Odd Strain Gauge for Concrete?

[Martin King 2Participant @martinking2]

Hi All,

Again this came in an auction lot, some sort of strain gauge instrument for concrete.

Came with lots of small buttons and 2 boxes containing what look like reference bars.

How would one use this please?

Cheers, Martin

[peter1972Participant @peter1972]

I have seen buttons similar to those placed each side of a crack in a concrete building. I guess they are used to monitor whether the crack is slowly widening.

[DC31kParticipant @dc31k]

You can look up ‘demec studs’ in a nearby search engine. That will tell you as much as you care to know.

Start here:

How To Monitor A Crack

[David SeniorParticipant @davidsenior29320]

I think one of the reference bars is made from Invar

Dave

[Martin King 2Participant @martinking2]

Thanks very much guys, help is much appreciated. Martin

[V8EngParticipant @v8eng]

I believe Mayes are still active and in the same place.

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