ASTM recommends a "circumferential measuring tape" to determine the actual diameter of a triax specimen. Has anyone used this or know exactly what it is? Or where to get one?
Yep - I use one. It's also called a Pi tape - materials labs use them to measure concrete cylinders. They're a hell of a lot better than using calipers, even the digital ones -
Try Humboldt, SoilTest, Durham Geo. Or your local equipment rep.
Please see FAQ731-376 by [blue]VPL[/blue] for tips on how to make the best use of Eng-Tips Fora.