Properties of Urea-Doped Ice in the CRREL Test Basin

In the course of model tests with urea-doped ice in the CRREL Ice Engineering Facility test basin, the growth process and the physical and mechanical properties of the model ice were investigated. The parameters which were varied were: urea concentration in the tank water, air temperature during gro...

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Bibliographic Details
Main Author: Hirayama,Ken-ichi
Other Authors: COLD REGIONS RESEARCH AND ENGINEERING LAB HANOVER NH
Format: Text
Language:English
Published: 1983
Subjects:
Organic Chemistry
Snow
Ice and Permafrost
Test Facilities
Equipment and Methods
Mechanics
*STRUCTURAL PROPERTIES
*ICE
*MODEL TESTS
*DOPING
*UREA
TEMPERATURE
THICKNESS
MECHANICAL PROPERTIES
PHYSICAL PROPERTIES
ICE FORMATION
CHEMICAL COMPOSITION
FLEXURAL STRENGTH
DATA ACQUISITION
ARMY RESEARCH LABORATORIES
MODEL BASINS
CRREL(Cold Regions Research and Engineering Laboratory)
LPN-CWIS- 31355
Cold Regions Research and Engineering Laboratory
Ice
permafrost
Online Access:http://www.dtic.mil/docs/citations/ADA128219
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA128219
Description
Summary:In the course of model tests with urea-doped ice in the CRREL Ice Engineering Facility test basin, the growth process and the physical and mechanical properties of the model ice were investigated. The parameters which were varied were: urea concentration in the tank water, air temperature during growth, growth duration, and tempering time. Uniformity of ice thickness and ice mechanical properties over the whole tank area were found to be satisfactory. The structure of the urea-doped ice was found to be similar to that of the ice except for a relatively thick incubation layer over a dendritic bottom layer. Empirical relationships were established between: ice thickness and negative degree-hours; mechanical properties and growth temperature, urea concentration, and ice thickness; and reduction in mechanical properties and tempting time. The results of the study are presented in charts which permit reliable scheduling of model tests with required ice thickness and ice flexural strength. (Author)

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