STUDY OF CHERT POPOUTS, WOLF RIVER FLOODWALL, MEMPHIS, TENNESSEE; INITIAL OBSERVATIONS.

The need for a program of systematic observations on the formation and development of chert popouts on concrete surfaces has long been recognized. After preliminary inspections, a group of eight monoliths in the floodwall along the Wolf River, Memphis, Tenn., was selected in 1959 for continuing stud...

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Bibliographic Details
Main Author: Buck,Alan D.
Other Authors: ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
Format: Text
Language:English
Published: 1961
Subjects:
Hydrology
Limnology and Potamology
Structural Engineering and Building Technology
(*FLOODS
CONTROL)
(*CONCRETE
*WALLS)
SURFACES
RIVERS
EXPOSURE(PHYSIOLOGY)
TEMPERATURE
FREEZING
CONSTRUCTION
PERMAFROST
FAILURE(MECHANICS)
TENNESSEE
WOLF RIVER
permafrost
Online Access:http://www.dtic.mil/docs/citations/AD0694378
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0694378
Description
Summary:The need for a program of systematic observations on the formation and development of chert popouts on concrete surfaces has long been recognized. After preliminary inspections, a group of eight monoliths in the floodwall along the Wolf River, Memphis, Tenn., was selected in 1959 for continuing study. The investigation includes periodic field inspections and laboratory work to provide additional data and to correlate the results. The data obtained thus far on the surfaces under study suggest that: (a) popouts associated with chert particles do not form on these exposed concrete surfaces in the absence of freezing temperatures; (b) elapsed time between completion of construction and exposure of these concrete surfaces to freezing did not appear to influence rate of development of chert popouts; (c) chert popouts may become enlarged by frost action through the failure of an additional volume of the porous chert particle which caused the popout or by the failure of other exposed by the first popout. (Author)

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