For a science projekt i need to use a material that is stronger than plaster but not to heavy like cement or if u know a brand of plaster that is really strong or vice versa with cement please tell me. it would be great If the cost is less than 50 dollars for 10kg than
Aerate the cement and it should hold most of its structural integrity as well as reduce the overall mass.
I'd consider a composite. Assume your using a low cost epoxy (like Bondo) as your binding agent. Then, find fillers to give the low cost and low density, and stiffness you want. It's an old cliche' but fiberglass is great stuff. Light, stiff, and very resilient. Apply it in layers that are saturated in epoxy, and it's hard to beat for shell structures. For solid structures, various sizes of clean, pea gravel with a luscious coating of epoxy is great stuff, but it's a bit dense... Hmm, now this is REALLY weird, but what the heck. Buy a few bags of High density polyethylene balls (1/4). Slosh them about good, in small amount of your epoxy - just enough to get them wet. Before the epoxy can set, pour the balls into your mold and then allow it to harden. Afterwords, add the remaining epoxy (they're now glued, so they won't slosh and float). Some folks add in smaller diameter balls as well, but I think that complicates things overly much. Good luck!
There is a product that is just called lightweight cement. It is used in fabrication of heavy duct work for extreme heat conditions such as power plants and such. You can also buy this product at most hardware or lumber yards. If you need to have it stronger, you can either add more portland to the mix or add stainless needles. The needles (or other types of additives) help to resist wear and give better strength to the cement with out adding much weight.
I don't know what you are trying to make, but consider using either an epoxy or even fiberglass.
you can put in the web cement plaster...yoy will get lots of information cement adhesive and cost plaster of paris araldite some people mix gum with cement u can ask in web ligher adhesive used with cement then ask for the price
