According to IS: 456-2000, the maximum permissible limit of chlorides (as CI) present in the water that is used for mixing concrete with embedded steel is:

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DDA JE Civil 29 Mar 2023 Shift 2 Official Paper
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  1. 500 mg/l
  2. 2000 mg/l
  3. 200 mg/l
  4. 3000 mg/l

Answer (Detailed Solution Below)

Option 1 : 500 mg/l
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Explanation

As per clause 5.4 of IS 456 : 2000

Potable water is considered satisfactory for mixing Concrete and the permissible limits for solids is shown in table below:

Type of solid

Max. Permissible limit

Organic

200 mg/l

Inorganic

3000 mg/l

Sulphates

400 mg/l

Chlorides

2000 mg/l (concrete)

Chlorides

500 mg/l (RCC)

Suspended matter

2000 mg/l

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