00621482

Component

http://onlinepubs.trb.org...trr/1991/1317/1317-015.pdf

https://scholar.google.co...gair&publication_year=1991

The diametral resilient modulus test is a procedure by which the resilient or elastic modulus of asphalt mixes can be determined. The resilient modulus is used as a fundamental input parameter in the layer theory for flexible pavements design. In the 1986 "AASHTO Guide for Design of Pavement Structures", the basis for materials characterization is the elastic or resilient modulus. The diametral resilient modulus test uses the repeated-load indirect tensile strength. ASTM D4123-82 recommends that the resilient modulus (M sub r) be measured by applying stresses with magnitudes in the range of 10 to 50% of the indirect tensile strength of the specimens. It has been observed that the measured M sub r value depends on the percentage of indirect tensile strength used. For example, the value of M sub r obtained by testing at a load of 10% indirect tensile strength will be different than that obtained by testing at a load of 30% indirect tensile strength. A comprehensive test program investigated the previous observation. To ensure that the difference between the M sub r values measured under various loadings is not statistical, several identical specimens were cast and the M sub r value for a particular loading was found by averaging the results. Also, three different asphalt contents were used to see if the change in M sub r is affected by the percentage of asphalt in the mix. The results indicate that the M sub r value measured using ASTM D4123-82 depends on the percentage of indirect tensile strength used as the load for testing. Also, the difference in the M sub r value was found to be less for mixes with higher asphalt contents.

This paper appears in Transportation Research Record No. 1317, Asphalt Mixtures: Design, Testing, and Evaluation 1991. 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

01407169

p. 139-144

1991

Transportation Research Record

030905155X

Figures (4) ; References (9) ; Tables (5)

Accelerated tests; Asphalt concrete; Asphalt content; Modulus of resilience; Repeated loads; Tensile strength; Tension tests

Indirect tensile test

Highways; Materials; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Apr 30 1992 12:00AM

• ANALYSIS OF CRACK PROPAGATION IN ASPHALT CONCRETE USING COHESIVE CRACK MODEL
• DEVELOPMENT OF A PRACTICAL METHOD FOR DESIGN OF HOT-MIX ASPHALT
• EFFECT OF AGGREGATE GRADATION VARIATION ON ASPHALT CONCRETE MIX PROPERTIES
• EFFECT OF TEMPERATURE AND MIXTURE VARIABLES ON FATIGUE LIFE PREDICTED BY DIAMETRAL FATIGUE TESTING
• EFFECT OF THE USE OF MODIFIERS ON PERFORMANCE OF ASPHALTIC PAVEMENTS
• EFFECTS OF SAMPLE PREPARATION AND AIR-VOID MEASUREMENT ON ASPHALT CONCRETE PROPERTIES
• EVALUATION OF MARSHALL AND HVEEM MIX DESIGN PROCEDURES FOR LOCAL USE
• EVALUATION OF MIX PROPERTIES OF COLD IN-PLACE RECYCLED MIXES
• EVALUATION OF RESIN-MODIFIED PAVING PROCESS
• INVESTIGATION OF RUTTING POTENTIAL USING STATIC CREEP TESTING ON POLYMER-MODIFIED ASPHALT CONCRETE MIXTURES
• MATERIAL CHARACTERIZATION AND INHERENT VARIATION ANALYSIS OF ASPHALTIC FIELD CORES
• METHODS TO DETERMINE POLYMER CONTENT OF MODIFIED ASPHALT
• NEW TECHNIQUE TO MEASURE MOISTURE IN HOT-MIX ASPHALT CONCRETE NONDESTRUCTIVELY
• PERFORMANCE ASSESSMENT OF BINDER-RICH POLYETHYLENE-MODIFIED ASPHALT CONCRETE MIXTURES (NOVOPHALT)