JKStruct
Structural
- Jan 3, 2007
- 97
Disclaimer: I tried to post this in the concrete general forum, but I received no response. I haven't checked the Alexa ratings, but I'm assuming more people peruse the "other topics" forum. so here goes...
I'm working on an unbonded PT parking garage in chicaco. Our concrete spec calls for a microsilica admixture for corrosion protection. The contractor submitted an RFI asking if a Grace DCI corrosion inhibiting admixture would be an acceptable subsitute, on the basis that the microsilica mix requires a longer curing time. I have read some information on both systems, and it appears this might be acceptable. In your professional opinions, might this be acceptable? Are there any adverse repercussions that I am not considering? As a follow up question, from my understanding, the horizontal elements are more critical for corrosion protection of the reinforcement. Is it possible that the vertical elements (columns and shear walls) be poured with a separate mix devoid of this admixture? Or is that not general practice? I'm relatively new to the industry, and I would appreciate the thoughts of those more experienced. Many thanks.
...And now, back to basketball.
I'm working on an unbonded PT parking garage in chicaco. Our concrete spec calls for a microsilica admixture for corrosion protection. The contractor submitted an RFI asking if a Grace DCI corrosion inhibiting admixture would be an acceptable subsitute, on the basis that the microsilica mix requires a longer curing time. I have read some information on both systems, and it appears this might be acceptable. In your professional opinions, might this be acceptable? Are there any adverse repercussions that I am not considering? As a follow up question, from my understanding, the horizontal elements are more critical for corrosion protection of the reinforcement. Is it possible that the vertical elements (columns and shear walls) be poured with a separate mix devoid of this admixture? Or is that not general practice? I'm relatively new to the industry, and I would appreciate the thoughts of those more experienced. Many thanks.
...And now, back to basketball.
