Compressive Strength of Geopolymer Based on the Fly Ash Variation

Abstract:

. This study was conducted to determine the factors that may affect the compressive strength of fly ash-based geopolyme, manufactured using fly ash obtained from different power plants. Fly ash obtained from different sources may have very different characteristics that affect the properties of geopolymer product. The source of variations in the geopolymer properties from the view point of the source materials can be classified into internal and external factors. Internal factors include the physical and chemical properties of the fly ash, while external factors associated with mixture proportion of geopolymer and the manufacturing process. From the experimental results, it was found that the size of the fly ash granules, the CaO and MgO content, and the carbon content in fly ash are the internal factors that may affect the compressive strength of geopolymer. On the other hand, the ratio of sodium silicate to sodium hydroxide in the alkaline solution and the molarity of the sodium hydroxide solution are the external factors influencing the compressive strength of geopolymer.

• Periodical: Materials Science Forum (Volume 841)
• Pages: 98-103
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.841.98
• Online since: January 2016
• Authors: Antoni Antoni*, Stephen Wibiatma Wijaya, Djwantoro Hardjito
• Keywords: CaO Content, Fly Ash, Geopolymer, Specific Surface Area, Strength

References

[1] J. Davidovits, Geopolymer chemistry and applications, 2nd ed. Saint-Quentin, France: Institute Géopolymère, (2008).

[2] J. J. Ekaputri, K. A. Priadana, T. E. Susanto, and S. Junaedi, Physico-chemical characterization of fly ash, World Congr. Adv. Struct. Eng. Mech. Jeju, Korea, p.2988–2996, (2013).

[3] S. Kumar and R. Kumar, Mechanical activation of fly ash: effect on reaction, structure and properties of resulting geopolymer, Ceram. Int., vol. 37, no. 2, p.533–541, (2011).

DOI: 10.1016/j.ceramint.2010.09.038

[4] J. J. Ekaputri, U. M. Bahrul, R. Bayuaji, S. T. Eddy, M. M. Al Bakri, and M. I. Triwulan, A comprehensive characterization and determination of fly ashes in Indonesia using different methods, Appl. Mech. Mater., (2015).

DOI: 10.4028/www.scientific.net/amm.754-755.320

[5] T. Phoo-ngernkham, P. Chindaprasirt, V. Sata, and T. Sinsiri, High calcium fly ash geopolymer containing diatomite as additive, Indian J. Eng. Mater. Sci., vol. 20, no. 8, p.310–318, (2013).

DOI: 10.1007/s12613-013-0715-6

[6] Antoni, R. Gunawan and D Hardjito, Rapid Indicators in Detecting Variation of Fly Ash for Making HVFA Concrete, Appl. Mech. Mater. Vol. 815 (2015) pp.153-157.

DOI: 10.4028/www.scientific.net/amm.815.153

[7] M. Izquierdo and X. Querol, Leaching behaviour of elements from coal combustion fly ash: An overview, Int. J. Coal Geol., vol. 94, no. 5, p.54–66, May (2012).

DOI: 10.1016/j.coal.2011.10.006

[8] D. Hardjito and B. V. Rangan, Development and properties of low-calcium fly ash-based geopolymer concrete, Curtin University of Technology. Perth, Australia, (2005).

[9] ASTM C618, Standard specification for coal fly ash and raw or calcined natural pozzolan for use in conrete. ASTM International, (2003).

DOI: 10.1520/c0618-15

[10] L. U. Duyou, Z. Yanzeng, L. I. U. Yongdao, and X. U. Zhongzi, Effect of Light-burned Magnesium Oxide on Deformation Behavior of Geopolymer and its Mechanism, J. Chinese Ceram. Soc., vol. 40, no. 11, p.1625–1630, (2012).