A comparative study of the surface glaze characteristics of
concrete treated with CO2 and high power diode lasers.
Part II: mechanical, chemical and physical properties
The hardened ordinary Portland cement (OPC) surface layer of concrete which was glazed using a
CO2 and a high power diode laser (see Part I of this paper) has been tested in order to determine the
mechanical, chemical and physical characteristics of the glazes. The work showed that the generation
of the surface glazes resulted in improved mechanical, chemical and physical properties over the
untreated OPC surface of concrete. However, differences in the performance of the CO2 and HPDL
generated glazes were observed. These are believed to be due to the differences in the morphology
and microstructure of the glazes generated as a result of the differing beam absorption characteristics
of the two lasers. Life assessment testing revealed that the laser glazed OPC surfaces effected an
increase in actual wear life of 1.3 to 17.7 times over the untreated OPC surface of concrete depending
upon the corrosive environment
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