A Study of the Internal DEffects of Terrazzo and Engraved Construction Materials using Direct Film Neutron Radiography Technique | [Proceedings of Pakistan Academy of Sciences • 2014]

Author(s):

1. Sudipta Saha: Institute of Nuclear Science and Technology, Atomic Energy Research Establishment,Savar, P.O. Box 3787, Dhaka-1000,Bangladesh

2. M.N. Islam: Institute of Nuclear Science and Technology, Atomic Energy Research Establishment,Savar, P.O. Box 3787, Dhaka-,Bangladesh

3. M.K. Alam: Institute of Nuclear Science and Technology, Atomic Energy Research Establishment,Savar, P.O. Box 3787, Dhaka-1000,Bangladesh

4. A.K.M. Azad Rahman: Department of Physics, Shahjalal University of Science and Technology,Sylhet-3114,Bangladesh

5. M.H. Ahsan: Department of Physics, Shahjalal University of Science and Technology,Sylhet-3114,Bangladesh

Abstract:

Neutron radiography technique has been utilized in the work for studying internal defects of various types of construction materials through optical density measurements of the samples. Two kinds of locally developed construction materials have been used as samples in the experiment. They are Terrazzo and Engraved construction materials. Tangential Neutron Radiography Facility of 3 MW TRIGA Mark, UHVDFK HUDFWR VL VXHG HKU RW ¿QG RXW KWH QLWHUDO HGIFW V RI WKH VDPSOH U)RP KWH ERVHUYDWLQ IR neutron radiographic images of the samples and variation of optical density at different positions, it revealed that the associated composites of Terrazzo construction material are uniformly distributed. No voids or any inclusions in the materials have been observed in the radiograph. The neutron radiographic image of Engraved construction material shows that the optical density values at different reference positions are different. The density at the central position of the image is different from its neighboring reference positions. Moreover, RVPHYLGUDHERVYGQLKWHQXURGDLJSKIRKWHPDUL OD7KLVRFQ¿UPKWDQLWKVPDHULOKW associated composites are not uniformly mixed and distributed during its fabrication. So, the fabrication of this construction material is relatively faulty. This faulty material may have several bad impacts while it is used as a construction material. It can absorb rainwater and thus may be damaged. Due to its structural disorder, its strength is deteriorated and may be damaged easily from even a very minor environmental turmoil.

Page(s): 331-336

DOI: DOI not available

Published: Journal: Proceedings of Pakistan Academy of Sciences, Volume: 51, Issue: 4, Year: 2014

Keywords:

Optical Density , nondestructive testing , Neutron radiography

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