Laser Drilling of Small Holes in Different Kinds of Concrete
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.
Masaya Hirosawa “Present Condition of Seismic Retrofit of Buildings in Japan” Concrete Journal 35(10), (1997), 3-8, doi:10.3151/coj19184.108.40.206_3.
H. Nasu, T. Hasegawa, N. Mishima, S. Hatanaka, “Fundamental Study on Reinforcing Effect of Impregnating and Film Forming Agent on Prevention of Falling of Exterior Tiles” Proceedings of Tokai Chapter Architectural Research Meeting (52), (February 2014), 61-64.
Saitou, H. Trends in consideration of safety and tilework: (General) Technical trends on wall preventive measures. General building renovation and renewal technology magazine. Tetuadou shuppan. pp.38-40, 2008.
Japan pinnet association, Trends in consideration of safety and tilework: (General) Technical trends on wall preventive measures. General building renovation and renewal technology magazine. Tetuadou shuppan. pp.41-44, 2008.
H. Daido, T. Yamada, A. Nishimura, “Experimental characterization of concrete removal by high-power quasicontinuous wave fiber laser irradiation”, Journal of Laser Applications 29, 041501(2017), doi:10.2351/1.5008326.
Kaori Nagai, “Laser Processing for Construction Site: Laser Non-Slip Processing” The Laser Society of Japan 38(10), (October 2010), 744-748.
Laser society of Japan. “Handbook of laser processing applications.” (April25 2005):157190. doi:10.1541/ieejeiss.123.241.
J. O. Maclean, J.R. Hodson, K.T. Voisey, “Laser drilling of via micro-holes in single-crystal semiconductor substrates using a 1070nm fibre laser with millisecond pulse widths”, Proceedings of Laser Applications Symposium, (2015), doi:10.1117/12.2175898.
D. Krajcarz, “Coparison Metal WaterJet Cutting with Laser and Plasma Cuttin”, Procedia Engineering69, (2014), 838-848, doi:10.1016/j.proeng.2014.03.061.
M.Rossini, P. R. Spena, L.Cortese, P.Matteis, D. Firrao, “Investigation on dissimilar laser welding of advanced high strength steel sheets for the automotive industry, Materials Science and Engineering: A628(25),(March 2015), 288-296, doi:10.1016/j.msea.2015.01.037.
A. Kruusing, “Underwater and water-assisted laser processing: part2 Etching, cutting and rarely used methods”, Optics and Lasers engineering 41. (February 2004):329-352. doi:10.1016/S0143-8166(02)00143-4.
D. He, S. Zheng, J. Pu, G. Zhang, L. Hu, “Improving tribological properties of titanium alloys by combining laser surface texturing and diamond-like carbon film”, Tribology International82,PartA(February 2015), 20-27, doi:10.1016/j.triboint.2014.09.017.
J.Chen, Z.Zhang, X,Chen, C. Zhang, G. Zhang, Z. Xu, “Design and manufacture of customized dental implants by using reverse engineering and selective laser melting technology”, The journal of prosthetic dentistry112, Issue5, 1088-1095, (November 2014), doi:10.1016/j.prosdent.2014.04.026.
Ahmed Hafez, S. Ibrahim, S. Omar, S. Eddeen, K. Beshay, “Laser Drilling Using Nd:YAG on Limestone, Sandstone and Shale Samples: ROP Estimation and the Development of a Consrant ROP Drilling System”, Proceedings of the SPE North Africa Technical 2015, SPE-175848-MS, doi:10.2118/175848-MS.
A.Bharatish, B.Kishore Kumar, R.Rajath, H.N.Narasimha Murthy, “Investigation of effect of CO2 laser parameters on drilling characteristics of rocks encountered during mining”, Journal of King Saud University-Engineering Sciences, (December2017), doi:10.1016/j.jksues.2017.12.003.
H. Hitoshi, “On site experiment for evaluation of the noise and vibration applying lower noise and vibration type drill: Part2 Result of the measurement of vibration.” Japan society for finishings technology (October 2006): 183-186.doi:10.14820/ finex.2006.0.45.0.
Yoshinobu Yokote. “Low-noise type drilling noise and vibration: Comparison of propagation characteristics in the population and the traditional hammer drill.” Reform (July 2004), 45-47, doi:10.18948/shasetaikai.2004.3.0_1779.
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