andrew705
Structural
- Nov 17, 2010
- 24
Question for all you concrete chemistry experts;
I have a job where I'm overseeing construction for the EOR. They're pouring the raft slab now and I'm starting to get concrete cylinder tests. I have a specified strength of 35 MPa (about 5000 psi) and I'm surprised to see tested strengths of 45 Mpa (6500 psi) at only 7 days. I'm not sure I have a problem, but I remember from days past being cautioned against concrete that cures too quickly causing shrinkage cracks.
My question is, at what point would you worry that the mix is coming back too strong? What concerns would you have?
Thanks much. Apologies if this was covered in a previous thread. I tried to search through but I couldn't find anything.
I have a job where I'm overseeing construction for the EOR. They're pouring the raft slab now and I'm starting to get concrete cylinder tests. I have a specified strength of 35 MPa (about 5000 psi) and I'm surprised to see tested strengths of 45 Mpa (6500 psi) at only 7 days. I'm not sure I have a problem, but I remember from days past being cautioned against concrete that cures too quickly causing shrinkage cracks.
My question is, at what point would you worry that the mix is coming back too strong? What concerns would you have?
Thanks much. Apologies if this was covered in a previous thread. I tried to search through but I couldn't find anything.