[Greenbuilding] Concrete Fertilizer Staining

[RT]

On Mon, 01 Nov 2010 17:16:52 -0400, McDonald, David Joseph  
<davidmcdonald at neo.tamu.edu> wrote:

> I am doing some experimenting with fertilizer staining

Well, my guess is that this "fertiliser" could be either ferrous sulphate  
(or ferrous nitrate) or cow or pig poo ... all of which would stain  
concrete.

And I think that with all of the above materials, it'd be best to apply to  
the concrete before it is dry (ie ASAP after finish trowelling.)

If I were doing it, I'd lay down some salvaged polyethylene sheet (taking  
some care to seal the seams)  ASAP after the above step and then put down  
some scrap sheet goods (plywood or OSB or even drywall cut-offs) to  
protect both the poly and the green concrete) and leave moisture/impact  
barrier down for at least 3 weeks (a month or more would be preferable) so  
that the cement will have access to the moisture necessary for full  
hydration over the curing period.

No scuff marks and dirt to clean up, better quality concrete (provided  
that the concrete was placed and finished properly as well.)


-- 
=== * ===
Rob Tom
Kanata, Ontario, Canada
< A r c h i L o g i c  at  Y a h o o  dot  c a >
manually winnow the chaff from my edress if you hit "reply"
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