I would say the Larsen class teaches you in a way that you can pass the test and know exactly what your talking about in the field. More real world training so to speak. A little steep on the price, but well worth it
Yes, they were 28 day breaks. And the avergae breaks so far during the project have been border line as it is. So when we broke these 28 day'ers, we didnt think much of it. Its a lean mix, so it borders on the line as "cheap". but to say that our plus or minus 20 hrs may have skewed the results...
Looks like what i can interpret, is that you can use those inserts as long as they are backed by the brass molds. Just like using a metal plate to cap blocks, so must you use a metal backing to ensure the .002 spec for planeness on the samples
We have had some breaks that have come up short on their compressive strength. Problem is, is that the GC is saying we broke those cylinder 22 hours too early. I know that the ASTM gives you +/- 20 hours, but I was wondering what the variance is for AASHTO?
