Retaining Wall Tie Bars - Corrosion Question
Retaining Wall Tie Bars - Corrosion Question
(OP)
When reinforcing wall tie bars are broken off, do they need to be patched or sprayed with epoxy to deter path of corrosion?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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Retaining Wall Tie Bars - Corrosion Question
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RE: Retaining Wall Tie Bars - Corrosion Question
If so, then no.
RE: Retaining Wall Tie Bars - Corrosion Question
RE: Retaining Wall Tie Bars - Corrosion Question
RE: Retaining Wall Tie Bars - Corrosion Question
RE: Retaining Wall Tie Bars - Corrosion Question
See paragraph 10.2 of Cast-In-Place Architectural Concrete Practice (ACI 303R-04):
http://books.google.com/books?id=bGwcUvwq7k8C&...
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RE: Retaining Wall Tie Bars - Corrosion Question
There is no structural or durability issue that I am aware of.
RE: Retaining Wall Tie Bars - Corrosion Question
What are your thoughts regarding metal chairs for footing reinforcing?
RE: Retaining Wall Tie Bars - Corrosion Question
RE: Retaining Wall Tie Bars - Corrosion Question
RE: Retaining Wall Tie Bars - Corrosion Question
Maybe it's because form ties don't (generally) have a direct contact point with the reinforcing where a chair is guaranteed to have a contact point.
RE: Retaining Wall Tie Bars - Corrosion Question
ACI 301-10, section 2 on formwork says:
2.3.2.6 After ends or end fasteners of form ties have been
removed, repair tie holes in accordance with 5.3.7.2.
and section 5:
5.3.7.2 Repair of tie holes—Plug tie holes except where
stainless steel ties, noncorroding ties, or acceptably coated ties
are used. When portland-cement patching mortar conforming to
5.3.7.4 is used for plugging, clean and dampen tie holes before
applying the mortar. When other materials are used, apply them
in accordance with manufacturer’s recommendations.
As to the use of wire bar supports, supports should be selected as needed for the purpose and exposure expected. CRSI RB4.1 outlines the requirements (this is the updated, ANSI version of chapter 3 from the CRSI Manual Of Standard Practice.)
RE: Retaining Wall Tie Bars - Corrosion Question
Most tie systems are noncorrosive, and ferric metal ties usually cost more than their noncorrosive equivalent. A solution in search of a problem and a problem incredibly easily avoided.