Reaction kinetics of fly ash geopolymerization: Role of particle size controlled by using ball mill

The thermal reaction kinetics of fly ash cement pastes were studied by Differential Scanning Calorimetry (DSC) and Thermal Gravity Analysis-Differential Thermal Gravity (TG-DTG) method, the kinetics parameters such as apparent activation energy was calculated by the Kissinger method, and the physical parameters were obtained. The result show that the fly ash cement pastes performance three endothermic reaction stages at different heating rates, peak temperatures of each stage at the range of 91.85~121.08°C, 453.93~496.48°C, and 680.21~751.62°C. TG-DTG show there were three thermal decomposition stages, thermal dehydration reaction apparent activation energy of fly ash cement pastes in each stage were 47.23kJ/mol, 128.84kJ/mol, and 134.07kJ/mol.

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Increasing the reaction kinetics of alkali-activated fly ash binders for stabilisation of a silty sand pavement sub-base

Road Materials and Pavement Design ◽

10.1080/14680629.2016.1251959 ◽

2016 ◽

Vol 19 (1) ◽

pp. 201-222 ◽

Cited By ~ 10

Author(s):

Sara Rios ◽

Nuno Cristelo ◽

Tiago Miranda ◽

Nuno Araújo ◽

Joel Oliveira ◽

...

Keyword(s):

Fly Ash ◽

Reaction Kinetics ◽

Silty Sand ◽

Kinetics Of ◽

Alkali Activated

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Size-controlled synthesis and characterization of polyvinyl alcohol-coated platinum nanoparticles: role of particle size and capping polymer on the electrocatalytic activity

Catalysis Science & Technology ◽

10.1039/c3cy20686f ◽

2013 ◽

Vol 3 (5) ◽

pp. 1314 ◽

Cited By ~ 28

Author(s):

Partha Sarathi Roy ◽

Swapan Kumar Bhattacharya

Keyword(s):

Particle Size ◽

Polyvinyl Alcohol ◽

Platinum Nanoparticles ◽

Electrocatalytic Activity ◽

Synthesis And Characterization ◽

Controlled Synthesis ◽

Size Controlled

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Effect of Grinding Methods on the Performance of Ground Fly Ash

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.477.10 ◽

2011 ◽

Vol 477 ◽

pp. 10-15

Author(s):

Zhong Yuan Lu ◽

Xun Xu ◽

Jun Li

Keyword(s):

Particle Size ◽

Fly Ash ◽

Ball Mill ◽

Average Particle Size ◽

Average Particle ◽

Uniformity Coefficient ◽

Mortar Strength ◽

Particle Size Analyzer ◽

Vibration Mill ◽

Scanning Electron

In this study, coarse fly ash was ground with laboratory ball mill, vibration mill and jet mill respectively. The powder characteristic of ground fly ash was tested by laser particle size analyzer and scanning electron microscope. And the performance of cement containing different ground fly ash was also studied. It was observed that the characteristic value of fly ash ground by ball mill, vibration mill and jet mill was 13.543 μm, 13.403 μm and 17.344 μm, respectively, when average particle size was about 25μm. And the uniformity coefficient of fly ash ground by ball mill, vibration mill, and jet mill was 1.26, 1.24 and 1.38, respectively. Specially, the mortar strength was increased when 10 to 20 percent of ground fly ash was added. And the highest fluidity of mortar was obtained when 30 percent of fly ash ground by jet mill was added.

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