Evaluation of the Efficiency of the Hydrophobic Surface Treatment for Bricks Using Neutron Imaging A. El Abd1* , M. Taman2, S.E. Kiсhanov3, E. Hamad1, К.М. Nazarov3,4 1Reactor physics department, Nuclear research Center, Egyptian Atomic Energy Authority, Egypt 2Department of Structural Engineering, Faculty of Engineering, TantaUniversity,31511,Tanta, Egypt 3Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research, 141980, Dubna, Russia 4Eurasian NationalUniversity, 010008, As