hey guys i hv made a project made on manufacturing of cement. i was just wondering is it possible to extract cement back for concrete?
No, wetting, setting and curing is a one way process.
No, it can't. Adding water to portland cement initiates a complex series of reactions that irreversibly changes the nature of the dry ingredients. If you remove the water at some point by drying or firing the concrete, it will not give back the original cement dry ingredients. Just to be clear, concrete is cement added to an aggregate. The aggregate is often crushed stone or gravel, but it can be other substances. The stone normally does not chemically react with the cement, so I suppose you could crush the concrete to physically separate the cement from the rocks. But then you would have cement chunks that cannot be poured like new cement and are weakened by the crushing, not very useful.
