water on concrete absorption rate [Archive] - Ceramic Tile Advice Forums - John Bridge Ceramic Tile

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DIYourselfer
01-06-2009, 06:16 PM
How does the test work where you pour water on concrete to check the absorption rate? What are you testing for and what are you looking for?

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Davestone
01-06-2009, 06:20 PM
http://www.flooringtests.com/moisture-alkali/testing/ i can't type all that.:D

HotinOKC
01-06-2009, 06:20 PM
Does the water bead up when it's sitting there, or does it look damp?

If it beads up, it's sealed...or what Dave just posted while I was typing this....

Crestone Tile
01-06-2009, 06:22 PM
Hi Steve,

You're testing the absorptive quality of the concrete. You want the slab to exhibit the water being drawn in and drying up. If water just sits there puddled / beading and not going anywhere, it's a sign of surface contamination (intended or unintended).

You also want to make sure there is not too much water coming to the surface. An inexpensive way to do so is to put a few pieces of poly (2 ft. by 2 ft. or s0) in different areas and tape them down. Check them in a few days to see if there's moisture content.

DIYourselfer
01-06-2009, 07:26 PM
If you pour water on the concrete how long should it take before the water is absorbed? 5 minutes? An hour?

Thanks,

Davestone
01-06-2009, 09:30 PM
What are you testing for?To see if there is a sealer or if there is inherint water content?Concrete may not seem to absorb any water very quickly but it will turn dark,same as stones.The water depending on your climate may just be evaporating as fast as it is absorbed.You can do the plastic and tape test as suggested to check for inherint moisture before a wood floor.

ceramictec
01-06-2009, 09:43 PM
If you pour water on the concrete how long should it take before the water is absorbed? 5 minutes? An hour?you need to "sprinkle" water on it and it should absorb in minutes.

pouring water on it will only flood your room. :D