This article investigates the use of photon attenuating inclusions (PAI) for enhancing radiographic imaging of cementitious materials in composite structures. By targeting characteristic high attenuation regions in the photon energy spectrum, PAI can improve void detection in the parent material by increasing contrast in radiographic images. Radiographic imaging of cementitious grout specimens with 5% and 15% weight fractions of candidate PAI materials (Fe, BaCO3, BaSO4) was performed to characterize X-ray attenuation. Virtual radiography simulations were then conducted to evaluate the application of PAI to grout void detection in post-tensioned concrete construction. The simulations demonstrate that grout void detection is most effective when the high energy region of the emission spectrum is near the K-edge of the PAI material.
 JME Advanced Inspection Systems, http://jme.co.uk. (Accessed Oct. 24, 2016).
 A. Azizinamini, FDOT protocol for condition assessment of steel strands in posttensioned segmental concrete bridges. FDOT Report BDK80 977-13, Florida Department of Transportation, Tallahassee, FL, United States (2012).
 X. Zhou et al., Ad. Mat. Res. 2013. 639–640, 1015–1020 (2013).
 CEA LIST, CIVA RT v11 Documentation. http://extende. (Accessed Oct. 24, 2016).
 D. Tisseur et al., Validation of CIVA 10 RT Module in a Nuclear Context CEA LIST Technical Presentation, May 24,2012
 W. J. Keller and S. Pessiki, J. Nondestruct. Eval.. 34, 1–12 (2012).
 D. M. Tucker, G. T. Barnes, and D. P. Chakraborty, Med. Phy.. 18, 211–218 (1991). DOI: 10.1118/1.596709.
 J. H. Hubbel and S. M. Seltzer, Tables of X-ray mass attenuation coefficients and mass energy-absorption coefficients. NISTIR 5632, National Institute of Standards and Technology; 1996.
 O. Klein and Y. Nishina, On the scattering of radiation by free electrons according to Dirac’s new relativistic quantum dynamics, The Oskar Klein Memorial Lectures, World Scientific Publishing Co. Pte. Ltd., Singapore; 1994; 2:113–139.
 E. Storm and H. I. Israel, Photon Cross Sections from 1 keV to 100 MeV for Elements Z=1 to Z=100 (Nuclear Data Tables, Los Alamos Scientific Laboratory, Los Alamos, New Mexico, 1970).
 European Committee for Standardization. Non-destructive testing – industrial radiographic film – part 1: classification of film systems for industrial radiography. EN 584-1:2006, Secretariat CEN/TC 138; 2005.
 A. Schumm and U. Zscherpel, The EN584 standard for the classification of industrial radiography films and its use in radiographic modelling. 6th International Conference on NDE in Relation to Structural Integrity for Nuclear and Pressurized Components; Budapest, Hungary; 8–10 October 2007.
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