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|Title:||Evaluation of experimental polyurethane-coated membranes|
|Authors:||United States. Army Materiel Command.|
Vollor, Timothy W.
|Publisher:||Soils and Pavements Laboratory (U.S.)|
Engineer Research and Development Center (U.S.)
Abstract: Laboratory and field tests were conducted at the U.S. Army Engineer Waterways Experiment Station (WES) to evaluate experimental polyurethane-coated (PUC) membranes and materials that showed promise of improving the performance of membranes used to surface assault-type airfields for operation of C-130 aircraft. Six membranes were evaluated during this investigation. Because considerable test data had been collected previously at WES on T17 and WX18 membranes, these were used for comparison. The WX18 membrane strength properties were considered desirable. Of the six PUC experimental membranes tested in the laboratory, three were selected for field evaluation. The polyurethane coatings on all three of the latter membranes withstood the abrasive action of the simulated skid tests of the C-130 aircraft better than the neoprene coatings of the T17 and WX18 membranes. Also, all three of these PUC membranes performed better during field tests with the simulated C-130 aircraft skids than the T17 membrane; however, none of them performed as well as the WX18 membrane. The polyurethane coatings did not perform as well as the neoprene coatings after storage. The polyurethane coatings deteriorated to a useless state during the 3-year storage tests. The rate of deterioration of the coatings was such that the three PUC membranes became unsuitable for use at different periods of time. Since field construction joints and repairs to membranes require use of an adhesive, liquid adhesives designed for field application with the PUC membranes were also evaluated. The results of laboratory tests performed on three adhesives indicated that no adhesive tested was suitable for the intended use. To provide an adequate braking surface during inclement weather, nonskid compounds were applied to the membrane surfacings. Two nonskid compounds which had been tested previously and found acceptable for use with neoprene-coated membranes were also applied to the PUC membranes for test purposes. Both nonskid compounds tested proved to be acceptable for use with the PUC membranes.
|Rights:||Approved for public release; distribution is unlimited.|
|Appears in Collections:||Technical Report|
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