Ordinary Portland cement (OPC) is one of the most widely used binders in building materials. However, OPC production is related with high CO2 emission and high energy consumption. Currently geopolymer cements are found to be the alternative substitute for OPC. Geopolymers most commonly are covalently bonded alkali-aluminosilicates which are X-ray amorphous at ambient and medium temperatures. The current study focusses on fly ash which is a byproduct of coal combustion process and due to its amorphous nature and chemistry, it is considered an appropriate raw material for geopolymer synthesis. In this study the effect of alkali concentration and solid liquid ratio on the acid resistance of fly ash based geopolymer mortar was studied. The fly ash was obtained from ayka Addis Textile, Addis Ababa, Ethiopia. Samples were prepared with different solid to liquid ratio and NaOH molarity and were tested for mechanical and durability properties. It was found that as the molarity of NaOH solution and solid to liquid ratio increase the initial and final setting time become shorter. Compressive and flexural strength show that after 28 days of curing sample with high Liquid to solid ratio and higher molarity show higher strength and smaller water absorption percentage. Sample were immersed in a 2% H2SO4 solution for 25 days and the sample with higher strength with smaller water absorption percentage show higher resistance.
| Published in | American Journal of Science, Engineering and Technology (Volume 4, Issue 4) |
| DOI | 10.11648/j.ajset.20190404.14 |
| Page(s) | 80-85 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2019. Published by Science Publishing Group |
Cement, Durability, Geopolymers, Fly Ash
| [1] | Sun, P., & Wu, H. C. (2013). Chemical and freeze-thaw resistance of fly ash-based inorganic mortars. Fuel, 111, 740–745. |
| [2] | Huntzinger, D. N., & Eatmon, T. D. (2009). A life-cycle assessment of Portland cement manufacturing: comparing the traditional process with alternative technologies. Journal of Cleaner Production, 17 (7), 668–675. http://doi.org/10.1016/j.jclepro.2008.04.007 |
| [3] | Pacheco-Torgal, F., Abdollahnejad, Z., Camões, a. F., Jamshidi, M., & Ding, Y. (2012). Durability of alkali-activated binders: A clear advantage over Portland cement or an unproven issue? Construction and Building Materials, 30, 400–405. http://doi.org/10.1016/j.conbuildmat.2011.12.017 |
| [4] | Xu, H., & Van Deventer, J. S. J. (2000). The geopolymerisation of alumino-silicate minerals. International Journal of Mineral Processing. |
| [5] | Prof. Dr. Joseph Davidovits. (2002). Environmentally Driven Geopolymer Cement Applications. Geopolymer 2002 Conference, (6), 1–9. |
| [6] | Machiels, L., Arnout, L., Jones, P. T., Blanpain, B., & Pontikes, Y. (2014). Inorganic polymer cement from fe-silicate glasses: Varying the activating solution to glass ratio. Waste and Biomass Valorization, 5 (3), 411–428. http://doi.org/10.1007/s12649-014-9296-5 |
| [7] | Topçu, İ. B., Toprak, M. U., & Uygunoğlu, T. (2014). Durability and microstructure characteristics of alkali activated coal bottom ash geopolymer cement. Journal of Cleaner Production, 81, 211–217. http://doi.org/10.1016/j.jclepro.2014.06.037 |
| [8] | Querol, X., Moreno, N., Umaa, J. C., Alastuey, A., Hernández, E., López-Soler, A., & Plana, F. (2002). Synthesis of zeolites from coal fly ash: an overview. International Journal of Coal Geology, 50 (1-4), 413–423. |
| [9] | Thokchom, S., Ghosh, P., & Ghosh, S. (2009). Effect of water absorption, porosity and sorptivity on durability of geopolymer mortars. Journal of Engineering and Applied Sciences, 4 (7), 28–32. |
| [10] | Bakharev, T. (2005). Durability of geopolymer materials in sodium and magnesium sulfate solutions. Cement and Concrete Research, 35 (6), 1233–1246. http://doi.org/10.1016/j.cemconres.2004.09.002 |
| [11] | Provis, J. L., & van Deventer, J. S. J. (2009). Geopolymers: structure, processing, properties and industrial applications. Boca raton Boston New York Washington, DC. http://doi.org/10.1533/9781845696382 |
| [12] | Pimraksa, K., P. Chindaprasirt, A. Rungchet, K. Sagoe-Crentsil, and T. Sato, Lightweight geopolymer made of highly porous siliceous materials with various Na2O/Al2O3 and SiO2/Al2O3 ratios. Materials Science and Engineering: A, 2011. 528 (21): p. 6616-6623. |
| [13] | Bakkali, H., M. Ammari, and I. Frar, NaOH alkali-activated class F fly ash: NaOH molarity, Curing conditions and mass ratio effect. Journal Materials Environment Science, 2016. 7: p. 397-401. |
| [14] | Xiao YuZhuang, Xiao Yu Zhuang, Liang Chen, Sridhar Komarneni d, Chun Hui Zhou, Dong Shen Tong, Hui Min Yang, Wei Hua Yu, Hao Wang, Fly ash-based geopolymer: clean production, properties and applications, journal of cleanrer production 125 (2016) 253-267. |
| [15] | Ahmer Ali Siyal, Khairun Azizi Azizli, Zakaria Man, Hafeez Ullah, Effects of Parameters on the Setting Time of Fly Ash Based Geopolymers Using Taguchi Method, 4th International Conference on Process Engineering and Advanced Materials, Procedia Engineering 148 (2016) 302–307. |
