timothyd
Structural
- Mar 18, 2011
- 9
I have come across an identical condition as described in the reference thread507-283289 regarding alkali–silica reaction (ASR) in a residential foundation in Connecticut. Core samples were taken and a petrography test was performed to rule out the presence of pyrrhotite, which has been a problem in CT but this property is outside the radius of that problem. The test identified ASR as the problem. The dwelling is quite large and was for sale for over $5 mil. The basement is partially finished with a gym and art studio. The dwelling has been taken off the market to resolve this matter.
My recommendation to the owner is to replace the foundation in its entirety. I have not found another solution that is less drastic. The only other possible alternative is to construct a new foundation inside the old and transfer the loads into the new one, and there would have to be a waterproofing barrier between the two. The dwelling has many concentrated point load with steel framing that would need to be transferred due to an open floor plan above.
I am curious to know if there has been a successful insitu treatment out there. If so, I have not found it yet.
Many thanks.
My recommendation to the owner is to replace the foundation in its entirety. I have not found another solution that is less drastic. The only other possible alternative is to construct a new foundation inside the old and transfer the loads into the new one, and there would have to be a waterproofing barrier between the two. The dwelling has many concentrated point load with steel framing that would need to be transferred due to an open floor plan above.
I am curious to know if there has been a successful insitu treatment out there. If so, I have not found it yet.
Many thanks.
