STUDY OF INTERNAL DEFECTS AND WATER ABSORPTION BEHAVIOR OF SINGLE LAYER ITALIAN TILES USING NEUTRON RADIOGRAPHY FACILITY OF 3 MW TRIGA MARK II RESEARCH REACTOR

摘要

Neutron radiography (NR) technique has been adopted to study internal defects and water absorption behavior of building materials, like single layer Italian tiles obtained from Concord Real Estate & Building Products, Unit II, Salna, Gazipur, Bangladesh. Measurements of optical density differences between the film background and radiographic images of the dry/wet samples were used for investigation of the present work. Little variation in optical density values of the radiographic image was observed. The rate of water absorption of the tiles decreases with increase of water absorption time. No internal defect could be found in the tiles through the investigation of radiographic image and subsequently analyzing the line profiles at different levels (including center position) of it. Thus elemental distributions of the tiles are found to be almost homogeneous.