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2019 | OriginalPaper | Buchkapitel

An Investigation of the Geotechnical Properties of Coal Combustion By-products from Matimba Power Station in Lephalale, South Africa

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Abstract

The production of electricity by burning coal produces huge amount of fly ash and bottom ash; hence, with the increase in the quantum of the thermal power generation, the production of the fly ash also rises to the top. The hanging of the by-product of the coal is considered to be the problematic issue at Matimba power station. The objectives of this investigation were to investigate the geotechnical properties of fly and bottom ash to establish their possible utilisation as a construction material, to determine the grain size distribution, therefore, to analyse the consistency of coal fly ash and bottom ash and perform comparative analysis of the geotechnical properties for suitability of the material as a building material, as well as to identify geotechnical constraints that may have an adverse effect on the project. The methodology used included preliminary studies, reconnaissance survey, soil sampling and laboratory tests. This involved determination of Atterberg limits, sieve analysis, moisture content and soil classification. Results of the laboratory tests indicate that the material of coal fly ash is mainly clay, while bottom ash is mainly silty. The coal fly ash was found to have low plasticity, low liquid limit as well as low plasticity index with low moisture content. The bottom ash on the other hand had considerable plastic limit and liquid limit with high moisture content. The plastering sand was determined to have low plastic limit, considerable liquid limit with low plasticity index. In comparison with the mixture of ashes with plastering sand, the material can be used as plastering material for building purposes.

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Literatur
Zurück zum Zitat Dilip, K., Neetesh, K., Ashish, G.: Geotechnical properties of fly ash and bottom ash mixtures in different proportions. Int. J. Sci. Res. (IJSR), 1487–1488 (2012) Dilip, K., Neetesh, K., Ashish, G.: Geotechnical properties of fly ash and bottom ash mixtures in different proportions. Int. J. Sci. Res. (IJSR), 1487–1488 (2012)
Zurück zum Zitat Eskom Integrated Report: The impact of coal ashes, South Africa, Limpopo, pp.80 (2015) Eskom Integrated Report: The impact of coal ashes, South Africa, Limpopo, pp.80 (2015)
Zurück zum Zitat Pandian, N.S.: Fly ash characterization with reference to geotechnical applications. J. Indian Inst. Sci. 84, 189–216 (2004) Pandian, N.S.: Fly ash characterization with reference to geotechnical applications. J. Indian Inst. Sci. 84, 189–216 (2004)
Zurück zum Zitat Thomas, M.: Optimising the Use of Fly Ash in Concrete, p. 2. Portland Cement Associate, Skokie, IL (2007) Thomas, M.: Optimising the Use of Fly Ash in Concrete, p. 2. Portland Cement Associate, Skokie, IL (2007)
Zurück zum Zitat Vijaya Sekhar Reddy, M., Ashalatha, K., Sasi, K.: Strength properties of ternary blended concrete by alccofine bottom ash replacement in cement and blast furnace slag in fine aggregate. Int. J. Eng. Res. Technol. 2, 112 (2016) Vijaya Sekhar Reddy, M., Ashalatha, K., Sasi, K.: Strength properties of ternary blended concrete by alccofine bottom ash replacement in cement and blast furnace slag in fine aggregate. Int. J. Eng. Res. Technol. 2, 112 (2016)
Metadaten
Titel
An Investigation of the Geotechnical Properties of Coal Combustion By-products from Matimba Power Station in Lephalale, South Africa
verfasst von
L. Magunde
F. Sengani
T. Zvarivadza
Copyright-Jahr
2019
DOI
https://doi.org/10.1007/978-3-319-99903-6_12