MIL-R-52453C(ME)
4.3.2 Initial production roller inspection. When specified (see 6.2), one or more rollers will be selected at random by the Government from the rollers being produced and will be examined as specified in 4.4 and tested as specified in 4.3.3.1 through 4.3.3.9 to determine conformance to the requirements of this specification. Acceptance of an initial production roller shall not exclude the remaining roller from the quality conformance inspection and acceptance provisions specified in Section 4.
4.3.3 Tests.
4.3.3.1 Test conditions. Unless otherwise specified in a test, tests shall be performed
without shelter and at the climatic conditions existing at the place of test. The roller shall operate
as specified herein without maintenance other than the contractor's recommended normal scheduled maintenance as established by a maintenance schedule prepared and submitted by the contractor prior to test.
4.3.3.2 Compaction rate. The fill material shall correspond to Group GP or GW of the Unified Soil Classification System conforming to SAE J106. The compacted fill strip shall be rectangular, and not less than 24 feet wide. The fill may be placed prior to the start of compaction operation or during compactions. Before testing is started, soil's moisture content is to be determined and a test strip of the material is to be rolled. Hauling equipment shall not be run over spreaded uncompacted fill material before or after dumping the material. Spreading of fill material shall be done with a grader. Spreading runs shall be only that necessary to reach the estimated uncompacted fill lift. Water distribution equipment may be used as required. The material to be compacted shall be of sufficient thickness to give a compacted lift of at least
6 inches. The laboratory density of the soil to be compacted shall be determined in accordance
with ASTM D1557, method optional. The Government reserves the right to witness any laboratory testing. When the contractor feels that compaction of 400 compacted cubic yards of fill to a density of 95 percent Modified AASHO has been accomplished, he may stop compaction operations. Time used in density testing shall not be counted as compaction time. Two density samples shall be taken at each 25 foot station. The first sample shall be taken 7 feet left of the centerline, and the second sample 9 feet right of the centerline. This pattern shall be repeated for the length of the fill. In addition, another 3 samples shall be taken at random locations every
30 feet. Volume of compacted soil shall be determined as follows:
a. Stake out the fill in 25 foot stations.
b. With a surveyor's level and rod, determine the elevations of the left edge, right edge, and centerline at each station before placing the fill and again after compaction. Determine the compacted lift thickness.
c. Determine the compacted width at each station.
d. Compute the volume using the average end area method.
A compaction rate of less than 270 compacted cubic yards per hour and failure to achieve a compacted lift thickness of at least 6 inches shall constitute failure of this test. Density testing
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