A comparative study of the surface glaze characteristics ofudconcrete treated with CO2 and high power diode lasers.udPart II: mechanical, chemical and physical properties

摘要

The hardened ordinary Portland cement (OPC) surface layer of concrete which was glazed using audCO2 and a high power diode laser (see Part I of this paper) has been tested in order to determine theudmechanical, chemical and physical characteristics of the glazes. The work showed that the generationudof the surface glazes resulted in improved mechanical, chemical and physical properties over theuduntreated OPC surface of concrete. However, differences in the performance of the CO2 and HPDLudgenerated glazes were observed. These are believed to be due to the differences in the morphologyudand microstructure of the glazes generated as a result of the differing beam absorption characteristicsudof the two lasers. Life assessment testing revealed that the laser glazed OPC surfaces effected anudincrease in actual wear life of 1.3 to 17.7 times over the untreated OPC surface of concrete dependingudupon the corrosive environment.