Concrete is an essential building material around the world but is often associated with a hefty carbon footprint, so this cement-free concrete has been researched to help offer a more eco-friendly alternative. The concrete was created by scientists at the University of Tokyo and features a cement-free recipe that instead bonds sand particles together with a reaction between alcohol and a catalyst. This would help to greatly reduce the requirement for cement without the need for specialty components for a more sustainable approach to the essential building material.
Lead author of the study Yuya Sakai spoke on the cement-free concrete saying, "Researchers can produce tetraalkoxysilane from sand through a reaction with alcohol and a catalyst by removing water, which is a byproduct of the reaction. Our idea was to leave the water to shift the reaction back and forth from sand to tetraalkoxysilane, to bond the sand particles with each other.”
Image Credit: University of Tokyo