Is there any guideline, or standard which indicates limiting values of water absorption & sorptivity in concrete, which can be used to grade concrete as good, average or poor quality in terms of durability?
Thanks
Dear Hammad Salahuddin,
Please refer a new durability indicator for classifying cover concrete quality as the following link.
Hopefully that it can somehow meet your requests.
Article Durability index for quality classification of cover concret...
Best regards,
Dear
It depends on the type of concrete and its specific function required. The absorption limitations are variable for building, water tank, porous pavement.
The amount of water required for concrete depends on the largest sand size, the properties of the materials used and the specific strength of the concrete.
Extremely good concrete might be 4 or 5% by mass.
Very good concrete might be 5 or 6%
Typical commercial concrete might be 6 or 7%
Pretty “ordinary” concrete might be 7 to 10%.
If you want to control water absorption, you need to control how much water goes in.
Use of GGBSF or silica fume etc can get this down somewhat, although to achieve best results in the field, concrete containing these materials requires better quality curing, though if you were serious about it, you would be pretty upset if you only got “Pretty ordinary” concrete for your efforts.
@kishan Zalariya
Can you please tell the reference or standard of these limiting values?
Concrete absorption rate depends on E / C ratio. For E / C ratio less than 0.5, the average water absorption value of the concrete is between 5.5% and 6.5%.
Dear Hammad Salahuddin,
Please refer a new durability indicator for classifying cover concrete quality as the following link.
Hopefully that it can somehow meet your requests.
Article Durability index for quality classification of cover concret...
Best regards,
ASTM C1585 - 13
Standard Test Method for Measurement of Rate of Absorption of Water by Hydraulic-Cement Concretes
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