Report a normal test as the ductility of the sample. If a
normal test is not obtainable, report the ductility as being
unobtainable under the conditions of the test. If rupture does
not occur due to length limitations of the testing machine,
report ductility as the length limitation in cm+ (for example,
150 cm+). If this testing is performed on less than three
replicates of the same sample due to insufficient material,
include the number of replicates used in the test report.
6.4 In the event of a discrepancy, the referee method shall be
to perform the test using three replicates. If the discrepancy
involves a distillation residue, pour the material through a
300-µm (No. 50) sieve that has been preheated at 135 6 5°C
(275 6 10°F) prior to pouring into test molds. Report the
average of three normal tests as the ductility of the sample.
7. Precision and Bias
7.1 Criteria for judging the acceptability of ductility test
results at 25°C (77°F) obtained by this test method are shown
in Fig. 2.
NOTE 4—The precision statement for ductility, as presented in Fig. 2, is
based on tests performed on asphalt cements. The precision of tests on
residues, such as those obtained by Test Methods D1754 and D2872, have
not been established.
NOTE 5—The numbers plotted in Fig. 2 represent the (1S) and (D2S)
limits for single operator precision and multilaboratory precision as
described in Practice C670.
NOTE 6—Insufficient data are available to properly define precision at
15.6°C. However, analysis of data resulting from tests by 13 laboratories
on one asphalt for which the average ductility test result was 45 cm shows
a multi-laboratory precision (D2S) of 23 cm.
8. Keywords
8.1 ductility; ductility mold; ductilometer