Laser ablation studies of concrete

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Laser ablation was studied as a means of removing radioactive contaminants from the surface and near-surface regions of concrete. The authors present the results of ablation tests on cement and concrete samples using a 1.6 kW pulsed Nd:YAG laser with fiber optic beam delivery. The laser-surface interaction was studied using cement and high density concrete as targets. Ablation efficiency and material removal rates were determined as functions of irradiance and pulse overlap. Doped samples were also ablated to determine the efficiency with which surface contaminants were removed and captured in the effluent. The results show that the cement phase of ... continued below

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11 p.

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Savina, M.; Xu, Z.; Wang, Y.; Reed, C. & Pellin, M. October 20, 1999.

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Description

Laser ablation was studied as a means of removing radioactive contaminants from the surface and near-surface regions of concrete. The authors present the results of ablation tests on cement and concrete samples using a 1.6 kW pulsed Nd:YAG laser with fiber optic beam delivery. The laser-surface interaction was studied using cement and high density concrete as targets. Ablation efficiency and material removal rates were determined as functions of irradiance and pulse overlap. Doped samples were also ablated to determine the efficiency with which surface contaminants were removed and captured in the effluent. The results show that the cement phase of the material melts and vaporizes, but the aggregate portion (sand and rock) fragments. The effluent consists of both micron-size aerosol particles and chunks of fragmented aggregate material. Laser-induced optical emission spectroscopy was used to analyze the surface during ablation. Analysis of the effluent showed that contaminants such as cesium and strontium were strongly segregated into different regions of the particle size distribution of the aerosol.

Physical Description

11 p.

Notes

INIS; OSTI as DE00750549

Medium: P; Size: 11 pages

Source

  • ICALEO '99, San Diego, CA (US), 11/15/1999--11/18/1999

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  • Report No.: ANL/CHM/CP-100261
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 750549
  • Archival Resource Key: ark:/67531/metadc710340

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • October 20, 1999

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 6, 2017, 7:39 p.m.

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Savina, M.; Xu, Z.; Wang, Y.; Reed, C. & Pellin, M. Laser ablation studies of concrete, article, October 20, 1999; Illinois. (digital.library.unt.edu/ark:/67531/metadc710340/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.