An investigation of sediment characterization was led along a stretch of the Thamiraparani Stream, Tamilnadu, India, during September, 2020 to assess the effect of anthropogenic actions. Ten locations were chosen from Authoor to Punnakayal for the examination. Sediments were analysed with ICP-OES instrument. From the obtained results (stated in mg/kg of dry weight) revealed that Fe wide-ranging from 1623.95 to 53003.83, Pb ranged between 0.02 to 0.3, Zn varies from 0.2 to 2.08, Cu from 0.02 to 0.83, Ni from 0.41 to 2.8, and Mn from 2.01 to 17.39. Assessed Pollution Load Index (PLI) and geo-accumulation index (Igeo) discovered the sediments at all places were almost not affected by metallic element. The obtained results were compared with heavy metal Guidelines for Sediments (EPA).
This project presents the experimental study on self-compacting concrete (SCC) with replacement of cement by various percentage of Silica Fume and Fly Ash. The main objective is to determine the Flexural strength, Compressive strength and Split tensile strength of Self compacting concrete by partial replacement of cement by Silica Fume and Fly Ash. The use of fly ash in concrete today is an important subject and is of growing importance day by day. Using fly ash in concrete many provide both economic advantages and enhanced properties in the production of concrete. The addition of super plasticizer increases the workability of concrete. The work involves making seven types of SCCs mixes. For each mix preparation, twenty-one cube specimens, twenty-one-cylinder specimens and twenty-one beam specimens are cast and cured. The specimens are cured in water for 7 days, 14 days and 21 days. The results show that SCC with 5% SF and 10% gives higher values of Compressive strength, Split Tensile strength and Flexural Strength compared to other percentages of Silica Fume and Fly Ash. According to the SCC result, various percentages of AR Glass Fiber (0.1% to 0.4%) added with the optimum SCC (5% of SF+ 10% of FA) and super plasticizer is mixed with optimum SCC. After each mix proportion, specimens are cast and cured for 28 days in water and hardened properties are determined. The results show that the higher the percentage of glass fiber, the higher the values of concrete Compressive strength, Split Tensile Strength and Flexural Strength.
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