Accession Number:

AD0450613

Title:

STUDIES OF AERIAL CONE PENETROMETER; FIELD TESTS IN FINE-GRAINED SOILS, 1960,

Descriptive Note:

Technical rept.,

Corporate Author:

ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS

Personal Author(s):

• Blackmon, C. A.
• Knight, S. J.
• Rone, C. L.

Report Date:

1963-08-01

Pagination or Media Count:

34.0

Abstract:

An aluminum aerial cone penetrometer, specially made for use with an air gun, was shot at 100 fps into the soil at 10 test sites encompassing four soil types and a wide range of soil conditions. Results of 73 tests revealed that, in addition to the strength of a soil, the soils type and especially its plasticity appeared to influence the depth of penetration of the aerial cone penetrometer. Curves of penetration of the aerial cone penetrometer versus three soil strength expressions cone index and rating cone index to the depth of penetration, and rating cone index in the 6- to 12-in. layer were developed for three soil groups, arranged according to arbitrarily selected ranges of low-, medium-, and high-plasticity index. It was concluded that several penetrations should be made in a given area to determine an average penetration to represent the strength of that area. It is recommended that additional tests be performed to explore more fully the usefulness and limitations of the aerial penetrometer. These tests should consider the accuracy to be expected 1 when soil type is not known, 2 when soil type including sand is known, and 3 in snow. In addition, tests should be performed to determine optimum size, shape, weight, and material for the aerial penetrometer. Author

Descriptors:

• *SOILS
• PENETRATION
• MEASURING INSTRUMENTS
• TEST METHODS
• MEASUREMENT
• MISSISSIPPI
• DEPTH FINDING
• SOIL MECHANICS
• PLASTIC PROPERTIES
• SAND
• PROJECTORS(ORDNANCE)
• INSTRUMENTATION

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE