A NEW TYPE PENETROMETER FOR MEASURING CERTAIN SOIL PROPERTIES

reportActive / Technical Report | Accession Number: AD0012288 | Open PDF

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.

Author(s):
Powers, M. C.
Author Organization(s):
JOHNS HOPKINS UNIV BALTIMORE MD CHESAPEAKE BAY INST
Descriptive Note:
Special rept. no. 2
Pagination:
0033

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
R52-24
Contract/Grant Number(s):
NONR-248(07), NONR-248(30)
Project Number(s):
NR-084-005, NR-083-070
Monitor Series:
ONR
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control; JCA_5.2_Understand; JCA_5.2.3_Share Knowledge and Situational Awareness; JCA_1_Force Support; JCA_3.2_Engagement; JCA_3_Force Application; JCA_1.2_Force Preparation; JCA_3.2.1_Kinetic Means; JCA_1.2.3_Educating; JCA_1.2.7_Experimentation; JCA_5.3_Planning; JCA_6.4.1_Secure Information Exchange
Communities of Interest:
Ground and Sea Platforms
Descriptor(s):
*PENETROMETERS, *OCEAN BOTTOM SOILS, PHYSICAL PROPERTIES, RESISTANCE, GRAVEL, SAND, DEPTH, PENETRATION, CLAY, PLASTIC PROPERTIES, FRICTION, CONICAL BODIES, SEDIMENTS, UNDERWATER, COHESION, LABORATORY TESTS, CHEMICAL PROPERTIES
Field(s)/Group(s):
Soil Mechanics, Physical and Dynamic Oceanography
Report Date:
1952 Nov 01