what are cement,sand and stone quantities in a concrete mix of 1:2:4
I would say, 1 sand, 2 stone, and 4 concrete. Its much easier to get a ready mix like Quickcrete.
I understand wanting to stretch your materials, but speaking from experience, don't do it. Concrete and mortar set at different rates, paper throws off the whole chemical thing that causes cement to set and you couldn't add enough metal scraps to stretch it out enough to make a difference. I tried the concrete/mortar thing and the stones soon fell apart. They were very, very weak. It's not worth it. You'll end up wasting your time and materials.
1 part cement 2 parts sand 4 gravel, thats your mix.
normal mix is as simple as 1-2-3 1 part cement 2 parts sand 3 parts aggregate, [stone] to make it stronger add 1 more part cement
Frank is correct - more or less. Concrete varies according to its use. The mix you quote is a standard mix used for structural work in housing. It is 1 part by volume of dry Portland cement, 1 part by volume of dry soft sand, 4 parts of aggregate (broken hardcore, gravel, quarry scalpings, shingle, road metal, broken stone or other special material) correctly graded. Mix dry and add water to make a mix which will stay in soft shapes - not runny and not stiff. It should settle into place without the liquid coming to the top. Use immediately. There are all sorts of additives for rapid hardening, waterproofing and so on.
