Alla Linetsky said:
There was a discussion about this on the Blueconcrete forum. Latex paint is similar to the acrylic polymers some of us use, and it can be used in concrete, although it reduces compressive strength. But at 22% the concrete will fall apart. I suspect it's 22% water replacement, which is still very high. It's done strictly for the green points.
This is the chart from the guys website;
He also substitutes glass for the gravel. That's the thing that drew my attention initially. I'd be interested to know how you would calculate that correctly. I'm assuming the weight difference per given volume would throw the glass out of proportion if you just weighed out and amount equal to the gravel.
Edit: The chart didn't seem to take, his glass accounts for 31% of the mix in his recipe.