Abstract
Thermal lance is one of the methods for concrete cutting/piercing. The burning lance not only provides high temperature to melt the concrete target in the form of lava, but also has a eutectic effect changing the lava melting temperature. The eutectic effects by adding lance material such as FeO, Al2O3 and TiO2 to concrete (SiO2-CaO) system are discussed. The discussion and concrete piercing experiments both show that, due to eutectic generation effects, aluminum and titanium modified lances are not effective on concrete objects although these lances provide high lance temperature. Iron based lance is the most effective thermal lance due to its eutectic generation effect. Experimental results of cutting improvement by using chemically modified iron lance are presented and the eutectic generation effect in this process is discussed.
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References
E. Brandenburger, Metal Constr. (1975) 617.
G. Szychlinski, Concr. Intern. (October 1985) 51.
I. L. Davies, C. C. Fleischer and A. A. Paton, Nucl. Eng. Intern. 32(1987) 45.
J. S. Brower, "Underwater Cutting Rod," U.S. Patent 4,069,407 (1978).
J. S. Brower, "Underwater Cutting Rod," U.S. Patent 4,182,947 1980.
N. L. Bowen, J. F. Schairer and E. Posnjak, Amer. J. Sci. XXVI(1933) 192.
R. C. Devries, R. Roy and E. F. Osborn, J. Amer. Ceram. Soc. 38(1955) 158.
J. F. Schairer, ibid. 25(1942) 241.
V. Hlavacek and P. Pranda, "High-Speed Chemical Drill," U.S. Patent Application.
S. Gordon and B. J. Mcbride, NASA Refer. Publ. (1996) 1311.
Y. Malier, in 2nd RILEM International Symposium on De-molition and Reuse of Concrete and Masonry (Chapman and Hall, London, 1988) Vol. 1, p. 236.
N. A. Toropov, V. P. Barzakovskii, V. V. Lapin and N. N. Kurtseva, "Handbook of Phase Diagrams of Silicate" (Israel Program for Scientific Translations, Jerusalem, 1972).
REA Staff of Research and Education Association, "Handbook of Concrete Technology and Masonry Construction" (The Association, New York, 1981).
D. B. Wilson, T. A. Steinberg and J. M. Stoltzfus, "Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres" (ASTM, West Conshohocken, 1997) p. 240.
H. Wang, P. Pranda and V. Hlavacek, accepted by Chemical Engineering Communications.
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Wang, H., Pranda, P. & Hlavacek, V. The eutectic generation effect and chemical modification of thermal lance cutting of concrete. Journal of Materials Science 39, 7003–7008 (2004). https://doi.org/10.1023/B:JMSC.0000047544.44078.ca
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DOI: https://doi.org/10.1023/B:JMSC.0000047544.44078.ca