huangyhg

concrete code
our company is checking a roof design and tank design. the tank stores a liquid at 250 degrees fahrenheit. is there a aci code for design. can concrete be used in this scenario?
what type of liquid is in the tank? different groups provide code input based on applicability to their interests. for instance, if it holds potable water, the awwa has input. if petroleum, then api has codes and standards.
does the tank have an interior coating? if so, what is it?
ron:
excellent points.
the molten liquid is sulfur. the tank does not have any coating.
i don't think direct contact of any chemical to concrete, or steel is advisable. investigate suitable liners, also should be capable of handling high temp.
concrete cracks. without an interior lining of some sort, the liquid will peneterate the concrete matrix. i would also seal the concrete from the outside to prevent water intrusion.
as a thought here, what elements does sulfur have an affinity for other than oxygen? is there anything in the concrete matrix that sulfur likes to put it a different way/
mike mccann
mmc engineering
when sulfur mixes with water vapor, it creates either sulfurous acid or sulfuric acid, both of which are detrimental to concrete and rebar.
coat the inside.
not sure which code, other than building code would apply to this one.
there you go... seal the sucker.
mike mccann
mmc engineering
the op asked about aci codes.
aci 350 "code requirements for environmental engineering concrete structures" section 4.3 "sulfate exposures"
aci 350.2r "concrete structures for containment of hazardous materials" chapter 5 "liners and coatings"
aci 350.3 "seismic design of liquid containing conrete structures"
aci 350.4 "design considerations for environmental engineering concrete structures" section 4.2 "expansion and contaction conditions"
even with the seal i would look at specifying sulphate resistant cement.
csd72...good point.

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