I think we would need to know what you want to make to give you an answer.
Concrete curbing is an alternative to plastic or metal landscape edging made with concrete. Concrete curbing has become more popular because it can be installed in every climate.
Staining concrete is a great way to get a uniform consistent color throughout the project. Relatively cheap, it is a better alternative to painting your concrete.
pour card poor or fare
yes it is, it can be crushed and reprocess into alternative building materials
Concrete countertops have become extremely popular in the last few years. Countertops made from concrete are used in kitchens and are a cheaper alternative to installing granite countertops.
yes you can use a framed floor for a metal shed, however you may want to pour a concrete footer (stem wall) to keep the wood up off the ground, or use concrete blocks to support it. And use pressure treated wood.
They are not competing / alternative products. Hydrazzo is an interior finish. It is one of several aggegate based plasters that go on top of gunite (concrete).
It is called "Foam-crete" or "light weight concrete" either the aggregates used are light weight in themselves or additives are present, that form air spaces (bubbles) with-in the concrete itself, thus reducing the concretes mass. It must be understood that the integrity or strength of the concrete is lost or at least greatly degraded. The product is often used to in-bed the tubes used in "Radiant Heat" as placed over a wooden sub-floor.
The in-ground pools are prefabricated. The bodies are made of fiberglass-reinforced plastic. This is an alternative to vinyl-lined, gunite and poured concrete pools.
It was an alternative to stone. Instead of chiseling stones to the proper shape, the concrete was poured into a form and shaped. It was also easier to transport than stones weighing several tons. Concrete is prefab stone.
Concrete is probably the most important building material today and is used as an alternative for brick/wood since the Roman & Egyptian times. It is composed of cement,stone[gravel], sand and water which is a key ingredient that hardens the concrete. When reinforced with steel bars it is even more useful.
The best concrete for making a concrete bench is Bench concrete.