Cement is the main component of concrete. It is very important in the construction industry. Despite this product, cement releases carbon dioxide. That's why iron ore is used instead of cement. Ferrock is an iron-based composite that is carbon neutral to cement and can be used to produce a variety of household products from various wastewaters. Ferrock is a binder made from a mixture of iron oxide powder, fly ash, lime powder, metakaolin and oxalic acid. Oxalic acid acts as a catalyst. Iron oxide reacts with carbon dioxide and water to form iron carbonate. It can improve the environment by absorbing atmospheric carbon dioxide for the hardening process. By using iron ore, you can reduce the emission rate of the most harmful greenhouse gases. During treatment, carbon dioxide is used instead of antibiotics. This helps reduce water consumption.