ASTM D3461 Test Method for Softening Point of Asphalt and Pitch
ASTM D3461 Standard Test Method for Softening Point of Asphalt and Pitch (Mettler Cup-and-Ball Method)
11. Report
11.1 Report the softening point, as indicated by the digital readout, to the nearest 0.1°C. If converting to degrees Fahrenheit, report to the nearest 0.2°F. Experience indicates that duplicate determinations are unnecessary. If any error occurs, or is suspected, in carrying out the details of this procedure, discard the results and make a second run.
12. Precision
12.1 The following criteria shall be used for judging the acceptability of any result (95 % confidence level):
12.1.1 Repeatability - Duplicate values by the same operator shall not be considered suspect unless they differ by more than 0.5°C.
12.1.2 Reproducibility - The values reported by each of two laboratories shall not be considered suspect unless they differ by more than 1.5°C.
12.1.3 Bias - The procedure in Test Method D3461 for softening point has no bias because the value of softening point is defined only in the terms of this test method.
13. Keywords
13.1 asphalt; mettler; pitch; softening point
