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Title: Evaluation of thin steel membranes
Authors: United States. Army Materiel Command.
Watkins, James E.
Keywords: Membranes
Steel membranes
Load tests
Clay soils
Dynamic testing
Publisher: U.S. Army Engineer Waterways Experiment Station.
Engineer Research and Development Center (U.S.)
Description: Miscellaneous Paper
Abstract: This investigation was conducted to evaluate the load-distributing capability of thin, very high-strength steel membrane. A test section was constructed of uniform-strength heavy clay and surfaced as follows: 15-mil steel membrane, 11-mil steel membrane, and neoprene-coated nylon membrane placed directly on the subgrade; 15-mil steel membrane over subgrade sprayed with an asphalt tack coat; and one unsurfaced area. The test section was trafficked with a test cart with a 20.00-20.00, 22-ply C-130 aircraft tire inflated to 85 psi loaded with 30,000 lb. Observations and tests were made to evaluate the performance of the various membranes and the subgrade. Laboratory tests of the tensile strength of the steel membranes were made. Based on the results obtained by this study, it was concluded that: (A.) When placed on a subgrade of 5- to 6-CBR strength and trafficked with the load cart described above, neither the 11-mil nor the 15-mil steel membrane exhibited any appreciable load-distributing capacity. (B.) Application of an asphalt tack coat on the subgrade did not materially improve the performance of the steel membrane. (C.) Although very high in tensile strength, the steel membranes used in this test did not withstand the differential stresses and flexing imposed by rolling-wheel traffic. NOTE: This file is large. Allow your browser several minutes to download the file.
Rights: Approved for public release; distribution is unlimited.
Appears in Collections:Miscellaneous Paper

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