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-   -   quikrete and davis color (http://www.diychatroom.com/f105/quikrete-davis-color-174258/)

hwidney 03-12-2013 09:02 AM

quikrete and davis color
 
We are coloring some quikrete, 4000 psi. Using Davis color who recommends a certain ratio of color to cement (based on 94 lbs cement). To apply to quikrete, I have to know how much cement is in quikrete 4000 psi concrete. Not published info. Does anyone know or think they know or offer a good guess? Much appreciated.

Tscarborough 03-12-2013 10:59 AM

An 80# bag is .66 cuft, so 28/.66=42.42 bags of concrete mix per yard. A 4000 psi mix design would be 6-1/2 sacks of portland per yard. What is the color loading?

hwidney 03-12-2013 11:37 AM

loading
 
Thanks. Davis specs for Sandstone color are .75 pounds per 94 pounds of cement. So, I am trying to determine loading (amount of sandstone color) per 60 pound bag of quikrete 4000 psi? thanks.

stadry 03-12-2013 11:45 AM

whatever amt of color you use, when trying to match existing color, always start lighter,,, you can always add more pigment but trying to get pigment OUT of a mix is impossible,,, remember colored sealers often save your ***,,, we always have the client approve color because every set of eyes is different - even on the side of 1 nose ea eye ' sees' a different color :yes:

altho some colors are market'd as non-fading, all things fade when exposed to uv,,, it may be imperceptible ea yr but they do,,, IF its an arch/eng spec, they only want specs follow'd,,, h/o's are MUCH different,,, don't ask me how i know this - i just know :furious:

Tscarborough 03-12-2013 12:27 PM

.49 CuFt per bag then. 28/.49=57.14 bags per yard, 6.5/57.14= .11 (CuFt, which 1 CuFt = 94#s of Portland cement) per bag. So, .11x.75=.08 # of color per bag. Figure your batch size as 3-60# bags at a time and you get 1/4# color per batch.


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