A NEW TYPE PENETROMETER FOR MEASURING CERTAIN SOIL PROPERTIES

Abstract

The rigidense instrument was designed to measure the physical and chemical properties of underwater sediments in relations to the sinking of mines. The instrument measures the depth of penetration of an 11-cm-long, 2-cm- diam Pb a weight to which is attached a 37 deg Al cone. The rigidense measure was controlled by the smallest grade size having a weight 50% or more of the largest grade size in the sample. Only Ca-saturated clays were used in the laboratory tests. The success of sinking a mine into underwater surface sediments depends on frictional resistance in clean sand or gravel, and on cohesive resistance in clay. The rigidense instrument measures the cohesive and frictional properties of unconsolidated sediments and aids in studying their plastic properties.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1952
Accession Number
AD0012288

Entities

People

  • M. C. Powers

Organizations

  • Johns Hopkins University

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Bays
  • Biological Sciences
  • Chesapeake Bay
  • Geography
  • Grain Size
  • Materials
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Navy
  • Particles
  • Penetrometers
  • Phyllosilicates
  • Physical Properties
  • Plastic Properties
  • Security
  • Soils

Readers

  • Acoustical Oceanography.
  • Pavement Materials Engineering.
  • Thermal Physics or Thermal Science.