FIELD EXPERIMENTS ON SEALING PERMEABLE FINE SAND WITH BENTONITE

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

Media Info

Subject/Index Terms

Filing Info

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