Epoxy Coated Rebar
Epoxy Coated Rebar
(OP)
Are there different types of epoxy coated rebars?. We are building a geothermal power plant in Nicaragua and a drawing specifies field applied fusion bonded epoxy coating on the rebar for a foundation, we will buy the rebar coated in the US since we can't find any on Central America, i just need to be sure that if i ask for epoxy coated rebar they won't reply back asking "what kind do you need?"
Thanks.
Thanks.





RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
I'm not trying to promote epoxy coated bars here. But I've noticed over the past several years that this issue isn't all that clear cut. Most of the US state bridge departments use epoxy coating in their bridge decks. Here's a few other article links. Again - I'm not cheerleading here - just curious as to how you compare the negative comments on epoxy coated bars above with articles such as these:
http://
http://www.lrrb.org/pdf/200847TS.pdf
An older paper from Australia:
paper link
An FHWA report (where they intentionally damaged the coating)
ht
http:
RE: Epoxy Coated Rebar
A German study back in the 80's showed that good, dense concrete with appropriate control on cover was more effective than either epoxy coating or galvanizing in marine applications.
RE: Epoxy Coated Rebar
Either way, if you must use it, then there are specifications for the rebar which are readily available on the internet. Look for reference to ASTM / AASHTO
fusion coating method (better)
http://www.astm.org/Standards/A934.htm
electrostatic spray method
http://www.astm.org/Standards/A775.htm
RE: Epoxy Coated Rebar
cvg, so even if the rebar is bought with the coating from the factory, they can only be coated by these two methods?.
By the way, we are using this rebar for a Rock Muffler foundation, i can only guess that the designer is specifying these rebar because it is close to the cooling towers, so they expect to have some acid water not only inside of the muffler but also outside. We are building phase 2 of the project, for phase 1, the rock muffler was specified with common rebar, no coatings. I also believe that the water is not that acid since by the time it gets to the rock muffler it has gone through several filters to remove almost all the brine. I'm not a mechanical or chemical engineer but i'm pretty sure i'm right, i'll post some pictures of the phase 1 muffler (already built) and the phase 2 rock muffler when we build it.
RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
Do you have the relative costs for epoxy coating under ASTM A934 and ASTM A775?
I expect that A775 is less costly.
Dik
RE: Epoxy Coated Rebar
I would expect the A934 coating to cost in the range of $0.70 above the steel price, but there are so few coaters doing this that it is difficult to provide a reasonable cost.
Hope this helps.
RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
Dik
RE: Epoxy Coated Rebar
shipping requires special handling and storage procedures. Installation must be done without damaging the coating. Any field adjustments will require repairs. And then there is additional inspection verify coating thickness and to find and repair all the damaged areas and protect it until concrete is poured. Depending on the size of the project, this can be a major cost factor.
RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
RE: Epoxy Coated Rebar
nicaeng, what state are you in? Is this a public or private job?
RE: Epoxy Coated Rebar