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Physical and transport properties of bentonite-cement composites: A new material for in situ capping of contaminated underwater sediments

Publication ,  Journal Article
Tarabara, VV; Wiesner, MR
Published in: Environmental Engineering Science
September 1, 2005

Formulations of bentonite-cement composites are explored as a basis for creating a range of structured, semipermeable layers adapted to in situ capping of contaminated underwater sediments. In addition to being mechanically stable, such composites allow for control of cap microstructure and transport properties through the fine-tuning of postdepositional hydration processes in the cap. Microscopic studies combined with flowability and setting tests were used to establish relationships between the structural and mechanical properties of the composites. Apparent diffusion coefficients for transport through the caps were measured and corresponding porosity values were calculated for the composites formed under different hydration conditions. Analysis of calculated porosity values combined with microscopy data indicates that the particle packing density plays a crucial role in the development of cap's microstructural features and retardation capacity. © Mary Ann Liebert, Inc.

Duke Scholars

Published In

Environmental Engineering Science

DOI

ISSN

1092-8758

Publication Date

September 1, 2005

Volume

22

Issue

5

Start / End Page

578 / 590

Related Subject Headings

  • Environmental Engineering
  • 4104 Environmental management
  • 4011 Environmental engineering
  • 4004 Chemical engineering
  • 0907 Environmental Engineering
  • 0904 Chemical Engineering
  • 0502 Environmental Science and Management
 

Citation

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Tarabara, V. V., & Wiesner, M. R. (2005). Physical and transport properties of bentonite-cement composites: A new material for in situ capping of contaminated underwater sediments. Environmental Engineering Science, 22(5), 578–590. https://doi.org/10.1089/ees.2005.22.578
Tarabara, V. V., and M. R. Wiesner. “Physical and transport properties of bentonite-cement composites: A new material for in situ capping of contaminated underwater sediments.” Environmental Engineering Science 22, no. 5 (September 1, 2005): 578–90. https://doi.org/10.1089/ees.2005.22.578.
Tarabara, V. V., and M. R. Wiesner. “Physical and transport properties of bentonite-cement composites: A new material for in situ capping of contaminated underwater sediments.” Environmental Engineering Science, vol. 22, no. 5, Sept. 2005, pp. 578–90. Scopus, doi:10.1089/ees.2005.22.578.
Journal cover image

Published In

Environmental Engineering Science

DOI

ISSN

1092-8758

Publication Date

September 1, 2005

Volume

22

Issue

5

Start / End Page

578 / 590

Related Subject Headings

  • Environmental Engineering
  • 4104 Environmental management
  • 4011 Environmental engineering
  • 4004 Chemical engineering
  • 0907 Environmental Engineering
  • 0904 Chemical Engineering
  • 0502 Environmental Science and Management