Hydrogen cluster/network in tobermorite as studied by multiple-quantum spin counting {sup 1}H NMR

Journal Article · Mon Dec 15 00:00:00 EST 2014 · Cement and Concrete Research

DOI:https://doi.org/10.1016/J.CEMCONRES.2014.07.023· OSTI ID:22395936

Mogami, Yuuki ^[1]; Yamazaki, Satoru; Matsuno, Shinya ^[2]; Matsui, Kunio ^[3]; Noda, Yasuto ^[1]

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1. Division of Chemistry, Graduate School of Science, Kyoto University, Kyoto 606-8502 (Japan)
2. Analysis and Simulation Center, Asahi Kasei Corporation, Fuji, Shizuoka 416-8501 (Japan)
3. Products and Marketing Development Dept., Asahi Kasei Construction Materials Corporation, Sakai-machi, Ibaraki 306-0493 (Japan)

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 {sup 1}H 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.

• OSTI ID: 22395936
• Journal Information: Cement and Concrete Research, Vol. 66; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0008-8846
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CALCIUM SILICATES
EXCITATION
HEAT TREATMENTS
HYDRATES
HYDROGEN
MICROSTRUCTURE
NMR SPECTRA
NUCLEAR MAGNETIC RESONANCE
POWDERS
PROTONS
SPECTROSCOPY
SPIN