During casting, mixed proportion of 1:2:4 was adopted and water/cement ration of 6.5% was adopted too. 35 strokes of the compaction rod were used for the (150mm x 150mm x 150mm) cubes. In the moulding of the specimen compaction was hand. In this research, two different fine aggregate (river sand and gutter sand) was used. This research work focuses and gives an overview of " comparing the compressive strength of concrete mixed using different fine aggregate ". It was observed from the experiment that the use of wastewater was adoptable to the concrete in terms of concrete strength. Also various tests performed on wastewater to know the values of pH which was found to be 6.93, total suspended solid (normality= 60mg/l), total dissolved solid (normality= 680mg/l), total alkalinity was found to be 0mg/l using phenolphthalein indicator & 5.3mg/l after using methyl orange indicator in same sample, total hardness (normality= 0.9 mg/l). The tensile strength was found to be 3.92MPa (100% tap water), 3.82MPa (50% tap water + 50% wastewater), 3.34MPa (100% wastewater) and the flexural strength was 4.07MPa (100% tap water), 3.35MPa (50% tap water + 50% wastewater), 2.72MPa (100% wastewater). The cube strength (compressive) after 7 days was found to be 37.678MPa (100% tap water), 30.257MPa (50% tap water + 50% wastewater), 27.5MPa (100% wastewater) and after 28 days it was found to be 46.467MPa (100% tap water), 39.397MPa (50% tap water + 50% wastewater), 35.92MPa (100% wastewater). of cylinder (300mm height and 150mm inner diameter), and 9 no, of prism (500mmX100mmX100mm). Tests conducted by 100% and 50% replacing the tap water with wastewater in concrete mixture. In this study, wastewater collected from three different car washing stations was used as a replacement of tap water in order to study the concrete compressive, flexural and tensile strength. It was shown certain properties of concrete have been improved and there is no adverse effect to the concrete quality. It was found that the use of wastewater in the concrete mix is possible. Therefore, new alternative to recycle and reuse the wastewater was adopted in this study to avoid the environmental problem and wastage. In order to reduce the tap water consumption, wastewater can be used as substitute in concrete mixture. The usage of tap water is getting more intense with the advanced development in manufactory industry included in concrete ready mix plant. The present investigation considers the effect of wastewater on high strength concrete.
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