Bentonite Sealing Methods Compared in the Field

by Myron B. Rollins, Soil Sci.; Bur. of Land Mgmt., USDI Prineville, OR; Agric. Res. Service, Soil and Water Conservation Res. Div., USDA, Reno, NV,
Anthony S. Dylla, Agric. Engr.; USDA, Agric. Res. Service, Soil and Water Conservation Res. Div., Reno, NV,

Serial Information: Journal of the Irrigation and Drainage Division, 1970, Vol. 96, Issue 2, Pg. 193-203

Document Type: Journal Paper

Errata: (See full record)

Abstract: Two field studies were designed to test methods of sealing with bentonite. Twelve small reservoirs were constructed at each site. Utah bentonite was installed as the following types of seals: (1) waterborne-harrowed, (2) waterborne-over-a-gravel surface, (3) surface blanket, (4) buried blanket, and (5) buried membrane. The waterborne-harrowed seals were short lived. The waterborne seals on reservoirs with graveled surfaces were effective only slightly longer, becoming ineffective after the third season. The 4-in. surface blanket seals were more durable, their effectiveness lasting about five seasons. The buried blanket and buried membrane seals proved to be the best, retaining 60% effectiveness 6 yrs. after installation. Seal costs varied from $0.20 to $1.30 per sq yd of soil surface. These costs are comparable with other methods of sealing, such as plastics.

Subject Headings: Sealing | Bentonite | Reservoirs | Field tests | Membranes | Seasonal variations | Plastics | Construction sites | Utah | North America | United States

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