Study of Mechanical Force on Coal Gangue Reactivity

Chang Sen Zhang; Xue Feng Liu; Qi Sheng Wu; Yo Xin Deng; Lei Li

doi:10.4028/www.scientific.net/KEM.539.145

Paper Titles

Effect of Activated Water Treatment Sludge on Carbonation of Mortar
p.120

Effect of Fly Ash on Resistance to Sulfate Attack of Cement-Based Materials
p.124

Study of Durability Analysis and Evaluation Model for Existing Concrete Structure in Coastal Areas
p.130

The Effect of Fly Ash on TSA of Cementitous Material: Based on Three Years Results
p.139

Study of Mechanical Force on Coal Gangue Reactivity
p.145

The Effect of Electrochemical Chloride Extraction Combining Ultrasonic on Steel-Reinforced Mortars
p.149

Tentative Study on Sonoelectrochemical Chloride Extraction from Mortar
p.153

Analysis of Bond and Anchorage Performances of Helical and Twisted Reinforcement Material
p.158

Research on Modification of Steady State Migration Test for Cementitious Materials
p.166

HomeKey Engineering MaterialsKey Engineering Materials Vol. 539Study of Mechanical Force on Coal Gangue...

Study of Mechanical Force on Coal Gangue Reactivity

Abstract:

The property of raw kaolinite-coal-gangue is very stable, and reactivity of kaolinite-coal-gangue is enhanced by mechanical force. The SEM, XRD and IR were used to analyze mechanochemical changes during kaolinite-type-coal gangue grinding. The results showed that mechanical force plays a dominant role in the enhanced reactivity, by inducing dehydration reactions the lattice OH grouping decreased with the extension of grinding time. The separation of tetrahedral and octahedral layers combined with the increasing disorder of the kaolinite crystal structure, resulting in kaolinite-type-coal gangue particles become "loose" aggregates. Moreover, due to destroy to tight Si-O and Al-O bond, the mechanical force increases the solubility of SiO2 and Al2O3, which enhanced the reactivity of coal gangue.

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Periodical:

Key Engineering Materials (Volume 539)

Pages:

145-148

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.539.145

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Online since:

January 2013

Authors:

Chang Sen Zhang, Xue Feng Liu, Qi Sheng Wu, Yo Xin Deng, Lei Li

Keywords:

Activity, Gangue, Kaolinite, Mechanochemical

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