A process for the production of building units from an afterhardening mixture containing cement and/or lime as binding material includes the following steps. The raw material is continuously fed and pressed by stamping into a die with CO.sub.2 gas at a pressure higher than atmospheric being passed through...http://www.google.es/patents/US5051217?utm_source=gb-gplus-sharePatente US5051217 - Process for the production of building units from afterhardening materials
Process for the production of building units from afterhardening materials
