Odd Strain Gauge for Concrete?

Odd Strain Gauge for Concrete?

This topic has 5 replies, 5 voices, and was last updated 9 August 2025 at 20:09 by V8Eng.

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9 August 2025 at 11:17 #811540
Martin King 2
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@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
Advert

9 August 2025 at 11:37 #811548
peter1972
Participant
@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.
9 August 2025 at 12:30 #811557
DC31k
Participant
@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
9 August 2025 at 15:57 #811579
David Senior
Participant
@davidsenior29320
I think one of the reference bars is made from Invar

Dave
9 August 2025 at 16:46 #811585
Martin King 2
Participant
@martinking2
Thanks very much guys, help is much appreciated. Martin
9 August 2025 at 20:09 #811615
V8Eng
Participant
@v8eng
I believe Mayes are still active and in the same place.
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