Optimizing the Properties of Metakaolin-based (Na, K)-Geopolymer Using Taguchi Design Method

Document Type : Original Article

Authors

Department of Ceramics Engineering and Building Materials, Faculty of Materials Engineering, University of Babylon, Babylon, Iraq

Abstract

Geopolymer paste is an innovative construction material which shall be produced by chemical action of inorganic molecules. It is a more environmentally friendly alternative to conventional Portland cement which is abundantly available worldwide. In this study, the influence of different alkaline activators (Na and K) on the mechanical and thermal behaviors of metakaolin-based geopolymer was investigated. The aims of this study is to find out the mixes and their process parameters, which are appropriate to produce Geopolymer paste with one of the highest compressive strength, highest - lowest porosity and highest- lowest initial and final setting time. Taguchi method is used in the design of the experiments for the metakaolin-based Geopolymer. Five factors were selected as process parameters that are more likely to affect the Geopolymer characteristics. These are the amount of Si, alkali type, alkali reagents ratio, mixing time, and water content. The effect of these parameters on the setting time, density, porosity, compressive strengths at 7 and 28 days. The results of study found that the Geopolymer paste with high compressive strength of (107.2MPa) can be obtained with the formula (0.2K2O.0.8Na2O. Al2O3. 3.6SiO2.xH2O) using proper processing condition in which the alkali silicates to the alkali hydroxides molar ratio should be kept in the range of 2.26. The results revealed that the use of alkali solution of K-ions and Na-ions improves the compressive strength of the geopolymer remarkably as compared with the use of Na-ions solution along. In addition, it has been noticed that the setting time is reduced, for geopolymers with silica content of less than 3.8, when K-ions is used. Similarly, the bulk density of geopolymers is found to be reduced by adding K-ions.

