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A platform for research: civil engineering, architecture and urbanism
Magnesium and calcium silicate hydrates
https://orcid.org/0000-0002-9020-6488
Abstract The structure and chemistry of magnesium silicate hydrates (M-S-H) is significantly different from calcium silicate hydrates (C-S-H), although both phases are poorly crystalline and have a variable chemical composition. The molar Ca/Si ratio in synthetic C-S-H varies from approximately 0.7 to 1.5 and the Mg/Si ratio in M-S-H from 0.7 to 1.3. In M-S-H silica sheets are present, while the silica in C-S-H is organized in single chains. In addition, M-S-H contains more chemically bound water than C-S-H. Analyses of synthetic samples containing both magnesium and calcium with a total (Mg+Ca)/Si of 0.8 indicate the formation of separate M-S-H and C-S-H gels with no or very little uptake of magnesium in C-S-H or calcium in M-S-H. The clear difference in the silica structure and the difference in ionic radius of Ca2+ and Mg2+ make the formation of an extended solid solution between M-S-H and C-S-H gel improbable.
Magnesium and calcium silicate hydrates
https://orcid.org/0000-0002-9020-6488
Abstract The structure and chemistry of magnesium silicate hydrates (M-S-H) is significantly different from calcium silicate hydrates (C-S-H), although both phases are poorly crystalline and have a variable chemical composition. The molar Ca/Si ratio in synthetic C-S-H varies from approximately 0.7 to 1.5 and the Mg/Si ratio in M-S-H from 0.7 to 1.3. In M-S-H silica sheets are present, while the silica in C-S-H is organized in single chains. In addition, M-S-H contains more chemically bound water than C-S-H. Analyses of synthetic samples containing both magnesium and calcium with a total (Mg+Ca)/Si of 0.8 indicate the formation of separate M-S-H and C-S-H gels with no or very little uptake of magnesium in C-S-H or calcium in M-S-H. The clear difference in the silica structure and the difference in ionic radius of Ca2+ and Mg2+ make the formation of an extended solid solution between M-S-H and C-S-H gel improbable.
Magnesium and calcium silicate hydrates
https://orcid.org/0000-0002-9020-6488
Abstract The structure and chemistry of magnesium silicate hydrates (M-S-H) is significantly different from calcium silicate hydrates (C-S-H), although both phases are poorly crystalline and have a variable chemical composition. The molar Ca/Si ratio in synthetic C-S-H varies from approximately 0.7 to 1.5 and the Mg/Si ratio in M-S-H from 0.7 to 1.3. In M-S-H silica sheets are present, while the silica in C-S-H is organized in single chains. In addition, M-S-H contains more chemically bound water than C-S-H. Analyses of synthetic samples containing both magnesium and calcium with a total (Mg+Ca)/Si of 0.8 indicate the formation of separate M-S-H and C-S-H gels with no or very little uptake of magnesium in C-S-H or calcium in M-S-H. The clear difference in the silica structure and the difference in ionic radius of Ca2+ and Mg2+ make the formation of an extended solid solution between M-S-H and C-S-H gel improbable.
Magnesium and calcium silicate hydrates
Lothenbach, B. (author) / Nied, D. (author) / L'Hôpital, E. (author) / Achiedo, G. (author) / Dauzères, A. (author)
Cement and Concrete Research ; 77 ; 60-68
2015-06-17
9 pages
Article (Journal)
Electronic Resource
English
M-S-H , C-S-H (B) , Solubility , <sup>29</sup>Si NMR , Raman
Magnesium and calcium silicate hydrates
| British Library Online Contents | 2015
Magnesium and calcium silicate hydrates
| Online Contents | 2015
Magnesium and calcium silicate hydrates
| British Library Online Contents | 2015
| Engineering Index Backfile | 1934
| Engineering Index Backfile | 1935