Geopolymerisation of Mechanically Activated Lignite and Brown Coal Fly Ash

• Authors: G. Mucsi , Z. Molnár , S. Kumar
• Languages of publication: EN

Abstracts

EN

Geopolymers have been synthesized from mechanically activated lignite and brown coal fly ash. Mechanical activation of fly ash has been carried out using laboratory ball mill. To determine the structural changes in both, the fly ash and the resulted geopolymer, Fourier transform infrared spectroscopy measurements were performed. Isothermal conduction calorimetry method was applied to study the geopolymerisation reactions in mechanically non-activated (raw) and activated fly ash samples. The isothermal conduction calorimetry results showed similar peak intensity for mechanically activated (5-30 min) fly ash samples. However, the intensity of peak for 120 min milled brown coal fly ash was the highest. The compressive strength of the specimen was found to be dependent on the grinding residence time as well as composition/type of fly ash.

Keywords

EN

81.20.Wk

Discipline

• 81.20.Wk: Machining, milling

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2014
• Volume: 126
• Issue: 4
• Pages: 994-998

Dates

published

2014-10

Contributors

author

G. Mucsi

• Institute of Raw Material Preparation and Environmental Processing, University of Miskolc, Hungary

author

Z. Molnár

• Institute of Raw Material Preparation and Environmental Processing, University of Miskolc, Hungary

author

S. Kumar

• CSIR-National Metallurgical Laboratory, Jamshedpur, India

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Identifiers

DOI

10.12693/APhysPolA.126.994