The Effect of Alkaline Activator Types on Strength and Microstructural Properties of Geopolymer from Co-Combustion Residuals of Bamboo and Kaolin

Aprilina Purbasari; Tjokorde Walmiki Samadhi; Yazid Bindar

doi:10.22146/ijc.26534

The Effect of Alkaline Activator Types on Strength and Microstructural Properties of Geopolymer from Co-Combustion Residuals of Bamboo and Kaolin

https://doi.org/10.22146/ijc.26534

Aprilina Purbasari^(1*), Tjokorde Walmiki Samadhi⁽²⁾, Yazid Bindar⁽³⁾

(1) Chemical Engineering Program, Bandung Institute of Technology, Jl. Ganesha No. 10, Bandung 40132, Indonesia Chemical Engineering Department, Diponegoro University, Jl. Prof. Soedarto, Kampus Tembalang, Semarang 50275, Indonesia
(2) Chemical Engineering Program, Bandung Institute of Technology, Jl. Ganesha No. 10, Bandung 40132, Indonesia
(3) Chemical Engineering Program, Bandung Institute of Technology, Jl. Ganesha No. 10, Bandung 40132, Indonesia
(*) Corresponding Author

Abstract

Geopolymer as a Portland cement substitute had been synthesized from alkaline activation of co-combustion residuals of bamboo and kaolin. Types of used alkaline activators were NaOH solution, KOH solution, a mixture of NaOH solution-water glass, and a mixture of KOH solution-water glass. Geopolymer with NaOH solution as activator had a compressive strength which was higher compared to geopolymer with KOH solution as an activator. However, geopolymer with NaOH solution-water glass as activator had a compressive strength which was lower compared to geopolymer with KOH solution-water glass as activator either at room temperature curing or at a curing temperature of 60 °C. The use of water glass with NaOH or KOH solution as activator could increase the compressive strength of geopolymer and yielded geopolymer having more dense and more homogeneous microstructure seen from SEM images. XRD patterns revealed the presence of sodium aluminosilicate hydrate in geopolymer with NaOH solution and NaOH solution-water glass as activators, and potassium aluminosilicate hydrate in geopolymer with KOH solution and KOH solution-water glass as activators. Furthermore, FTIR spectra indicated asymmetrical vibration of Si(Al)-O at around 1008 cm^-1 related to geopolymer product.

Keywords

alkaline activator; bamboo; cement; geopolymer; kaolin

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References

[1] Davidovits, J., 1991, Geopolymers: Inorganic polymeric new materials, J. Therm. Anal. Calorim., 37 (8), 1633–1656.

[2] Davidovits, J., 2008, Geopolymer: Chemistry and applications, 2^nd ed., Institut Géopolymère, Saint-Quentin.

[3] Imbabi, M.S., Carrigan, C., and McKenna, S., 2012, Trends and developments in green cement and concrete technology, Int. J. Sustainable Built Environ., 1 (2), 194–216.

[4] Khale, D., and Chaudhary, R., 2007, Mechanism of geopolymerization and factors influencing its development: A review, J. Mater. Sci., 42 (3), 729–746.

[5] van Deventer, J.S.J., Provis, J.L., and Duxson, P., 2012, Technical and commercial progress in the adoption of geopolymer cement, Miner. Eng., 29, 89–104.

[6] Kim, Y.Y., Lee, B.J., Saraswathy, V., and Kwon, S.J., 2014, Strength and durability performance of alkali-activated rice husk ash geopolymer mortar, Sci. World J., 2014, 209584, 1–10.

[7] Rajamma, R., Labrincha, J.A., and Ferreira, V.M., 2012, Alkali activation of biomass fly ash–metakaolin blends, Fuel, 98, 265–271.

[8] Salih, M.A., Ali, A.A.A., and Farzadnia, N., 2014, Characterization of mechanical and microstructural properties of palm oil fuel ash geopolymer cement paste, Constr. Build. Mater., 65, 592–603.

