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Appl Radiat Isot. 2015 Nov;105:6-10. doi: 10.1016/j.apradiso.2015.07.010. Epub 2015 Jul 11.

Chlorine signal attenuation in concrete.

Author information

1
Department of Physics, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia. Electronic address: aanaqvi@kfupm.edu.sa.
2
Center for Engineering Research, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
3
Department of Physics, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
4
Department of Civil & Environmental Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.

Abstract

The intensity of prompt gamma-ray was measured at various depths from chlorine-contaminated silica fume (SF) concrete slab concrete specimens using portable neutron generator-based prompt gamma-ray setup. The intensity of 6.11MeV chloride gamma-rays was measured from the chloride contaminated slab at distance of 15.25, 20.25, 25.25, 30.25 and 35.25cm from neutron target in a SF cement concrete slab specimens. Due to attenuation of thermal neutron flux and emitted gamma-ray intensity in SF cement concrete at various depths, the measured intensity of chlorine gamma-rays decreases non-linearly with increasing depth in concrete. A good agreement was noted between the experimental results and the results of Monte Carlo simulation. This study has provided useful experimental data for evaluating the chloride contamination in the SF concrete utilizing gamma-ray attenuation method.

KEYWORDS:

Chlorine gamma ray intensity measurement silica fume cement concrete; Monte Carlo simulations; Portable neutron generator based PGNAA setup

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