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The effects of age and moisture regime on the response of briquetted acoustic gauges
Author(s) -
POTTER M. M. A.,
SWAMY R. N.
Publication year - 1976
Publication title -
strain
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.477
H-Index - 47
eISSN - 1475-1305
pISSN - 0039-2103
DOI - 10.1111/j.1475-1305.1976.tb00184.x
Subject(s) - gauge (firearms) , moisture , dependability , materials science , engineering , composite material , metallurgy , reliability engineering
In‐situ measurement of concrete strains with acoustic gauges often requires that the gauges are encapsulated or ‘briquetted’ for protection. The effects of age and moisture regime on the response of the briquetted gauge are, however, unknown. Studies extending up to 700 days on these two effects are presented and gauge response is compared to that of the unbriquetted gauge. It is shown that both age and the moisture condition of the briquetted gauge influence its response. By choosing a datum, relevant to their environment and related to some time after the peak of hydration temperature is reached, the response of the briquetted gauge can be made to be close to that of the unbriquetted gauge. Tests show that if this is done the stability and dependability of the briquetted acoustic gauge can be relied upon.