[9] Purbasari, A., Samadhi, T.W., and Bindar, Y., 2016, Thermal and ash characterization of Indonesian bamboo and its potential for solid fuel and waste valorization, Int. J. Renewable Energy Dev., 5 (2), 95–100.

[10] ASTM C109M, 2007, Standard test method for compressive strength of hydraulic cement mortars (using 2-in. or [50-mm] cube specimens), ASTM International, West Conshohocken.

[11] Fletcher, R.A., MacKenzie, K.J.D., Nicholson, C.L., and Shimada, S., 2005, The composition range of aluminosilicate geopolymers, J. Eur. Ceram. Soc., 25 (9), 1471–1477.

[12] Yao, X., Zhang, Z., Zhu, H., and Chen, Y., 2009, Geopolymerization process of alkali–metakaolinite characterized by isothermal calorimetry, Thermochim. Acta, 493 (1-2), 49–54.

[13] Panagiotopoulou, Ch., Kontori, E., Perraki, Th., and Kakali, G., 2007, Dissolution of aluminosilicate minerals and by-products in alkaline media, J. Mater. Sci., 42 (9), 2967–2973.

[14] Sindhunata, Provis, J.L., Lukey, G.C., Xu, H., and van Deventer, J.S.J, 2008, Structural evolution of fly ash based geopolymers in alkaline environments, Ind. Eng. Chem. Res., 47 (9), 2991–2999.

[15] van Jaarsveld, J.G.S., and van Deventer, J.S.J., 1999, Effect of the alkali metal activator on the properties of fly ash-based geopolymers, Ind. Eng. Chem. Res., 38 (10), 3932–3941.

[16] Cioffi, R., Maffucci, L., and Santoro, L., 2003, Optimization of geopolymer synthesis by calcinations and polycondensation of a kaolinitic residue, Resour. Conserv. Recycl., 40 (1), 27–38.

[17] Sabitha, D., Dattatreya, J.K., Sakthivel, N., Bhuvaneshwari, M., and Sathik, S.A.J., 2012, Reactivity, workability and strength of potassium versus sodium-activated high volume fly ash-based geopolymers, Curr. Sci., 103 (11), 1320–1327.

[18] van Deventer, J.S.J., Provis, J.L., Duxson, P., and Lukey, G.C., 2007, Reaction mechanisms in the geopolymeric conversion of inorganic waste to useful products, J. Hazard. Mater., 139 (3), 506–513.

[19] Zhang, Z., Wang, H., Provis, J.L., Bullen, F., Reid, A., and Zhu, Y., 2012, Quantitative kinetic and structural analysis of geopolymers. Part 1. The activation of metakaolin with sodium hydroxide, Thermochim. Acta, 539, 23–33.

[20] Zhang, Z., Provis, J.L., Wang, H., Bullen, F., and Reid, A., 2013, Quantitative kinetic and structural analysis of geopolymers. Part 2. Thermodynamics of sodium silicate activation of metakaolin, Thermochim. Acta, 565, 163–171.

[21] Criado, M., Fernández-Jiménez, A., and Palomo, A., 2007, Alkali activation of fly ash: Effect of the SiO₂/Na₂O ratio. Part I: FTIR study, Microporous Mesoporous Mater., 106 (1-3), 180–191.

[22] Febrero, L., Granada, E., Patiño, D., Eguía, P., and Regueiro, A., 2015, A comparative study of fouling and bottom ash from woody biomass combustion in a fixed-bed small-scale boiler and evaluation of the analytical techniques used, Sustainability, 7 (5), 5819–5837.

[23] Lee, W.K.W., and van Deventer, J.S.J., 2002, The effects of inorganic salt contamination on the strength and durability of geopolymers, Colloids Surf., A, 211 (2-3), 115–126.

DOI: https://doi.org/10.22146/ijc.26534