[Greenbuilding] Concrete Fertilizer Staining

[Clarke Olsen]

RT is right. And don't forget cardboard for floor protection: big  
sheets are free at the right dumpster. Easy to fit, easy to recycle.
Clarke Olsen
373 route 203
Spencertown, NY 12165
USA
518-392-4640
colsen at fairpoint.net




On Nov 7, 2010, at 3:01 PM, RT wrote:

> 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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