VISCOELASTIC ANALYSIS OF THE MARSHALL TEST

SINCE MOST OF THE POPULAR AND BETTER CORRELATED TESTS PRESENTLY EMPLOYED IN THE DESIGN OF MIXES FOR PAVEMENTS ARE NOT BASED ON VISCOELASTIC THEORY OR THE RHEOLOGICAL IMPLICATIONS OF THESE TESTS ARE HIDDEN, A STUDY WAS CONDUCTED INTO THE RHEOLOGICAL MEANING OF ONE SUCH PROCEDURE, THE MARSHALL TEST. STRESS-RELAXATION TESTS WERE CONDUCTED WITH MODIFIED MARSHALL EQUIPMENT AND USING THE STANDARD MARSHALL TEST SPECIMENS. CORRELATIONS WERE MADE BETWEEN /A/ AND STABILITY/FLOW VALUES BY THE MARSHALL TEST, /B/ THE STRESS-RELAXATION DATA OBTAINED WITH MARSHALL EQUIPMENT, AND /C/ TESTS WITH TRIAXIAL SIZE SPECIMENS /4X8/. VARIOUS SHIFT FACTORS WERE EMPLOYED ON THE STRESS-RELAXATION DATA FOR DIFFERENT ASPHALT CONTENTS IN ORDER TO DETERMINE THE RATE OF RELAXATION AS A FUNCTIONAL OF TEMPERATURE. AN ATTEMPT WAS MADE TO PREDICT THE ENGINEERING MODULUS OF THE MATERIAL FROM THE MARSHALL LOAD-DEFORMATION VALUES OF THE MARSHALL TEST BY MEANS OF A SHAPE FACTOR. THE UNIVERSAL APPLICABILITY OF THIS SPECIMEN SHAPE /OR DIMENSION/ FACTOR HAS YET TO BE DETERMINED FOR DIFFERENT AGGREGATE GRADATIONS ALTHOUGH IT SEEMS TO BE INDEPENDENT OF ASPHALT CONTENT. DYNAMIC TESTS WERE ALSO CONDUCTED TO FURTHER VERIFY THE SHORT TIME STRESS-RELAXATION MODULUS OF THE MATERIAL AND THE RELATION OF THE DYNAMIC MODULUS TO LOW-TEMPERATURE MARSHALL RELAXATION MODULUS.

• Supplemental Notes:
  • Vol33, Pp406-436
• Authors:
  • Krokosky, E M
  • Chen, J P
• Conference:
  • Assoc Asphalt Paving Technol Proc
• Publication Date: 1964-2

Subject/Index Terms

• TRT Terms: Aggregate gradation; Aggregates by shape and surface texture; Analysis; Asphalt content; Dynamic tests; Flow measurement; Marshall test; Mechanical relaxation; Rheology; Stability analysis; Temperature; Testing; Viscoelasticity
• Uncontrolled Terms: Aggregate shape
• Old TRIS Terms: Marshall stability marshall stability & flow test flow; Relaxation time
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00210291
• Record Type: Publication
• Source Agency: National Asphalt Pavement Association (NAPA)
• Files: TRIS
• Created Date: Mar 24 1994 12:00AM