Berniedog
Structural
- Dec 19, 2005
- 200
A year ago a fabricator installed steel railing in a concrete parapet but the installer had standing water in the core holes that he did not remove. Consequently, the "Por-Rock" expanded and blew out the side of the concrete parapet.
I am specifying a fix and they want to use concrete, not epoxy. This is what I am proposing- 1. Cut the limit of the spalling a minimum of 2" deep. 2. Add some 1/4" exp. anchors with #3 rebar tied between them. 3. Concrete to be 4000 psi, w/cm < 0.45. Aggregate no larger than 1", air of 4.5%.
Am I missing anything?
I am specifying a fix and they want to use concrete, not epoxy. This is what I am proposing- 1. Cut the limit of the spalling a minimum of 2" deep. 2. Add some 1/4" exp. anchors with #3 rebar tied between them. 3. Concrete to be 4000 psi, w/cm < 0.45. Aggregate no larger than 1", air of 4.5%.
Am I missing anything?
