ON RESILIENCE CHARACTERISTICS OF SOME SOILS UNDER REPEATED LOADING

概要

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As a first step in solving the problem of preventing fatigue failures in asphalt pavements, the influence of various factors involved on resilience characteristics of a silty clay and a well-graded sand has been investigated by repeated-load triaxial compression tests. The test results for the silty clay have emphasized the necessity of a sufficiently large number of stress applications and the preparation of specimens having the same water content, dry density, and soil structure as the field soil in determining the actual resilience behavior of this pavement component, and that the resilient modulus varies considerably over the range of axial stress usually encountered in actual pavements. The variations of resilient modulus at 10,000 stress repetitions of the sand have been expressed by M_γ = kσ_3^n, in which values of k and n vary with the initial dry density, the degree of saturation, and the frequency of stress application.
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