Bentonite has excellent sealing powers. Treating permeable fine sand with bentonite saved up to 99 percent of the water previously lost through seepage. From less than 1 up to 2 lb of bentonite per square foot of sand surface was applied by adding a prepared bentonite suspension to the water or by mixing it dry with the sand. After drying for 1 month and then rewetting, the seals were 75-80 percent effective. Winter weather and particularly severe winds damaged the bentonite seals still further, reducing them to between 30-60 percent effectiveness. At the close of 2 yr of experimentation, including 5 wetting and drying cycles, the bentonite seals were 27-44 percent effective. It is estimated that 1 bentonite seal would cost about the same as the annual cost of 4 in. of concrete amortized over a 30-yr period at 6 percent interest. Therefore, bentonite does appear favorable as a competitive sealer, since 1 application of bentonite may be effective for more than 1 yr. Simple and effective methods of establishing bentonite seals must be further developed before this sealing method can be fully utilized to effectively reduce seepage losses. /AUTHOR/

  • Supplemental Notes:
    • Also published in Geoscience Abstracts, V 17; No 8; Aug 65, PP100-101.
  • Corporate Authors:

    Soil Science Society of America

    677 South Segoe Road
    Madison, WI  United States  53711
  • Authors:
    • Rollins, M B
  • Publication Date: 1964

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Filing Info

  • Accession Number: 00263975
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 31 1974 12:00AM