Chloride Content in Mixing Water.

Excessive chloride ions in mixing water can contribute to accelerated reinforcing-steel corrosion and should be a concern when evaluating a mix design. Maximum water-soluble chloride ions, in various forms of concrete (as a percentage), should not exceed the following:

• Prestressed concrete 0.06%
• Reinforced concrete exposed to chloride in service (e.g., garbage slab) 0.15%
• Reinforced concrete that will be dry and/or protected from moisture infiltration 1.00%
• Other reinforced concrete 0.30%

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