Processing of concretes with a high power CO2 laser

An experimental investigation of laser scabbling on cement-based materials using nanosecond fiber laser

“…In contrast, the scabbling depth was not achieved at the beginning of the processing for all CM, LP, and UHPC samples. At the initiation of the process, when the laser source irradiated the samples, the surface temperate quickly reached the glass transition temperature (~ 1300 °C) 10 , forming a hard glassy layer and accumulating some additional volume. At the end of the process, due to the heat accumulation as depicted in the Fig.…”

“…On the other hand, laser processing has several advantages: remote control, non-contact process, high precision, no-requirement of secondary media assisting the process, no-reaction forces, low noise, vibrations, and dust 10 . However, some researchers believe that laser processing can generate some dust particles in a respirable regime, but those problems can be alleviated by attaching dust extraction systems.…”

“…Due to its rapid development, laser processing is a promising technology to remove defects on concrete surfaces at construction sites. The laser processing capability on concrete has been the subject of various studies 10 – 13 . Laser cutting has been used in building and construction sites for decades due to its outstanding benefits.…”

Laser beam machining—A review

“…The effect of pulse intensity (kW) on depth of cut or MRR during pulsed Nd:YAG laser cutting shows increasing effect for all metal matrix composites, carbon fibre composites and ceramic composites [69]. The MRR during laser machining of concretes shows increasing trend with both laser power and scan speed [53].…”

“…Refs. [50][51][52][53] have discussed the details of successful cutting of these materials by laser beam. Glasses used in optoelectronics are micromachined by laser beam as shown in Fig.…”