Conference Papers

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Subject: search.filters.subject.Alkaline solution

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    Effect of Curing Methods on the Artificial Production of Fly Ash Aggregates
    (Springer Science and Business Media Deutschland GmbH, 2021) Shivaprasad, K.N.; Das, B.B.; Krishnadas, S.
    The experimental investigation, provides the results on the artificially produced fly ash aggregates through the pelletization process, is presented in this paper. NaOH and Na2SiO3 were used as alkali activator as a binder. The composition of alkaline solution is maintained as 5% of Na2O and SiO2/Na2O ratio of 0.3 with respect to weight of fly ash used. The detailed investigation is carried out by varying the water content to identify the optimum dosage of water in the alkaline solution in the fly ash pelletization. Further, different methods of curing were investigated to check for the suitable curing method for the production of fly ash aggregate produced. Optimum water content and suitable curing method will be identified through efficiency of pelletization and aggregate properties. Grey relation analysis is performed on the experimental test results to identify the influence of curing method on the produced aggregates. From these results, it is clearly understood that the curing method has significantly improved produced aggregates. © 2021, Springer Nature Singapore Pte Ltd.
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    Utilization of Aluminium Refinery Residue (ARR), GGBS and Alkali Solution Mixes in Road Construction
    (Springer Science and Business Media Deutschland GmbH, 2023) Kudachimath, N.S.; Mulangi, R.H.; Das, B.B.
    Manufacturing and the construction industries are on the boom with the growing economy of the world. Aluminium and steel are produced in very large quantities compared to other metals. These industries also produce by-products that are either partially utilized or unutilized. Aluminium refinery residue (ARR) with its colour known as Redmud, produced from bauxite by Bayer process, because of its high pH demands huge storage land. In road construction, a large quantity of material is required at the lower layers. In the present work wastes from both industries are tried for reuse. Ground-granulated blast furnace slog (GGBS) from the iron and steel industry makes complex compounds with sodium silicate and sodium hydroxide to increase the strength properties of aluminium refinery residue (ARR) and is verified with basic laboratory experiments for strength and durability tests on stabilized aluminium refinery residue (ARR). Ground-granulated blast furnace slog (GGBS) of 20–30% is used to stabilize ARR, and cured for up to 28 days, and the result of the various mix has shown an increase in strength with curing periods. The highest UCS test result of 4.01 MPa was observed for 28 days cured sample. For durability tests, the treated specimens are passed through wet/dry cycle and freeze/thaw conditions for various curing periods. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.