Assessment of Efficiency of Air Abrasive Cleaning on Masonry Stones and Bricks Using Greyscale Imaging Analysis

BINSHENG, ZHANG and HUMAYUN, REZA and NAREN, GUPTA (2015) Assessment of Efficiency of Air Abrasive Cleaning on Masonry Stones and Bricks Using Greyscale Imaging Analysis. In: Second International Conference on Advances in Civil, Structural and Construction Engineering - CSCE 2015, 18 - 19 April, 2015, Rome, Italy.

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Abstract

Advanced greyscale imaging analysis was conducted using Adobe Photoshop 6 on the surfaces of masonry stones and clay bricks, taken from old buildings, to accurately assess the efficiency of building cleaning. Five commonly used masonry stones and clay bricks for those buildings were selected, and seven abrasives were adopted for air abrasive (sandblasting) cleaning. Also the reductions in thickness were continuously monitored for assessing the cleaning efficiency. The cleaning degree at different stages was assessed using greyscale image photos, converted from original colour ones, together with reductions in thickness. In general, greyscale continuously increased with the cleaning time and tended to be stable when the surface became fully cleaned. Thickness reduction monotonically increased with the cleaning time. The most efficient building cleaning case would be the one with the shortest cleaning time and smallest thickness reduction. The harder abrasives with smaller particles sizes were confirmed to be more effective.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: historic building, masonry stones and bricks, air abrasive cleaning, greyscale, cleanness
Depositing User: Mr. John Steve
Date Deposited: 02 May 2019 12:17
Last Modified: 02 May 2019 12:17
URI: http://publications.theired.org/id/eprint/1885

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