Application of solvlent change techniques to blended cements used to immobilize low-level radioactive liquid waste

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The microstructures of hardened portland and blended cement pastes, including those being considered for use in immobilizing hazardous wastes, have a complex pore structure that changes with time. In solvent exchange, the pore structure is examined by immersing a saturated sample in a large volume of solvent that is miscible with the pore fluid. This paper reports the results of solvent replacement measurements on several blended cements mixed at a solution:solids ratio of 1.0 with alkaline solutions from the simulation of the off- gas treatment system in a vitrification facility treating low-level radioactive liquid wastes. The results show that these ... continued below

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8 p.

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Kruger, A.A. July 1, 1996.

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  • Westinghouse Hanford Company
    Publisher Info: Westinghouse Hanford Co., Richland, WA (United States)
    Place of Publication: Richland, Washington

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The microstructures of hardened portland and blended cement pastes, including those being considered for use in immobilizing hazardous wastes, have a complex pore structure that changes with time. In solvent exchange, the pore structure is examined by immersing a saturated sample in a large volume of solvent that is miscible with the pore fluid. This paper reports the results of solvent replacement measurements on several blended cements mixed at a solution:solids ratio of 1.0 with alkaline solutions from the simulation of the off- gas treatment system in a vitrification facility treating low-level radioactive liquid wastes. The results show that these samples have a lower permeability than ordinary portland cement samples mixed at a water:solids ratio of 0.70, despite having a higher volume of porosity. The microstructure is changed by these alkaline solutions, and these changes have important consequences with regard to durability.

Physical Description

8 p.

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INIS; OSTI as DE96009887

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  • 2. international conference on improvements geosystems, Tokyo (Japan), 1 Jun 1996

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  • Other: DE96009887
  • Report No.: WHC-SA--2908-FP
  • Report No.: CONF-9606155--1
  • Grant Number: AC06-87RL10930
  • Office of Scientific & Technical Information Report Number: 240510
  • Archival Resource Key: ark:/67531/metadc672803

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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.

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  • July 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 8, 2016, 1:05 p.m.

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Kruger, A.A. Application of solvlent change techniques to blended cements used to immobilize low-level radioactive liquid waste, article, July 1, 1996; Richland, Washington. (digital.library.unt.edu/ark:/67531/metadc672803/: accessed November 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.