Keywords

References

 
1. Okonkwo, V., Onodagu, P. and Ubani, O., "An evaluation of
geopolymer cement in construction work",  e-ISSN: 2320-0847 
p-ISSN : 2320-0936. Vol. 8, No. 4, (2019), 58-66.
http://www.ajer.org/volume8issu4.html  
2. Gamil, Y., Bakar, I. and Ahmed, K., "Simulation and
development of instrumental setup to be used for cement grouting
of sand soil", Emerging Science Journal,  Vol. 1, No. 1, (2017),
16-27. 
3. Davidovits, J., "Geopolymers: Inorganic polymeric new
materials", Journal of Thermal Analysis and Calorimetry,  Vol.
37, No. 8, (1991), 1633-1656. 
4. Sedaghatdoost, A. and Amini, M., "Mechanical properties of
polyolefin fiber-reinforced light weight concrete", Civil
Engineering Journal,  Vol. 3, No. 9, (2017), 759-765. 
5. Emeka, A.E., Chukwuemeka, A.J. and Okwudili, M.B.,
"Deformation behaviour of erodible soil stabilized with cement
and quarry dust", Emerging Science Journal,  Vol. 2, No. 6,
(2018), 383-387. 
6. Duxson, P., Provis, J.L., Lukey, G.C., Mallicoat, S.W., Kriven,
W.M. and Van Deventer, J.S., "Understanding the relationship
between geopolymer composition, microstructure and
mechanical properties", Colloids and Surfaces A:
Physicochemical and Engineering Aspects,  Vol. 269, No. 1-3,
(2005), 47-58. 
7. Shihab, A.M., Abbas, J.M. and Ibrahim, A.M., "Effects of
temperature in different initial duration time for soft clay
stabilized by fly ash based geopolymer", Civil Engineering
Journal,  Vol. 4, No. 9, (2018), 2082-2096. 
8. Lima, F., Silva, F. and Thaumaturgo, C., "Xanes na borda-k do si
do sistema caulim-metacaulim-geopolímero", Revista Brasileira
de Aplicações de Vácuo,  Vol. 24, No. 2, (2008), 90-92. 
9. Palomo, A., Grutzeck, M. and Blanco, M., "Alkali-activated fly
ashes: A cement for the future", Cement and concrete research, 
Vol. 29, No. 8, (1999), 1323-1329. 
10. Van Jaarsveld, J., Van Deventer, J. and Lorenzen, L., "The
potential use of geopolymeric materials to immobilise toxic
metals: Part i. Theory and applications", Minerals engineering, 
Vol. 10, No. 7, (1997), 659-669. 
11. Liew, Y.-M., Heah, C.-Y. and Kamarudin, H., "Structure and
properties of clay-based geopolymer cements: A review",
Progress in Materials Science,  Vol. 83, (2016), 595-629. 
12. Dar, A.A. and Anuradha, N., "An application of taguchi l9
method in black scholes model for european call option",
International Journal of Entrepreneurship,  (2018).
https://www.abacademies.org/…/an-application-of-taguchi-l9- 
13. Al-Jabar, A.J.A., Al-Dujaili, M.A.A. and Al-Hydary, I.A.D.,
"Prediction of the physical properties of barium titanates using an
artificial neural network", Applied Physics A,  Vol. 123, No. 4,
(2017), 274. 
14. Al-dujaili, M.A.A., Al-hydary, I.A.D. and Al Jabar, A.J.A.,
"Optimization of the physical properties of barium titanates using
a genetic algorithm approach", Journal of the Australian
Ceramic Society,  Vol. 53, No. 2, (2017), 673-686. 
15. Cioffi, R., Maffucci, L. and Santoro, L., "Optimization of
geopolymer synthesis by calcination and polycondensation of a
kaolinitic residue", Resources, Conservation and Recycling, 
Vol. 40, No. 1, (2003), 27-38. 
16. Phair, J. and Van Deventer, J., "Effect of silicate activator ph on
the leaching and material characteristics of waste-based inorganic 
polymers", Minerals Engineering,  Vol. 14, No. 3, (2001), 289304.
17. Sofi, M., Van Deventer, J., Mendis, P. and Lukey, G.,
"Engineering properties of inorganic polymer concretes (ipcs)",
Cement and concrete research,  Vol. 37, No. 2, (2007), 251-257. 
18. Cheng, T.-W. and Chiu, J., "Fire-resistant geopolymer produced
by granulated blast furnace slag", Minerals engineering,  Vol. 16,
No. 3, (2003), 205-210. 
19. Rao, S.R. and Padmanabhan, G., "Application of taguchi methods
and anova in optimization of process parameters for metal
removal rate in electrochemical machining of al/5% sic
composites", International Journal of Engineering Research
and Applications (IJERA),  Vol. 2, No. 3, (2012), 192-197. 
20. Barbosa, V.F., MacKenzie, K.J. and Thaumaturgo, C., "Synthesis
and characterisation of materials based on inorganic polymers of
alumina and silica: Sodium polysialate polymers", International
Journal of Inorganic Materials,  Vol. 2, No. 4, (2000), 309-317. 
21. Song, X., Marosszeky, M., Brungs, M. and Munn, R., "Durability
of fly ash based geopolymer concrete against sulphuric acid
attack", in International Conference on Durability of Building
Materials and Components. Vol. 10, (2005). 
22. Reddy, B.S.K., Varaprasad, J. and Reddy, K.N.K., "Strength and
workability of low lime fly-ash based geopolymer concrete",
Indian Journal of Science and Technology,  Vol. 3, No. 12,
(2010), 1188-1189. 
23. Nath, P. and Sarker, P.K., "Effect of ggbfs on setting, workability
and early strength properties of fly ash geopolymer concrete cured
in ambient condition", Construction and Building Materials, 
Vol. 66, (2014), 163-171. 
24. Albitar, M., Ali, M.M., Visintin, P. and Drechsler, M., "Effect of
granulated lead smelter slag on strength of fly ash-based
geopolymer concrete", Construction and Building Materials, 
Vol. 83, (2015), 128-135. 
25. Risdanareni, P., Puspitasari, P., Kartika, D. and Djatmika, B.,
"Mechanical properties of geopolymer paste with fly ash
variation", in AIP Conference Proceedings, AIP Publishing LLC.
Vol. 1778, (2016), 030025. 
26. Malkawi, A.B., Nuruddin, M.F., Fauzi, A., Almattarneh, H. and
Mohammed, B.S., "Effects of alkaline solution on properties of
the hcfa geopolymer mortars", Procedia Engineering,  Vol. 148,
(2016), 710-717. 
27. Lizcano, M., Kim, H.S., Basu, S. and Radovic, M., "Mechanical
properties of sodium and potassium activated metakaolin-based
geopolymers", Journal of Materials Science,  Vol. 47, No. 6,
(2012), 2607-2616.   
 
 
International Journal of Engineering
Volume 33, Issue 4
TRANSACTIONS A: Basics
April 2020
Pages 631-638

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