Factors Affecting the Setting Time of Fly Ash-Based Geopolymer

Antoni Antoni; Stephen Wibiatma Wijaya; Djwantoro Hardjito

doi:10.4028/www.scientific.net/MSF.841.90

Paper Titles

Analysis of Coal Waste Solidification as an Alternative Filler Material in Asphalt Concrete Mixture
p.65

The Use of Fermipan in the Production of Lightweight Geopolymer as an Environmentally Friendly and Fire-Resistant Concrete
p.72

Synthesis of Geopolymer Paste as Coating Material Based on Kaolinite and Rice Husk Ash
p.79

Performance of Blended Fly Ash (FA) and Palm Oil Fuel Ash (POFA) Geopolymer Mortar in Acidic Peat Environment
p.83

Factors Affecting the Setting Time of Fly Ash-Based Geopolymer
p.90

Compressive Strength of Geopolymer Based on the Fly Ash Variation
p.98

Flexural Strength of Low Calcium Class F Fly Ash-Based Geopolymer Concrete in Long Term Performance
p.104

Application of Pozzolan as Materials of Geopolymer Paste
p.111

Characterization of Fly Ash on Geopolymer Paste
p.118

HomeMaterials Science ForumMaterials Science Forum Vol. 841Factors Affecting the Setting Time of Fly...

Factors Affecting the Setting Time of Fly Ash-Based Geopolymer

Abstract:

Fly ash is a waste from coal burning, that are generated with fluctuation both in its physical and chemical characteristics. This characteristics of fly ash when used in the making of geopolymer concrete will greatly affect the final products obtained. The pH value measured in fly ash, according previous research, can influence the setting time of geopolymer and fly ash with high pH values can cause flash-setting in the concrete. Understanding more clearly about the factors that affect the setting time of fly ash based geopolymer is important for further progress and development of the material. It was found that factors that influence the setting time of geopolymer was not only from the physical and chemical properties of the fly ash itself. Other factors such as composition and mix design, manufacturing process and environmental conditions can also affect its setting time. The experimental results showed that fly ash particle size, CaO and MgO content, in addition to ratio of sodium silicate and sodium hydroxide in the alkali solution, molarity of NaOH, initial temperature of the mixture, curing temperature, and mix volume could potentially influence the setting time of the geopolymer mixture.

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Periodical:

Materials Science Forum (Volume 841)

Pages:

90-97

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.841.90

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Online since:

January 2016

Authors:

Antoni Antoni*, Stephen Wibiatma Wijaya, Djwantoro Hardjito

Keywords:

CaO Content, Geopolymer, pH Level, Setting Time, SSA

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* - Corresponding Author

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