Assessment of Fire-Damaged Mortar Using Digital Image Process
Publication: Journal of Materials in Civil Engineering
Volume 16, Issue 4
Abstract
The objective of this work is to develop a user-friendly software, called an “image color intensity analyzer”, and study its application to the relationship between surface color changes and different elevated temperatures of fire-damaged mortar specimens. Images of tested specimens were captured using an ordinary digital camera before being uploaded to a personal computer. Thereafter, the analyzer calculates the intensities of the color components in different color spaces. The relationship between elevated temperatures as well as changes to the color components in different color spaces is studied. This study shows that the intensities calculated from the square root of one-third of the sum of the square of red, green, and blue for sand are useful in determining the highest temperature of the fire-damaged mortar. Results also indicate that the analyzer can quantify color changes of fire-damaged mortar handily and directly.
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References
Bessey, G. E. (1950). “Investigations to buildings fires. II. Visible changes in concrete and mortar exposed to high temperature.” National Building Studies Technical Paper, No. 4, Her Majesty’s Stationery Office, London, 6–18.
Gonzalez, R. C., and Woods, R. F. (1992). Digital image processing, Addison-Wesley, Reading, Mass.
Guise, S. E. (1997). “The use of colour image analysis for assessment of fire damaged concrete.” PhD thesis, Aston Univ., Aston Triangle, Birmingham B4 7ET, U.K.
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Information
Published In
Journal of Materials in Civil Engineering
Volume 16 • Issue 4 • August 2004
Pages: 383 - 386
Copyright
Copyright © 2004 American Society of Civil Engineers.
History
Received: Feb 13, 2002
Accepted: Oct 15, 2003
Published online: Jul 15, 2004
Published in print: Aug 2004
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