Precision of Marshall Stability and Flow Test Using 6-in. (152.4-mm) Diameter Specimens.
Precision of Marshall Stability and Flow Test Using
6-in. (152.4-mm) Diameter Specimens.
Kandhal, P. S.; Wu, Y.; Parker, F., Jr.; Spellerberg, P.
Journal of Testing and Evaluation (JTEVA), Vol. 24, No.
1, 20-25, January 1996.
stability; flow measurement; asphalt; large stone mixes;
marshall stability; marshall flow; percent voids; data
analysis; precision statement
Earlier studies have shown that the repeatability of
Marshall stability, flow, and air voids content
measurements on 6-in. (152.4-mm) diameter specimens of
large stone mixes is better than the repeatability on
4-in. (101.6-mm) diameter specimens. A round robin
study involving twelve participating laboratories was
conducted to provide information for developing a
precision statement for the ASTM Test Method for
Resistance to Plastic Flow of bituminious Mixtures Using
Marshall Apparatus (6 inch-Diameter Specimen) (D 5581).
Difference two-sigma (d2s) limits were developed to
determine acceptable single and multilaboratory
differences for bulk specific gravity, percent voids,
Marshall stability, and Marshall flow measurements.
Analysis of other data collected during the study
indicated that stability and flow measurements are not
sensitive to minor differences in various 6-in.
(152.4-mm) diameter breaking heads currently in use.