The Effect of Alkaline Activator Types on Strength and Microstructural Properties of Geopolymer from Co-Combustion Residuals of Bamboo and Kaolin
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...
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doaj-689cca8138504f4d972a931de0bdb87d2020-11-25T01:27:01ZengUniversitas Gadjah MadaIndonesian Journal of Chemistry1411-94202460-15782018-08-0118339740210.22146/ijc.2653421124The Effect of Alkaline Activator Types on Strength and Microstructural Properties of Geopolymer from Co-Combustion Residuals of Bamboo and KaolinAprilina Purbasari0Tjokorde Walmiki Samadhi1Yazid Bindar2Chemical 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, IndonesiaChemical Engineering Program, Bandung Institute of Technology, Jl. Ganesha No. 10, Bandung 40132, IndonesiaChemical Engineering Program, Bandung Institute of Technology, Jl. Ganesha No. 10, Bandung 40132, IndonesiaGeopolymer 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.https://jurnal.ugm.ac.id/ijc/article/view/26534alkaline activatorbamboocementgeopolymerkaolin |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Aprilina Purbasari Tjokorde Walmiki Samadhi Yazid Bindar |
spellingShingle |
Aprilina Purbasari Tjokorde Walmiki Samadhi Yazid Bindar The Effect of Alkaline Activator Types on Strength and Microstructural Properties of Geopolymer from Co-Combustion Residuals of Bamboo and Kaolin Indonesian Journal of Chemistry alkaline activator bamboo cement geopolymer kaolin |
author_facet |
Aprilina Purbasari Tjokorde Walmiki Samadhi Yazid Bindar |
author_sort |
Aprilina Purbasari |
title |
The Effect of Alkaline Activator Types on Strength and Microstructural Properties of Geopolymer from Co-Combustion Residuals of Bamboo and Kaolin |
title_short |
The Effect of Alkaline Activator Types on Strength and Microstructural Properties of Geopolymer from Co-Combustion Residuals of Bamboo and Kaolin |
title_full |
The Effect of Alkaline Activator Types on Strength and Microstructural Properties of Geopolymer from Co-Combustion Residuals of Bamboo and Kaolin |
title_fullStr |
The Effect of Alkaline Activator Types on Strength and Microstructural Properties of Geopolymer from Co-Combustion Residuals of Bamboo and Kaolin |
title_full_unstemmed |
The Effect of Alkaline Activator Types on Strength and Microstructural Properties of Geopolymer from Co-Combustion Residuals of Bamboo and Kaolin |
title_sort |
effect of alkaline activator types on strength and microstructural properties of geopolymer from co-combustion residuals of bamboo and kaolin |
publisher |
Universitas Gadjah Mada |
series |
Indonesian Journal of Chemistry |
issn |
1411-9420 2460-1578 |
publishDate |
2018-08-01 |
description |
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. |
topic |
alkaline activator bamboo cement geopolymer kaolin |
url |
https://jurnal.ugm.ac.id/ijc/article/view/26534 |
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