Engineer Design Test of Modified XM19 Special Surfacing Landing Mat.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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The standard XM19 was modified by using a thicker top skin and this mat was designated XM19 special surfacing. The mat was traffic tested with the medium-duty loading consisting of a 25,000-lb single-wheel load SWL on a tire inflated to 250-psi pressure. The mat supported in excess of 1600 coverages of the above loading on a subgrade strength of 4 CBR, which is 60 over the required coverages. The coefficients of friction of the mat surface of 0.62 dry and 0.53 wet are within the acceptable limits of 0.80 and 0.40 as specified by the QMR. The mats sustained the required 20 passes of the load cart in the same spot over a l-in.-diam arresting cable without fracture of the top mat surface. The blast test of 300F for 5 sec did not cause any detrimental effects, and the mats successfully passed laboratory tests for compressive, shear, and flexural strength. Modified author abstract
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