ISSN: 1945-7553
CODEN: JTEVAB
Page Count: 4

Flow and Stability Limits for Six-Inch-Diameter Marshall Specimens

Newtson, CM
Graduate research assistant and associate professors, University of Wyoming, Laramie, WY

Turner, JP
Graduate research assistant and associate professors, University of Wyoming, Laramie, WY

Schmidt, RJ
Graduate research assistant and associate professors, University of Wyoming, Laramie, WY

(Received 12 March 1992; accepted 18 September 1992)

Abstract

Finite element analyses were conducted to determine appropriate specifications for limits on flow and stability of 6-in. (152.4-mm) diameter specimens in the Marshall procedure for mix design of bituminous concrete. Loads and deformations on 6-in.-diameter specimens were determined that result in a state of stress similar to that in 4-in. (101.6-mm) diameter specimens at initiation of yield. From these results, dimensionless scaling factors were determined by which stability and flow specifications for 4-in.-diameter specimens can be multiplied to determine appropriate limits for 6-in.-diameter specimens. These analyses provide a more rational basis for evaluation of stresses and deformations that occur in the Marshall test than has been provided previously. The results yielded scaling factors of 1.50 for flow and 2.25 for stability, which verify the results of experimental results reported in the literature.

Keywords:
Marshall Test, flow, stability, bituminous concrete, finite element analysis, large-stone bituminous concrete, mix design

Paper ID: JTE11753J
DOI: 10.1520/JTE11753J
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