Alexander Oliva Rivera

Alexander Oliva Rivera is an industrial PhD Candidate (started 2022) within the unit Materialdesign. His PhD work focuses on carbonation under accelerated- (~10% CO2) and natural conditions in recycled concrete aggregates (RCA) by investigating its chemical, physical and mechanical properties after carbonation. Alexander also has several years of experience as a RnD engineer in concrete development and testing cement based materials such as ordinary concrete, SCC, HPC, UHPC and cellular lightweight concrete (CLC). He was also previously involved in large multi-disciplinary EU projects (H-House, SESBE, LORCENIS, RE4, LIGHTCOCE). He is also currently enrolled as a PhD Candidate in the Department of Resource Recovery and Building Technology at the University of Borås. Studying following topics; - Introduction to carbonation mechanisms in binders such as OPC,GGBS & FA, - Phase assemblage and carbon uptake in binders under accelerated carbonation conditions, - Assessment of recycled concrete aggregates (RCA) derived from un-/sorted construction & demolition waste for CO2-storage potential, - Carbon uptake on RCA under different parameters such as exposed surface area, exposure time, temperature, relative humidity and carbon dioxide concentration levels, - CCU of carbonated recycled aggregate and its mechanical properties in new concrete for higher replacement ratios under relevant exposure classes.