Abstract
Recently, in Japan, safety measures such as earthquake-resistant reinforcement work and tile-reinforcement work are increasing. Current concrete drilling methods have issues such as noise, vibration, dust, and reaction force. These methods are causing stress for the residents. Consequently, solutions are being sought for work taking place on skyscrapers and at facilities that cannot shut down during construction, such as hotels, schools, hospitals and geriatric facilities for instance. This study investigated how laser drilling change the conditions, depending on the type of concrete in order to determine the possibility of using laser drilling for tile-reinforcement work and repairing concrete on building exterior. The results confirmed that it’s possible to successfully drill holes for drilling diameters of 4 to 6 mm and depths of around 50 mm in concrete with a compressive strength within the range of 20 to 100 N/mm2 by adjusting laser conditions. In case of deep holes the CW-mode should be chosen. Furthermore, by controlling laser irradiation conditions, it is possible to change the shape of the holes. These different kinds of holes are suitable for different applications. It is expected that laser irradiation drilling will be applied to new construction methods.
Highlights
In Japan, awareness of disaster prevention is rising owing to the Great East Japan earthquake and the Kumamoto earthquake, and earthquake-resistant constructions and tile-reinforcement research are increasing. [1]For this study, holes are drilled into concrete in order to install anchor bolts and pins
This study investigated how laser drilling change the conditions, depending on the type of concrete in order to determine the possibility of using laser drilling for tile-reinforcement work and repairing concrete on building exterior
By controlling laser irradiation conditions, it is possible to change the shape of the holes
Summary
In Japan, awareness of disaster prevention is rising owing to the Great East Japan earthquake and the Kumamoto earthquake, and earthquake-resistant constructions and tile-reinforcement research are increasing. Holes are drilled into concrete in order to install anchor bolts and pins. Earthquake-resistant constructions need holes with big diameter and depth. Big bolts for concrete reinforcement are required. In the case of tile-reinforcement, almost invisible holes and pins with small diameter and depth for fixing and adhesive are necessary. A tile is a thin plate fixed on the exterior surface of a building
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
