AASHTO T 49-15 pdf free download

AASHTO T 49-15 pdf free download.Penetration of Bituminous Materials.
AASHTO T 49-15 is identical to ASTM D5/D5M-13 except for the following provisions:
Replace all references to ASTM D36 with AASHTO T 53.
2. Add the following to Section 2:
2.4 Federal Standard:
• Fed. Std. No. 29, CFR 19 10.1200 OSHA Hazard Communication Standard; see also Permissible Exposure Limits—Annotated Tables, available at
https://www. osha.gov/dsg/an notated-pel sI
Replace the last sentence of Section 6.1 with the following:
The weight of the spindle shall be checked.
3. Add the following sentence to the end of Section 7.2:
If air bubbles are visible in the surface of the specimen, briefly flash the top of the specimen with a flame.
4. Replace Section 11 with the following:
11. Precision and Bias
11.1 Precision—Criteria for judging the acceptability of penetration of asphalt binder results obtained by this method are given in Table X.
Note: Precision data for penetration on asphalt residue of emulsified asphalt can be found in
T59.
11.1.1 Single-Operator Precision (‘Repeatabilitv—The figures in Column 2 of Table X 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 same equipment, in the shortest practical period of time, should not be considered suspect unless the difference in the two results exceeds the values given in Table X, Column 3.
11 .1 .2 Multilaboratorv Precision (Reproducibilitv,—The figures in Column 2 of Table X are the standard deviations that have been found to be appropriate for the conditions of test described in Column 1. Two results submitted by two different operators testing the same material in different laboratories shall not be considered suspect unless the difference in the two results exceeds the values given in Table X, Column 3.11.2 Bias- -No information can be presented on the bias of the procedure because no comparison with a material having an accepted reference value was conducted.AASHTO T 49-15 pdf download.