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|Title:||Evaluation of MO-MAT 158 as light-duty landing mat|
|Authors:||United States. Army Materiel Command.|
Smith, Carroll J.
|Publisher:||U.S. Army Engineer Waterways Experiment Station.|
Engineer Research and Development Center (U.S.)
Abstract: This investigation was conducted to evaluate MO-MAT, a reinforced plastic material molded into a waffle-like configuration, for use as light-duty landing mat. Tests were conducted on four special panels of MO-MAT 158 connected by nut plates with bolts placed in predrilled holes. The traffic tests were conducted using C-130 aircraft loading on three prepared subgrades of different strengths. Results of this investigation indicated that MO-MAT 158 will sustain 96, 181, and 500 actual coverages of traffic when placed on subgrades with rated CBR's of 4.0, 6.5, and 10, respectively. Therefore, the MO-MAT 158 does not meet the Qualitative Materiel Requirement (OMR) for a light-duty mat (1000 coveraees on a 4-CBR sub grade). The MO-MAT 158 panels were assembled at an average rate of 150 sq ft per man-hour, which does not meet the minimum QMR placing rate requirement of 400 sq ft per man-hour. The average coefficients of friction obtained from wet- and dry-skid tests were 0.30 and 0.45, respectively. Therefore, the coefficient of friction on a wet surface falls below the QMR coefficient of friction range of 0.11 to 0.8. Tire wear during the wet-skid tests was negligible, but small pieces of rubber were peeled from the tire during the dry-skid tests. The longitudinal and transverse joints did not provide waterproof connections; also, the longitudinal joint plastic nut plates were not strong enough to secure the bolted overlapping panels when the mat was placed on a 4-CBR subgrade. Due to hazards created when aircraft touch down short of a runway and due to possible difficulty during installation, the anchorage system used in this investigation is not considered feasible for field use. It is recommended that no further consideration be given to use of MO-MAT 158 as light-duty landing mat. NOTE: This file is large. Allow your browser several minutes to download the file.
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