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Characterization of Hydrogen in Concrete by Cold Neutron Prompt Gamma-Ray Activation Analysis and Neutron Incoherent Scattering

Published online by Cambridge University Press:  10 February 2011

Rick L. Paul ,
H. Heather Chen-Mayer ,
Richard M. Lindstrom  and
Menno Blaauw
Rick L. Paul
Affiliation:
Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899
H. Heather Chen-Mayer
Affiliation:
Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899
Richard M. Lindstrom
Affiliation:
Analytical Chemistry Division, National Institute of Standards and Technology, Gaithersburg, MD 20899
Menno Blaauw
Affiliation:
Inteffacultair Reactor Instituut, Technische Universiteit Delft, The NETHERLANDS.
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Abstract

A combination of cold neutron prompt gamma-ray activation analysis (PGAA) and neutron incoherent scattering (NIS) has been used for nondestructive characterization of hydrogen as a function of position in slabs of wet concrete of different compositions. Hydrogen was determined by PGAA by scanning each sample across a 5 mm diameter neutron beam in 10 mm increments, and measuring the 2223 keV prompt gamma ray. NIS measurements were performed by scanning the sample across a 5 mm diameter neutron beam at 5 mm increments and detecting scattered neutrons. The measurements demonstrate the feasibility of the techniques for 2D compositional mapping of hydrogen and other elements in materials, and indicate the potential of these methods for monitoring the uniformity of drying concrete.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 591 , 1999 , 175
Copyright
Copyright © Materials Research Society 2000

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References

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