Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (02): 20604-020604.doi: 10.11889/j.0253-3219.2014.hjs.37.020604


Application of quasi-elastic neutron scattering to dynamics study of confined water

LI Hua ZHANG Lili YI Zhou   

  1. (Department of Physics, Jinan University, Guangzhou 510632, China)
  • Received:2013-10-18 Revised:2013-11-28 Online:2014-02-10 Published:2014-02-19


Background: Quasi-elastic neutron scattering (QENS) is an important experiment for dynamics study of confined water. It is significant to study the dynamics of confined water in cement paste. Purpose: In this paper, we have two aims. One is to present a reviewer of QENS study on dynamics of confined water in cement paste in recent years. The other is to illustrate the QENS application to the study on dynamics of confined water based on cement paste. Method: Relaxing cage model (RCM) is specially introduced for the analyses of QENS spectra. Results: Based on RCM, several parameters for describing the dynamics of confined water in cement paste, can be obtained from the analyses of QENS spectra: a fraction of mobile ‘glassy’ water molecules embedded in amorphous gel region surrounding the hydration products, 1-p, the capture time of confined water molecule in some place-?0, the average translational relaxation time-

, the self-diffusion coefficient-D, and a phenomenological shape parameter describing the uniform of amorphous in cement paste-?. Conclusion: All these provide a practical method for QENS study on dynamics of confined water in cement paste.

Key words: Quasi-elastic neutron scattering (QENS), Dynamics of confined water, Relaxing cage model (RCM), Cement paste