DIY Aragocrete rock


has anyone done this? SUpposedly you are supposed to use portland cement, but is it best to get the ready to use kind, that has sand and gravel in it? or would that sand they put in there not be the right type and contain silicates? i dont know if you can make concrete with just the mix and not sand and gravel. i did however find carribiean play sand at home depot!


You use just the Portland cement without any sand or rocks. I use it for making frag plugs. My formula is one part cement 4 parts crushed coral (I had it left over from switching to sand) and 1/2 part aragonite sand. Cure in fresh water until pH stabilizes. Anyway it works good for plugs.