| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1456279 | Cement and Concrete Research | 2014 | 6 Pages |
Abstract
Proton multiple-quantum (MQ) spin-counting experiment has been employed to study arrangement of hydrogen atoms in 9 Å/11 Å natural/synthetic tobermorites. Even though all tobermorite samples give similar characterless, broad static-powder 1H NMR spectra, their MQ spin-counting spectra are markedly different; higher quanta in 11 Å tobermorite do not grow with the MQ excitation time, while those in 9 Å one do. A statistical analysis of the MQ results recently proposed [26] is applied to show that hydrogens align in 9 Å tobermorite one dimensionally, while in 11 Å tobermorite they exist as a cluster of 5–8 hydrogen atoms.
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Authors
Yuuki Mogami, Satoru Yamazaki, Shinya Matsuno, Kunio Matsui, Yasuto Noda, K. Takegoshi,