00741959

Component

https://doi.org/10.3141/1577-04

http://scholar.google.com...pson&publication_year=1997

Six granular materials were used as base and subbase materials in the flexible pavement test sections for the Minnesota Road Research (Mn/ROAD) project. Crushed/fractured particles are not allowed in aggregate classes CL-1Fsp, CL-1Csp, CL-3sp, and CL-4sp. Ten to fifteen percent crushed/fractured particles are required for CL-5sp. One hundred percent crushed/fractured particles are required for CL-6sp. A comprehensive laboratory testing program was established to determine pertinent engineering properties of the granular materials. Rapid shear tests and repeated-load tests were conducted to determine the shear strength parameters (friction angle and cohesion), resilient modulus, rutting potential, stress history effects on shear strength, and moisture susceptibility. The results from the rapid shear tests and permanent deformation tests show that the rutting potential of a granular material can be characterized from rapid shear test at a confining pressure of 15 psi (103.35 kPa). The rutting parameter A was a function of the shear strength of the granular materials. The shear strength results obtained from rapid shear tests performed at a confining pressure of 15 psi reflect the rutting trends observed in the low-volume road test sections at the Mn/ROAD project. Results from repeated-load tests were used to develop the parameters for K-theta, UT-Austin, and Uzan's models for evaluating the resilient modulus of granular materials. The axial strain values calculated from the resilient modulus models appear to be in good agreement with the measured axial strain values, except for the very low shear strength material CL-1Csp.

This paper appears in Transportation Research Record No. 1577, Pavement Base and Foundation Materials, Deformation Characteristics of Subgrade, and Properties of Unconventional Aggregates.

English

p. 27-36

1997

Transportation Research Record

0309061598

Figures (7) ; References (10) ; Tables (7)

Accelerated tests; Base course (Pavements); Calculation; Cohesion; Confining pressure; Flexible pavements; Friction; Granular materials; Laboratory tests; Measurement; Modulus of resilience; Moisture content; Properties of materials; Repeated loads; Rutting; Shear strength; Shear tests; Strain (Mechanics); Subbase (Pavements); Test sections; Triaxial shear tests

Axial strain; Friction angle; Moisture susceptibility; Subbase; Triaxial tests

Geotechnology; Highways; Materials; I36: Aggregates

TRIS, TRB, ATRI

Oct 20 1997 12:00AM

• ALTERNATIVE METHOD OF DETERMINING RESILIENT MODULUS OF COMPACTED SUBGRADE SOILS USING FREE-FREE RESONANT COLUMN TEST
• ANISOTROPIC MODELING OF GRANULAR BASES IN FLEXIBLE PAVEMENTS
• APPLICATION OF GEOTECHNICAL CENTRIFUGE TESTING TO EVALUATE UNCONVENTIONAL HIGHWAY MATERIALS
• BEHAVIOR OF SOME PAVEMENT FOUNDATION MATERIALS UNDER REPEATED LOADING
• CHEMICAL APPROACH TO FORMATION OF CALCITE PRECIPITATE FROM RECYCLED CONCRETE AGGREGATE BASE LAYERS
• FIELD PERFORMANCE AND MITIGATION OF SHREDDED TIRE EMBANKMENT
• FIELD VERIFICATION OF LABORATORY RESILIENT MODULUS MEASUREMENTS ON SUBGRADE SOILS
• GEOTECHNICAL AND ENVIRONMENTAL CHARACTERISTICS OF ATMOSPHERIC FLUIDIZED BED COMBUSTION ASH AND STOKER ASH
• KANSAS EXPERIENCE WITH STRATEGIC HIGHWAY RESEARCH PROGRAM WASHINGTON HYDRAULIC FRACTURE INDEX TEST
• PERSPECTIVES ON LIABILITY FOR CONSTRUCTIVE REUSE OF HIGH-VOLUME WASTE STREAMS
• SEASONAL VARIATION OF BACKCALCULATED SUBGRADE MODULI
• SHEAR AND DEFORMATION CHARACTERISTICS OF MUNICIPAL WASTE COMBUSTOR BOTTOM ASH FOR HIGHWAY APPLICATIONS
• USING SUCTION AND DIELECTRIC MEASUREMENTS AS PERFORMANCE INDICATORS FOR AGGREGATE BASE MATERIALS