The quality effect of mixing water on the durability and strength of concrete.
Water that use in mixing and curing of Concrete must be fit to drinking.
For example sea water cause corrosion in steel reinforcement, on the other hand if water content organic matter which led to staining of concrete, alkalis causes effloresce ...etc.
Sulfate, chloride....etc.
Sea water contains a total 3.5% salinity of which 78% is NaCl ( i.e. 2.7% of total salinity), 15% is MgCl2 and MgSO4. According to ACI 318-83 the water mixing must be potable and free from salts (fit to drinking , Giving no specific reference to sea water, it specifies that mortar cubes made with computable mixing water shall 7 days and 28 days strength equal to at least 90% of strength of similar specimen made with drinking water.
Dear Prof. Doha M Al Saffar ,
Thank you so much for your interesting and valuable comments.
As mentioned in the previous comment, sea water contains a total 3.5% salinity of which
- 78% is NaCl ( i.e. 2.7% of total salinity) - 15% is MgCl2 and MgSO4
According to ACI 318-83 the mixing water should be potable and free from salts. Giving no specific reference to sea water, it specifies that mortar cubes made with computable mixing water shall 7 days and 28 days strength equal to at least 90% of strength of similar specimen made with potable water.
I completely agree with that, Water that use in mixing and curing of Concrete must be fit to drinking. For example seawater cause corrosion in steel reinforcement, on the other hand if water contains organic matter, which led to staining of cement concrete, alkalies causes efflorescence.
Water that use in mixing and curing of Concrete must be same to tap water. For example seawater cause corrosion in steel reinforcement, on the other hand if water contains organic matter, which led to staining of cement concrete, alkalies causes efflorescence.
Yes, water used for curing should be fit for drinking because drinking water will have all the salts in less quantity or nil which can affect concrete, where as sea water will have effect on concrete as well as water containing organic impurities.
If water quality is good, automatically strength of concrete and durability characteristics of concrete will definately enhance.
Regards..
Abhijeet Baikerikar
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