Dad2one
Structural
- Jul 2, 2009
- 15
Hello.
We had to over-excavate for retaining wall footings in Atlanta while chasing competent bearing soil. The contractor wants to use a lean concrete to fill the over-excavation and submitted a mix design that has a w/c ratio of 1.06 for 1000 psi.
Info I've found about lean concrete just says that it is characterized by 'high' w/c ratios. 1.06 seems well beyond 'high' to me.
What do you think?
Thanks.
We had to over-excavate for retaining wall footings in Atlanta while chasing competent bearing soil. The contractor wants to use a lean concrete to fill the over-excavation and submitted a mix design that has a w/c ratio of 1.06 for 1000 psi.
Info I've found about lean concrete just says that it is characterized by 'high' w/c ratios. 1.06 seems well beyond 'high' to me.
What do you think?
Thanks.