We are casting concrete cylinders of 100mm diameter with 200mm length and 150mm diameter with 300mm length. To check the strain we will be using peizo-electric strain gauge. What is the relationship between actual length of the specimen and gauge length?
Janarthanan Rameshkumar
Hi @Sachin K C
In general, measuring grid lengths of 3 or 6 mm (0.118 or 0.236 inches) represent a good solution.
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Ishwar Sonar
The size of aggregate is one factor in case of concrete for deciding gauge length of strain gauge.
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Wit Derkowski
1) The maximum gauge length should be within the measuring base (say, in the middle 1/3 of the sample).
2) The minimum gauge length shall be at least 3 x the aggregate diameter (e.g. for aggregates up to 8 mm - sensor base: min 24 mm).
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