00345303

Component

http://onlinepubs.trb.org...s/trr/1981/810/810-004.pdf

https://scholar.google.co...czak&publication_year=1981

A comprehensive evaluation of nonlinear resilient modulus test results on granular materials is presented. A total of 271 test results obtained from 10 different research agencies were used as the data base. The main objectives of the study were to (a) determine whether typical M sub r relations exist for various granular materials; (b) develop a comprehensive summary of factors that affect the M sub r response and determine whether predictive equations or typical relations could be stated; and (c) investigate whether a correlation exists between laboratory-measured M sub r and laboratory-measured California bearing ratio (CBR) values. The results indicate that there appears to be an inverse relationship between K sub 1 and K sub 2 (M sub r = K sub 1 theta to the K sub 2 power) for all granular materials. Six unique K sub 1 and K sub 2 relations are proposed for six different granular material types (silty sands, sand gravels, sand aggregate blends, crushed stone, limerock, and slag). Predictive equations are developed to relate the primary variables that influence the M sub r response of six different aggregates (used by the Maryland State Highway Administration). The equations use bulk stress, degree of saturation, and percentage of modified compaction. Typical M sub r equations are also stated to reflect probable influences of the K sub 1 and K sub 2 values due to compaction and moisture for the Maryland aggregates. Based on an analysis of nearly 100 data pairs, a general, but variable, correlation was found between laboratory-measured M sub r and CBR values. However, the constant that relates these variables is a function of stress state. For typical bulk stress values anticipated in highway pavement structures, the coefficient (constant) value is significantly lower than the 1500-value suggested by Huekelom and Foster. (Author)

Publication of this paper sponsored by Committee on Strength and Deformation Characteristics of Pavement Sections. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01411129

pp 23-33

1981

Transportation Research Record

0309032512

Print

Figures (9) ; References (26) ; Tables (7)

Aggregates; Compaction; Crushed rock; Data analysis; Equations; Granular materials; Granulated slag; Gravel; Laboratory tests; Limestone; Mathematical analysis; Modulus of resilience; Nonlinear systems; Percent saturation; Sand; Silty sands; Stresses

Nonlinearity

Geotechnology; Highways; I42: Soil Mechanics

TRIS, TRB

Jan 29 1982 12:00AM

• ANALYSIS OF PAVEMENTS WITH GRANULAR BASES
• CONSTITUTIVE EQUATION FOR PERMANENT STRAIN OF SAND SUBJECTED TO CYCLIC LOADING
• EFFECTIVE GRANULAR MODULUS TO MODEL PAVEMENT RESPONSES
• EVALUATION OF IN SITU ELASTIC MODULI FROM ROAD-RATER DEFLECTION BASIN (ABRIDGMENT)
• FABRIC USE IN LOW-DEFORMATION TRANSPORTATION SUPPORT SYSTEMS
• INSTRUMENTATION FOR THE NOTTINGHAM PAVEMENT TEST FACILITY
• LOAD EQUIVALENCY FACTORS OF TRIAXLE LOADING FOR FLEXIBLE PAVEMENTS
• NEW INTERPRETATION OF PLATE-BEARING TESTS
• NOTTINGHAM PAVEMENT TEST FACILITY
• PREDICTION OF SUBGRADE MODULI FOR SOIL THAT EXHIBITS NONLINEAR BEHAVIOR
• USE OF PRESSUREMETER TEST TO PREDICT MODULUS AND STRENGTH OF PAVEMENT LAYERS