Water Specification for concrete structure according to ACI 318

Almost any natural water that is drinkable (potable water) can be use as water for concrete mixing. Its water must free from injurious amount of oil, acid, alkali, salt, organic materials and chloride ion as shown in table 4.3.1.

Those impurities could be effect to concrete setting time, strength, stability of volume and corrosion on to reinforcement. Be ware the salts and other impurities from aggregates in to concrete mixing.

Non potable water - re use water such as toilet and wash washing and irrigation may be use as concrete mixing as long as follow condition below:

  • water used in concrete proportion (mixing) comes from same source or we can say non potable water is used as concrete mixing.
  • mortar test cubes made from non potable water could reach compressive strength test in 7 days and 28 days at least 90% from potable water can be use as concrete proportion

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