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Chloride content threshold for soil in contact w reinforced concrete

Chloride content threshold for soil in contact w reinforced concrete

Chloride content threshold for soil in contact w reinforced concrete

(OP)
Does any one know of a reference (ASTM or DOT possibly) that documents Cl- contents (% by weight of sample or ppm) for soils that are adjacent ot reinforced concrete elements?

I have a project where there are very high Cl- contents in the concrete adjacent to the soil (test values for Cl- % are very large compared to ACI standards) and he have tested the soil but cannot find a reference with a tolerance or threshold beyond which it is accepted to be classified as low, intermediate, high etc re corrosion to the embedded reinforcing steel.

TIA

 

RE: Chloride content threshold for soil in contact w reinforced concrete

Chlorides don't attack concrete....they do their damage by attacking the rebar.  Chlorides in the soil will only affect the reinf. concrete if allowed to migrate inward.  If you are in a dry condition, migration is not very likely and would take many years to happen.

If you are in a wet condition, migration will occur and sometimes relatively fast.  Chloride contents in the 1 to 2 lbs/cy range will likely affect the rebar.

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