The compositions, surface texture, absorption, and binding properties of fly ash in China
- Hong Kong Univ. of Science and Technology, Kowloon (Hong Kong). Dept. of Civil Engineering
The compositions, particle distribution, and surface textures of fly ashes from various sources in China were investigated by means of a laser scanning particles distribution meter, a nitrogen absorption meter, scanning electronic microscopy, mercury intrusion porosimetry, and x-ray diffraction tests. Based on the test results, the absorption and binding mechanism of fly ash on Ca{sup 2+}, Na{sup +}, OH{sup {minus}}, Cl{sup {minus}}, and Cr{sup 3+} ions were studied. The study showed that particle distribution of fly ash depends on the type of coal and its combustion conditions. The fly ashes investigated in the present investigation are formed of amorphous or glassy structures. Fly ashes also have large specific surface and special texture, and have fairly good absorption and binding capability on Ca{sup 2+}, Na{sup +}, OH{sup {minus}}, Cl{sup {minus}}, and Cr{sup 3+} ions. This conclusion is important to wide application of fly ash in the future.
- OSTI ID:
- 684519
- Journal Information:
- Environment International, Vol. 25, Issue 4; Other Information: PBD: May 1999
- Country of Publication:
- United States
- Language:
- English
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