I wonder if the coir would soak up water from the concrete mixture and cause it to break down?? At least on the surface and edges of the concrete exposed to air? Ive been using coir for almost 15 yrs in many applications and it is slow to break down, even with exposure to oxygen and moisture. I'm very curious to see how this works! Our ground in Florida settles a lot and we get cracked foundations, plus we have sinkholes. Would be nice if we could make the concrete stronger.
Thank you for your post, very nice!