Effects of laser radiation on the cementitious materials - three case studies

• Autorzy: Klemm A. J. , Rożniakowski K.
• Języki publikacji: EN

Abstrakty

EN

Laser processing is unarguably associated with some alterations of cementitious materials' geometrical microstructure and chemical composition. Since high temperature is involved in the laser cleaning process, the chemical composition of surfaces may change, followed by crack development and subsequent changes of roughness. The relationship between laser treatment and substrate parameters is a two-way relationship. The great variation in absorptivity of highly developed surfaces of cementitious materials results in substantial differences in their responses to laser irradiation. Paper presents selected results of three investigations on the effect of laser radiation on characteristics of porous cementitious materials.

Słowa kluczowe

EN

laser radiation; cementitious materials; temperature effects; surface modification

PL

promieniowanie laserowe; materiały cementowe; efekt temperaturowy; modyfikacje powierzchni

• Wydawca: Instytut Fizyki Budowli Katarzyna i Piotr Klemm S.C.
• Czasopismo: Fizyka Budowli w Teorii i Praktyce
• Rocznik: 2009
• Tom: T. 4
• Strony: 79--84
• Opis fizyczny: Bibliogr. 12 poz.

Twórcy

autor

Klemm A. J.

autor

Rożniakowski K.

• Glasgow Caledonian University,

Bibliografia

• [1] Schmidt, M. J.J., Li L., Spencer J.T. An investigation into the feasibility and characteristics of using a 2.5k W high power diode laser for paint stripping. Journal of Materials Processing Technology 138 (2003) 109-115.
• [2] Georgali, B., Tsakiridis P.E. Microstructure of fire damaged concrete. A case study, Cement and Concrete Composites 27(2) (2005) 255-259.
• [3] Lin L.I., Steen W.M., Modern P.J. and Spencer J.T., Laser removal of surface embedded contaminations on/in building structures, Laser Materials Processing and Machining, SPIE: 2246, 1994.
• [4] Schmidt M.J.J., Li L. Surface modification of OPC- based cent using a frequency doubled Nd:YAG laser system. Applied Surface Science 186 (2002).
• [5] Rao, B. T., H. Kumar and A. K. Nath,. Processing of concretes with a high power CO2 laser. Optics & Laser Technology 37(2005)348-356.
• [6] Matsui, I., Nagai K., Yuasa N., Ishigami Y. Removing graffiti on concrete surface by laser. Proceeding of the International Congress "Challenges in Concrete Construction" Dundee, 2002.
• [7] Lawrence, J., A comparative analysis of the wear characteristics of glazes generated on the ordinary Portland cement surface of concrete by means of CO2 and high power diode laser radiation, Wear 257 (2004) 590-598.
• [8] Lawrence, J. and Li L. The effects of process gas type on the surface condition of high-power diode laser-treated ordinary Portland cement. Optics and Lasers in Engineering 36 (2001) 599-605.
• [9] Klemm P, Rożniakowski K, Klemm A J Some experimental results of interaction of strong impulse of laser radiation with the surfaces of high performance concrete Proceedings of the 7th International Conference on Structures under Shock and Impact", Montreal 2002
• [10] Klemm A J, Klemm P, Rożniakowski K Modification of concrete surfaces by laser radiation ICCRRR 2005, Cape Town, South Africa
• [11] Sanjeevan P, Klemm A J, Klemm P Removal of graffiti from the mortar by using Q-Switched Nd:YAG Laser Applied Surface Science, 253(20) (2007) 8543-8553
• [12] Klemm A. J., Sanjeevan P., Klemm P. Micro-scale alterations of cementitious surfaces subjected to laser cleaning process and their potential impact on long term durability 2nd ICCRRR 2008, Cape Town, South Africa