Abstract
The paper presents part of the larger study on laser cleaning process. A special emphasis is placed on the modification of geometrical microstructure and chemical composition of cementitious composites resulting from cleaning process. A wide range of samples characterised with different internal microstructures, surface roughness, and moisture content were subjected to laser cleaning process, and a subsequent assessment. Removal of mortar, cracks and glassy patches were the characteristic features of all laser-cleaned areas. Cracks of wider openings may also form as a consequence of the expansion of water/air inside pores, predominantly smoother/denser mortars. The experimental results prove that the laser cleaning process leads to an increase of Si element concentration and/or decrease in Ca concentration. The observed alterations should be associated with changes in the relative distribution of melted cement paste and aggregate and therefore relative elemental abundance in the near-surface layer.
Original language | English |
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Title of host publication | Concrete Repair, Rehabilitation and Retrofitting II |
Editors | Mark G. Alexander, Hans-Dieter Beushausen, Frank Dehn, Pilate Mayo |
Place of Publication | London |
Publisher | Taylor and Francis Group |
Pages | 129-130 |
Number of pages | 2 |
ISBN (Electronic) | 978-1-4398-2840-3 |
ISBN (Print) | 978-0-415-46850-3 |
DOIs | |
Publication status | Published - 2009 |
Keywords
- laser
- laser cleaning
- cementitious composites