Geopolymerization of Mine Tailings for Sustainable Development

University Of Arizona, Tucson AZ

Investigators

Abstract

The major objective of this research effort is to study the stabilization of mine tailings through geopolymerization so that they can be used as construction material in large scale and in a cost-effective way. The research will use an innovative multi-scale and multi-disciplinary approach and consist of (a) macro-scale study of the mechanical and environmental properties of mine tailings after geopolymerization; (b) investigation of the micro/nano-scale structures and interactions of mine tailings after geopolymerization; and (c) discrete element method simulations to investigate how the micro/nano-scale characteristics affect the macro-scale behavior. This project will help promote the utilization of mine tailings as construction material and reduce the disposal of mine tailings, saving the land required for the disposal impoundments and the related high monetary, environmental and ecological costs, reducing the demand for virgin materials that would need quarrying, and decreasing the use of energy-intensive ordinary Portland cement. So it will contribute to sustainable development and have major economical, environmental and societal impacts. By integrating the research results into graduate, undergraduate, and online courses, this project will broaden awareness and knowledge of civil engineering students on sustainable development, a topic increasingly emphasized in Civil Engineering. Combining the research with the on campus Summer Engineering Academy and K-12 mentoring programs will introduce K-12 students from diverse backgrounds to the field of sustainable development. This research will also broaden participation of underrepresented groups in a significant way, by recruiting and mentoring graduate and undergraduate assistants from underrepresented groups.