Discarded toilets, along with other ceramic waste such as basins, stoneware and bricks can be recycled into an eco-friendly form of cement, scientists say.
The method involves grounding up the ceramic waste and mixing it with an activator solution and water. The resulting mixture is then poured into a mould, and subjected to a high-temperature hardening process.
Researchers conducted tests with items made from red clay brick waste, and found the cement was actually stronger than types that are currently in common use.
They are still evaluating the strength of cement made with other forms of ceramic waste. Currently, researchers are using sodium hydroxide or sodium silicate as the activators. Researchers from Spain’s Universitat Politecnica de Valencia and Universitat Jaume I de Castellon, Imperial College of London, and the Universidade Estadual Paulista of Sao Paulo in Brazil are looking into the possibility of using rice husk ash as an activator. If it could be used, then the result would be a cement made entirely from reclaimed waste materials, researchers said.