Correlation between ^29Si polymerization and cementitious activity of coal gangue
A new method for estimating the degree of [SiO4]4-polymerization of coal gangue is presented. The method uses the relative bridging oxygen number (RBO) based on nuclear magnetic resonance (NMR) techniques. X-ray diffraction (XRD) and ^29Si NMR techniques have been used to study phase transitions and...
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Published in | Journal of Zhejiang University. A. Science Vol. 10; no. 9; pp. 1334 - 1340 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Hangzhou
Zhejiang University Press
01.09.2009
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Subjects | |
Online Access | Get full text |
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Summary: | A new method for estimating the degree of [SiO4]4-polymerization of coal gangue is presented. The method uses the relative bridging oxygen number (RBO) based on nuclear magnetic resonance (NMR) techniques. X-ray diffraction (XRD) and ^29Si NMR techniques have been used to study phase transitions and silicate polymerization of coal gangue calcined at different temperatures or co-calcined. It has been found that phase transition of clay minerals causes silicate polymerization to change with temperature. In this study, cementing activity and RBO were determined to be inversely related. Generally, activated coal gangue with lower RBO had better cementitious activity. |
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Bibliography: | Degree of polymerization, Relative bridging oxygen number (RBO), Nuclear magnetic resonance (NMR), Coal gangue, Cementitious activity O632.12 TQ172.13 33-1236/O4 |
ISSN: | 1673-565X 1862-1775 |
DOI: | 10.1631/jzus.A0920237 |