Anyone know concrete mix design?

[pinkpanda3310]

Sorry I've been too lazy to read up on the rules. Soo what can you have as aggregate? The beads you were going to use is made of what? plastic? I know it said no epoxies but that was for the binding mix. To save a bit of weight how about pouring some epoxy into a thin sheet (3-5mm) then when it sets crush it into the size aggregate you want.

What are the chemical addmixtures you can use? I would be exploring that.