MIL-DTL-82604A (OS)
4.3.2 Sample for tests. A 10-pound sample of asphaltic compound shall be taken at
random from each lot in accordance with ASTM D 140. The sample material shall be chosen at
random from containers of "solidified" compound. A sample for the tests of 4.5.3 through
4.5.10, herein, shall be preconditioned for testing in accordance with 4.5.2. The sample for
tests of 4.5.1 need not be preconditioned. The lot shall be unacceptable if it fails to meet all the
requirements of this specification, except as noted in 4.3.
4.3.2.1 Sampling. Each container shall be labeled with complete information on the lot and
batch number, date of sampling, contract number, and applicable specification.
4.3.3 Sample for examination of filled containers. A random sample of filled containers
shall be selected from each lot of compound in accordance with MIL-STD-1916, Verification
Level II.
4.4 Inspection procedure.
4.4.1 General. Unless otherwise specified, the values specified in section 3 apply to the
results obtained from one determination for each particular test.
4.4.2 Visual examination. Conformance of the asphaltic compound to the requirement for
workmanship (3.1.4) and any other requirements not covered by specific tests shall be
determined by appropriate visual examination.
4.4.3 For examination, of preparation for delivery. Using the sample of filled containers
selected in 4.3.3, the sample shall be adjusted to conform to MIL-STD-1916, Verification Level
II. The sample unit shall be one filled and closed shipping container. Sample containers shall
be examined for compliance with all requirements of this specification in regard to contents,
closure, damaged or leaking container, improper container, and marking.
4.5 Test methods and procedures.
4.5.1 Chemical requirements.
4.5.1.1 Manganese. Weigh a 10- (g) sample of the compound, dissolve in 10 ml of
concentrated nitric acid, and filter if necessary. Dilute to 100 ml with distilled water and transfer
a 20 ml aliquot of the solution to a 250-ml beaker. Add 1 g of lead peroxide and boil. Note if
manganese is present by the development of a red coloration in the solution. If the presence of
manganese is indicated, filter through asbestos and titrate the clean filtrate with N/10 oxalic acid
until the red coloration disappears. Calculate the percentage of manganese in the sample as
follows:
Percentage of manganese = 1.099VN
W
Where:
V = ml of N/10 oxalic acid used
N = normality of oxalic acid
W = weight of sample
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