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

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.
Authors:
 [1] ; ;  [2] ;  [3] ;  [1] ;  [1]
  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)
Publication Date:
OSTI Identifier:
22395936
Resource Type:
Journal Article
Resource Relation:
Journal Name: Cement and Concrete Research; Journal Volume: 66; Other Information: Copyright (c) 2014 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
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