APA Style
Abel W. Ourgessa, Amen Aniley, Ababo G. Gudisa, Ibsa Neme, Alemshet Bekele. (2019). Effect of Alkaline Concentration and Solid Liquid Ratio on the Acid Resistance of Fly Ash Based Geopolymer Mortar. American Journal of Science, Engineering and Technology, 4(4), 80-85. https://doi.org/10.11648/j.ajset.20190404.14
ACS Style
Abel W. Ourgessa; Amen Aniley; Ababo G. Gudisa; Ibsa Neme; Alemshet Bekele. Effect of Alkaline Concentration and Solid Liquid Ratio on the Acid Resistance of Fly Ash Based Geopolymer Mortar. Am. J. Sci. Eng. Technol. 2019, 4(4), 80-85. doi: 10.11648/j.ajset.20190404.14
AMA Style
Abel W. Ourgessa, Amen Aniley, Ababo G. Gudisa, Ibsa Neme, Alemshet Bekele. Effect of Alkaline Concentration and Solid Liquid Ratio on the Acid Resistance of Fly Ash Based Geopolymer Mortar. Am J Sci Eng Technol. 2019;4(4):80-85. doi: 10.11648/j.ajset.20190404.14
Share This Article
Twitter
Linked In
Facebook
Copy
Download@article{10.11648/j.ajset.20190404.14,
author = {Abel W. Ourgessa and Amen Aniley and Ababo G. Gudisa and Ibsa Neme and Alemshet Bekele},
title = {Effect of Alkaline Concentration and Solid Liquid Ratio on the Acid Resistance of Fly Ash Based Geopolymer Mortar},
journal = {American Journal of Science, Engineering and Technology},
volume = {4},
number = {4},
pages = {80-85},
doi = {10.11648/j.ajset.20190404.14},
url = {https://doi.org/10.11648/j.ajset.20190404.14},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ajset.20190404.14},
abstract = {Ordinary Portland cement (OPC) is one of the most widely used binders in building materials. However, OPC production is related with high CO2 emission and high energy consumption. Currently geopolymer cements are found to be the alternative substitute for OPC. Geopolymers most commonly are covalently bonded alkali-aluminosilicates which are X-ray amorphous at ambient and medium temperatures. The current study focusses on fly ash which is a byproduct of coal combustion process and due to its amorphous nature and chemistry, it is considered an appropriate raw material for geopolymer synthesis. In this study the effect of alkali concentration and solid liquid ratio on the acid resistance of fly ash based geopolymer mortar was studied. The fly ash was obtained from ayka Addis Textile, Addis Ababa, Ethiopia. Samples were prepared with different solid to liquid ratio and NaOH molarity and were tested for mechanical and durability properties. It was found that as the molarity of NaOH solution and solid to liquid ratio increase the initial and final setting time become shorter. Compressive and flexural strength show that after 28 days of curing sample with high Liquid to solid ratio and higher molarity show higher strength and smaller water absorption percentage. Sample were immersed in a 2% H2SO4 solution for 25 days and the sample with higher strength with smaller water absorption percentage show higher resistance.},
year = {2019}
}
TY - JOUR T1 - Effect of Alkaline Concentration and Solid Liquid Ratio on the Acid Resistance of Fly Ash Based Geopolymer Mortar AU - Abel W. Ourgessa AU - Amen Aniley AU - Ababo G. Gudisa AU - Ibsa Neme AU - Alemshet Bekele Y1 - 2019/12/19 PY - 2019 N1 - https://doi.org/10.11648/j.ajset.20190404.14 DO - 10.11648/j.ajset.20190404.14 T2 - American Journal of Science, Engineering and Technology JF - American Journal of Science, Engineering and Technology JO - American Journal of Science, Engineering and Technology SP - 80 EP - 85 PB - Science Publishing Group SN - 2578-8353 UR - https://doi.org/10.11648/j.ajset.20190404.14 AB - Ordinary Portland cement (OPC) is one of the most widely used binders in building materials. However, OPC production is related with high CO2 emission and high energy consumption. Currently geopolymer cements are found to be the alternative substitute for OPC. Geopolymers most commonly are covalently bonded alkali-aluminosilicates which are X-ray amorphous at ambient and medium temperatures. The current study focusses on fly ash which is a byproduct of coal combustion process and due to its amorphous nature and chemistry, it is considered an appropriate raw material for geopolymer synthesis. In this study the effect of alkali concentration and solid liquid ratio on the acid resistance of fly ash based geopolymer mortar was studied. The fly ash was obtained from ayka Addis Textile, Addis Ababa, Ethiopia. Samples were prepared with different solid to liquid ratio and NaOH molarity and were tested for mechanical and durability properties. It was found that as the molarity of NaOH solution and solid to liquid ratio increase the initial and final setting time become shorter. Compressive and flexural strength show that after 28 days of curing sample with high Liquid to solid ratio and higher molarity show higher strength and smaller water absorption percentage. Sample were immersed in a 2% H2SO4 solution for 25 days and the sample with higher strength with smaller water absorption percentage show higher resistance. VL - 4 IS - 4 ER -
Information
Email: