Effects of Bituminous Coal Ash Addition in Pottery Products

Abstract:

Bituminous coal ash, fly ash (FA) and bottom ash (BA), from coal power plant were studied in this research for utilizations in ceramic and pottery industries. Both fly ash and bottom ash mixed with four different ball clays from two kinds of ceramic pottery products such as flowerpot and construction brick, Ratchaburi, Chantaburi, Angthong and Chonburi ball clay. The mixtures were varying ratio between ashes and clays depend on clay sources. After mixing, the bodies were formed to test pieces and were then fired at 800-1200 °C. The results indicated that, added fly ash 0-40 wt% significantly decreased water absorption and increased bending strength when fired at 1150 °C or above. For color effect, CIE L*a*b* color space, both fly ash and bottom ash revealed the samples less lightness, more red and yellow appearance. These results are obvious when fired at 1150 ^oC or above. Following the results, fly ash is possible to be used in ceramic pottery industries replaced with other addition such as sand and pottery stone.

• Periodical: Key Engineering Materials (Volume 798)
• Pages: 242-247
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.798.242
• Online since: April 2019
• Authors: Yannawut Wonghom*, Siripan Nilpairach, Charusporn Mongkolkachit, Thanataon Pornphatdetaudom, Thanakorn Wasanapiarnpong
• Keywords: Bituminous Coal Ash, Bottom Ash, Fly Ash, Pottery

References

[1] M. Rasul, Thermal Power Plants - Advanced Applications, InTech, Croatia, (2013).

[2] Electricity Generating Authority of Thailand, The proportion of electricity used in EGAT's electricity generation in 2017, available online at: https://www.egat.co.th/index.php.

[3] Y. Yurum, New Trends in Coal Science, Kluwer Academic Publisher, Datça, Turkey, (1987).

[4] C. D. Hardin et al., Operations and Maintenance Guidelines for Coal Ash Landfills, World of Coal Ash Conference 2011, available online at: http://www.flyash.info/2011/127-Hardin-2011.pdf.

[5] S. Torrey, Coal Ash Utilization Fly ash, Bottom Ash and Slag, Noyes Data Corporation, New Jersey, United States, (1987).

[6] D. Eliche-Quesada, J. Leite-Costa, Use of bottom ash from olive pomace combustion in the production of eco-friendly fried clay bricks, Waste management. 48 (2016) 323-333.

DOI: 10.1016/j.wasman.2015.11.042

[7] Z. Haiying, Z. Youcai, Q. Jingyu, Study on use of MSWI fly ash in ceramic tile, Journal of Hazardous Materials. 141 (2007) 106-114.

DOI: 10.1016/j.jhazmat.2006.06.100

[8] E. Aydin, Novel Coal bottom ash waste composites for sustainable construction, Construction and Building Materials. 124 (2016) 582-588.

DOI: 10.1016/j.conbuildmat.2016.07.142

[9] S. Naganathan et al., Performance of bricks made using fly ash and bottom ash, Construction and Building Materials. 96 (2015) 576-580.

DOI: 10.1016/j.conbuildmat.2015.08.068

[10] S. Abbas et al., Production of sustainable clay bricks using waste fly ash : Mechanical and durability properties, Journal of Building Engineering. 14 (2017) 7-14.

DOI: 10.1016/j.jobe.2017.09.008

[11] C. Leiva et al., Characteristics of fired bricks with co-combustion fly ashes, Journal of Building Engineering. 5 (2016) 114-118.

DOI: 10.1016/j.jobe.2015.12.001

[12] H. Wang et al, Synthesis of a ceramic tile base based on high-alumina fly ash, Construction and Building Materials. 155 (2017) 930-938.

DOI: 10.1016/j.conbuildmat.2017.07.049

[13] K. Wesche, Fly ash in concrete properties and performance, E&FN SPON, Great Britain, (1991).