There is now a reason to dig out old landfills in search for discarded toilet bowls and ceramic waste, such as, basins, stoneware and bricks.
In the past, old toilet bowls stripped of its rubber, plastics and metalic parts can be crushed and used as roadbed. But research conducted by Spain's Universitat Politècnica de València and Universitat Jaume I de Castellón, Imperial College of London, and the Universidade Estadual Paulista of Sao Paulo in Brazil have discovered a better use for the waste material.
They discovered that Sodium hydroxide or sodium silicate as an activator can be mixed to this grounded up waste material with water. The mixture is then poured into a mould and subjected to a high-temperature process.to harden it. The process make the waste material useful again as cement bricks which are tested to be stronger than types that are commonly used.
Rice husk ash is also reported to be another possible reclaimed waste materials to use in the process.
You can read full article, "Old toilets recycled into new "green" cement", at Gizmag at the following link: