期刊
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
卷 127, 期 3, 页码 1953-1961出版社
SPRINGER
DOI: 10.1007/s10973-016-5823-x
关键词
Fly ash geopolymerization; Isothermal conduction calorimetry; Reaction kinetics; Nucleation and growth; Activation energy
资金
- i-PSG team, CSIR-NML, Jamshedpur
Isothermal conduction calorimetry has been used to study the reaction kinetics of early geopolymerization of fly ash. Fly ash particles were subjected to react with NaOH solution in 2:1 ratio at isothermal temperatures of 34, 39, 45, 52, and 60 A degrees C. The reaction kinetic parameters such as activation energy, rate of reaction, and pre-exponential function were calculated using the rate of heat evolution data. It is observed that the geopolymerization reaction followed a nucleation and growth mechanism. The activation energy obtained from an Arrhenius plot was around similar to 100 kJ mol(-1).
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