Contemporary Issues Related to Utilization of Industrial Byproducts

Kuntikana, Ganaraj; Singh, Devendrá

doi:10.1520/acem20160050

Cited by 19 publications

(9 citation statements)

References 135 publications

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“…For construction industry, the development and use of industrial and agricultural wastes, such as fly ash, blast furnace slag, metakaolin, rice husk ash (RHA), and bagasse ash (BA), are rapidly receiving attention as reviewed in many literatures [1][2][3]. e use of ashes by the grinding process in cement concrete generally improves the properties of concrete.…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Rice Husk Ash as Cementitious Material in High-Strength Cement-Admixed Clay

Jongpradist

Homtragoon

Sukkarak

et al. 2018

Advances in Civil Engineering

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e potential and efficiency of using rice husk ash (RHA) to add up or partially replace Portland cement in deep cement mixing technique are examined. A series of unconfined compression tests on cement-RHA-stabilized clay are conducted to investigate the influence of RHA on the mixture properties. Special attention is paid to its efficiency for increasing the strength by partial cement replacement to obtain high-strength soil cement, and it is compared with fly ash. Test results indicate that up to 35% of RHA could be advantageously added up to enhance the strength if the cement content in the mixture is larger than 10%. e RHA enhances the strength of cement-admixed clay by larger than 100% at 28 days. For curing time of 14 and 28 days, the RHA exhibits higher efficiency on Portland cement replacement when the cement and overall cementitious contents are not less than 20 and 35%, respectively. e optimum condition for high-strength mixture is achieved when RHA is added to the 20% cement content mixture. When compared with fly ash of similar grain size, the efficiency of RHA is higher when the content to be added is greater than 15%. is indicates the suitability of RHA for use in high-strength soil-cement.

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Section: Introductionmentioning

confidence: 99%

Efficiency of Rice Husk Ash as Cementitious Material in High-Strength Cement-Admixed Clay

Jongpradist

Homtragoon

Sukkarak

et al. 2018

Advances in Civil Engineering

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“…Many researches are carried out on utilizing of industrial waste/agricultural waste such as fly ash, corn cob ash, metakaolin, bagasse ash and RHA during past two decades such as [23][24][25][26]. Rice Husk is also utilised in clay to increase the unconfined compressive strength.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Recycled Concrete Aggregates with Rice Husk Ash as Partial Cement Replacement

et al. 2018

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Concrete is highly utilized construction material around the globe and responsible for high depreciation of the raw materials. Consumption of this material in construction industry is arching upward day by day. On the other hand, debris of demolished concrete structures are being dumped as waste. For developing countries such waste is not a good sign and need its proper utilization by recycling it into useful product. In this consequence, this study is an attempt to utilize demolished waste concrete by converting into coarse aggregates. This research was conducted on recycled cement concrete aggregates of demolished structures and Rice Husk Ash (RHA). The purpose of this experimental study is to analyze the mechanical properties of concrete; when cement is partially replaced with RHA and natural aggregates by recycled aggregates (RA). In this study, the cement was replaced by RHA up to 10% by weight of cement. For experimental purpose, total 135 concrete specimens were prepared, cured and tested in Universal Testing Machine (UTM). Finally, laboratory results were compared in terms of compressive and splitting tensile strength made with normal and recycled coarse aggregates. All the specimens were prepared at 1:1.5:3 with 0.50 w/c ratio and tested at 7, 14, 21, 28 and 56 days curing ages. It is observed from experimental analysis that the workability of fresh normal concrete is 7% and 10% greater than recycled aggregates concrete blended with 10% RHA and only recycled aggregates concrete without RHA respectively. The compressive strength increases up to 6%, whilst splitting tensile strength increases 4% at 56 days curing, when the cement is replaced 10% by RHA. It is, further, concluded that with more than 10% RHA replacement with cement, the compressive strength decreases. This study would help the construction experts to use such wasted concrete into useable production of new concrete projects.

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“…Conventional practice is to discharge the slurry of the BRs in the lagoons and recovering/decanting the caustic. However, this practice might become a potential source of contamination of the ecosystem, due to spillage of the BRs and leachate migration into the surroundings (Kuntikana and Singh, 2017). This situation has been instrumental in alumina refineries changing the practice related to the disposal and storage of the BRs.…”

Section: Introductionmentioning

confidence: 99%

“…In this context, organic and inorganic acids, synthetic solutions, chemicals, (sea)water, and bioremediation have been researched by earlier researchers (Jayanthi and Singh, 2016;Rai et al, 2012). However, these technologies do not appear to be feasible for the heaps of BRs due to various impediments or lack of initiatives (Kuntikana and Singh, 2017).…”

Section: Introductionmentioning

confidence: 99%

Neutralization of bauxite residues by gas purging

Kuntikana

Singh

Kapuri³

2021

JGS Special Publication

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The utilization of industrial byproducts, IBPs, for creating huge infrastructure projects (viz., land reclamation, rehabilitation of low-lying areas, backfilling of mines and construction of embankments, etc.), is being hypothesized to address the issues related with the sustainability. One of such IBPs are the bauxite residues, BRs, which get generated at alumina refineries; either in the slurry form or cakes coming out of the filter press, has been stacked at industrial premises, in the form of heaps or dumps. Ideally, the BRs can be utilized for the above-mentioned projects, provided they are suitably 'neutralized' to bring down their pH. Though, at this stage, it appears to be a 'distant dream', successful demonstration of such a philosophy would be a game-changer for the alumina refineries and the infrastructure sector, in general. In lieu of this, different techniques for neutralizing the BRs by using various chemicals, (sea)water, and bacteria have been adopted in the past. However, another interesting strategy to neutralize the magnanimous quantity of BRs stacked could be through purging CO2 that needs to be investigated in detail. With this in view, and to investigate the technical feasibility of CO2 purging in the BRs in their semi-solid state, a setup NeGaPur (connoting to the Neutralization by Gas Purging) that simulates BRs-gas interaction in the laboratory conditions has been adopted and its details are presented in this paper.

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Contemporary Issues Related to Utilization of Industrial Byproducts

Cited by 19 publications

References 135 publications

Efficiency of Rice Husk Ash as Cementitious Material in High-Strength Cement-Admixed Clay

Efficiency of Rice Husk Ash as Cementitious Material in High-Strength Cement-Admixed Clay

Experimental Study on Recycled Concrete Aggregates with Rice Husk Ash as Partial Cement Replacement

Neutralization of bauxite residues by gas purging

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