gte447f
Structural
- Dec 1, 2008
- 754
I have a job where PVC stay in place wall forms will be used. The forming system supplier's literature says to use a "pea gravel" 4000 psi concrete with a slump of 4-5. I indicated "pea gravel" coarse aggregate on my drawings. I have received a concrete mix design submittal that is using 89 stone from a limestone quarry. I am satisfied that the 89 gradation is appropriate for the intended usage as far as size goes, but should I request that naturally weathered, rounded gravel be used instead of crushed limestone? Natural river bed gravel is my interpretation of "pea gravel", but I am not aware of an official definition. Because of the nature of the leave in place forms, I assume the mix will need to pump well and "flow" well inside the forms because of congestion and minimal if any vibration. Will rounded pea gravel be better for this application than angular crushed stone?