Strength Gain beyond 3 Days
Strength Gain beyond 3 Days
(OP)
I recently came across an unusual case while reviewing the log of break strengths. For a 5000 psi concrete, that strength was reached in less than 3 days with very little strength gain afterwards. Literature says concrete should be at about 0.7 of its long-term strength at 7 days. I realize the time to reach this can be made much shorter for high-early strength concrete. However, there should some strength gain afterwards. Does anyone have experience that can explain this situation?





RE: Strength Gain beyond 3 Days
RE: Strength Gain beyond 3 Days
A few questions for you:
1. Could you post the mix design? Batch weights per cubic yard, type of cement, W/C ratio, including admix used will suffice.
2. How were specimens cured...standard curing per C31 or steam cured?
3. Is the current strength gain behaviour typical with this particular mix? Hopefully the QC dept of the ready mix company will have back-up data.
RE: Strength Gain beyond 3 Days
RE: Strength Gain beyond 3 Days