Faculty Publications

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Author: search.filters.author.Shubhananda Rao, P.

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    Mine Waste Utilization
    (CRC Press, 2022) Ram Chandar, R.C.; Gayana, B.C.; Shubhananda Rao, P.
    This book is a comprehensive work on utilization of overburden waste, ash, tailings, and other processed waste produced by mining industry. It details various laboratory tests to identify the suitability of mine waste. It explains varied usage of different types of mine waste as in concrete pavements, bricks and to enhance fertile characteristics of waste lands. Various physico-mechanical properties of mine waste material and their optimum percentage for replacement with sand and coarse aggregate along with additives for optimum strength of concrete / bricks are discussed. Key features: Covers the technical approach in terms of testing and characterizing mine waste Focusses on effective use of mining waste to make sustainable and ecofriendly mining Presents analysis of physical properties of iron ore waste and their usage Describes testing methods for each type of mine waste and its physical property characterization for every application Includes detailed study to use iron ore waste and tailings in concrete pavements This book is aimed at researchers, professionals and graduate students in mining, geotechnical, and civil engineering. © 2022 Ram Chandar Karra, Gayana B.C and Shubhananda Rao P.
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    Utilization of Iron Ore Tailings in Bricks
    (CRC Press, 2022) Shubhananda Rao, P.; Ram Chandar, R.C.
    Brick is the most basic artefact and plays a very important role in the construction of buildings. The construction industry is in need of easily available, economically feasible and green materials, as there is a scarcity of naturally available river sand. Use of iron ore tailings (IOT) is found to be very beneficial, and the addition of perlite as an admixture to improve its thermal properties is given scope for the development of non-fired thermal efficient bricks. Bricks were made using different proportions, by replacing sand with IOT from 30% to 60% at 10% interval, cement from 10% to 20% at 5% interval and Perlite at 2% and 5% of 230 mm x 112.5 mm x 75 mm dimensions. Based on laboratory experiments, the optimum percentage of mix to make bricks consisting of IOT, sand, cement and perlite was found to be 50%, 25%, 20% and 5%, respectively. Based on the positive laboratory results, further a pilot-scale study was taken up with IOT-perlite bricks. Two model rooms, one with IOT-perlite bricks and the other with conventional bricks were constructed to assess the effectiveness of thermal conductivity. The study proved that eco-friendly bricks by using IOT will have lower thermal conductivity, better strength and will be lightweight in structure. © 2022 Ram Chandar Karra, Gayana B.C and Shubhananda Rao P.
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    Use of iron ore mine tailings in infrastructure projects
    (Inderscience Enterprises Ltd., 2019) Shubhananda Rao, P.; Gayana, B.C.; Ram Chandar, K.
    Utilisation of iron ore tailings in bricks as a replacement for sand will help in sustainable and greener development. The literature shows the potential use of iron ore tailings as a replacement of natural fine aggregates. As natural sand reserves are depleting day by day, there is a need for substitution for sand in bricks. A comprehensive overview of the published literature on the use of iron ore tailings and other industrial waste is being presented. The effects of various properties such as compressive strength, thermal conductivity and durability of bricks have been presented in this paper. © 2019 Inderscience Enterprises Ltd.
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    Development of energy efficient organic bricks in construction using IOT and perlite
    (Taylor and Francis Ltd., 2021) Shubhananda Rao, P.; Ram Chandar, K.R.
    The study focuses on improvement of bricks in mechanical properties, reduction of energy consumption, making more economical and environmentally friendly by saving the depleting resources. The bricks were mixed in different proportions, by replacing sand with Iron Ore Tailings from 30 to 60 percent at 10 percent interval, cement from 10 to 20 percent at 5 percent interval and perlite at 2 and 5 percent to make bricks of 230 mm×112.5 mm×75 mm dimensions. The bricks were tested for compressive strength, water absorption and thermal conductivity. From these tests among different combinations, IOTs:Sand:Cement:Perlite 50:25:20:5 combinations have yielded better results by satisfying Indian Standard (IS) codes and this is taken as optimum dosage of raw materials. Model rooms are constructed using these bricks to access the effectiveness of thermal conductivity to compare with the ordinary conventional brick (fired brick) room, both rooms are of the same dimension and exposed to same environmental conditions. Thermal conductivity is assessed by measuring the temperature on walls of all sides of the room at different timings of the day. The results revealed that heat transferred from the outside to inside of the walls of the model room constructed with IOT-perlite bricks was at least 2°C less compared with that of ordinary bricks. Lower thermal conductivity leads to energy savings and results established 8 percent of energy savings with IOT-perlite bricks. The study proved the eco-friendly bricks by using the mine waste, lower thermal conductivity, good strength and light weight in structure. © 2020 Informa UK Limited, trading as Taylor & Francis Group.