AASHTO T 228-06 is identical to ASTM D 70-03 except for the following provisions:
1. Replace all references to the ASTM standards listed in the following table with the
corresponding AASHTO standards:
Referenced Standards
ASTM AASHTO
C 670 R 2
D 140 T 40
D 3142 T 295
2. Add the following to Section 2:
2.2 AASHTO Standard:
M 231, Weighing Devices Used in the Testing of Materials
3. Add an additional Section 6.4 as follows:
6.4 Balance—conforming to the requirements of M 231, Class B.
4. Delete the last sentence in Section 9.2 and replace with the following:
Use any convenient method to ensure that the beaker does not tip over in the bath and
circulation of the bath medium around the sample container is not restricted.
5. Replace Section 10.2 with the following:
10.2 Fill the pycnometer with freshly boiled distilled or deionized water at test temperature
and place the stopper in the pycnometer. Do not allow any air bubbles to remain in the
pycnometer. Place the filled pycnometer in the beaker.
6. Replace the last sentence in Section 11.1 with the following:
“Do not heat for more than 60 min over a flame or hot plate or for more than two hours in an
oven, and avoid incorporating air bubbles in the sample.”
7. Replace Section 11.3 with the following:
11.3 Fill the pycnometer with freshly boiled distilled or deionized water at test temperature
and place the stopper in the pycnometer. Do not allow any air bubbles to remain in the
pycnometer. Place the filled pycnometer in the beaker.
8. Replace Section 14 with the following:
14. Precision and Bias
14.1 Precision—Criteria for judging the acceptability of the relative density results obtained
by this method are given in Table 1.
14.1.1 Single-Operator Precision (Repeatability)—The figures in Column 2 of Table 1 are the
standard deviations that have been found to be appropriate for the conditions of test described
in Column 1. Two results obtained in the same laboratory, by the same operator using the
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