00265113

Component

http://onlinepubs.trb.org...ubs/hrr/1963/39/39-006.pdf

This paper reports the results of laboratory studies conducted to determine which of the Piedmont soils were more resilient and the cause of this resilience. This property has, in the past, led to the wasting of much of this material in highway construction work and has often caused fatigue type failures on pavements under which it has been placed. Repeated-load triaxial tests on laboratory compacted samples were employed to determine the amount of elastic or resilient rebound for each soil. In general it was found that as the percent of the mineral mica increased the resilient rebound increased, but as the plasticity index of the soil increased the resiliency decreased. Soils from the C-horizon were more resilient than those from the B-horizon. For soils from the C-horizon the resiliency increased with increasing grain size. Stereo-optical microscope studies of samples before and after repeated triaxial tests showed that soil structure played a major role in causing the resiliency in these soils. It was conclusively shown that soils with a disperse-like structure were much more resilient than those with a flocculant-like structure. Both soil structure and resiliency were influenced greatly by molding moisture content and method of compaction. /Author/

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01410008

p. 97-111

1963

Highway Research Record

Figures (16) ; References (9) ; Tables (5)

Elasticity (Mechanics); Laboratory tests; Mica; Moisture content; Plasticity index; Resilience (Materials); Soil horizon; Soil structure; Soils; Triaxial shear tests

Geotechnology; Highways

TRIS, TRB

Feb 11 1989 12:00AM

• A REVIEW OF SOIL-POLE BEHAVIOR
• ANALYSIS OF DYNAMIC BEHAVIOR OF ROADS SUBJECT TO LONGITUDINALLY MOVING LOADS
• BEARING CAPACITY OF DEEP FOUNDATIONS IN SAND
• BEARING CAPACITY OF FLEXIBLE PAVEMENTS SUBJECT TO FROST ACTION
• DYNAMIC PHENOMENA IN LAYERED STRUCTURES
• EFFECTS OF REPEATED LOADING ON GRAVEL AND CRUSHED STONE BASE COURSE MATERIALS USED IN THE AASHO ROAD TEST
• LATERAL STABILITY OF RIGID POLES PARTIALLY EMBEDDED IN SAND
• VERTICAL STRESS UNDER CERTAIN AXISYMMETRICAL LOADINGS