What is the permissible limit of organic matter present in water for mixing concrete as per IS 456-2000?

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  1. 400 mg/l
  2. 2000 mg/l
  3. 3000 mg/l
  4. 200 mg/l

Answer (Detailed Solution Below)

Option 4 : 200 mg/l
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Detailed Solution

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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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