Testing concrete - Recommendations for determination of strain in concrete

Testing concrete - Recommendations for determination of strain in concrete

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1   Scope

This Part of BS 1881 gives recommendations on methods and devices which can be used to determine strain in concrete. Some devices measure a property directly related to strain in the gauge (e.g. electrical resistance gauges) whereas others actually measure displacement, which can be used to determine strain using a known base length (e.g. displacement transducers). References to strain gauges in this Part include both types of device.
The use of the following devices is described:
  1. a) mechanical (including mechanical/optical);
  2. b) electrical resistance (metal and alloy elements);
  3. c) vibrating wire (acoustic);
  4. d) electrical displacement transducers.

NOTE The titles of the publications referred to in this standard are listed on the inside back cover.