Neville Centre of Excellence in Cement and Concrete Engineering
Autumn 2021 webinar series
Series theme: Achieving low carbon infrastructure
Organised by the Neville Centre of Excellence in Cement and Concrete Engineering in collaboration with the UKCRIC National Centre for Infrastructure Materials and the Materials and Structures Research Group of the School of Civil Engineering, University of Leeds.
Webinar title: Technical barriers for an increased recycling rate of waste concrete
Abstract: Concrete is the most widely used structural material, and its demand is depleting natural gravel and sand. Concrete recycling rates have increased dramatically over the past decade, with a focus on recycling the coarse fraction. However, there is still a long way to go. When old concrete is crushed, a significant amount of recycled fines is produced. This fraction is more difficult to recycle and is generally still used in downcycling applications such as landfills and other geotechnical applications. Alternative uses for the fine fraction include applications as fine recycled aggregate, supplementary cementitious materials, fillers, and feedstocks for clinker production. These technologies still face challenges in terms of their acceptance and eco-efficiency. Limited knowledge and operational barriers have also prevented the implementation of processing technologies for the full recycling of concrete waste that includes the fine fractions. This presentation will discuss the challenges and opportunities for full recycling of all size fractions of concrete waste. Finally, some facilitation and research strategies needed to make progress towards full recycling of waste concrete will be proposed.
Bio: Dr. Yury Villagrán Zaccardi is a MSCA-Seal-of-Excellence researcher of the Research Foundation-Flanders, and works at the Magnel-Vandepitte Laboratory of Structural Engineering and Building Materials, Ghent University, Belgium. He obtained his degree as a Civil Engineer from the National University of Technology (Argentina). After completing his PhD at the National University of La Plata (Argentina), he worked at LEMIT (Argentina), as a postdoctoral fellow of the National Council of Technological and Scientific Research of Argentina (CONICET), and later at Ghent University, also as a postdoctoral researcher. In addition, he has made scientific visits to the Eduardo Torroja Institute of Construction Sciences in Spain. Other postgraduate studies include a CEMCO Master in Innovation in Construction, IETcc, Spain, and a Postgraduate Master in Concrete Technology and Construction, UNCPBA, Argentina. He later became Associate Professor of the National Technological University of Argentina. Since 2014, he has been Secretary of the Latin American Group of RILEM, and actively participates in several Technical Committees of this organization, mainly related to the improvement of eco-efficiency and durability of cementitious materials. He is also a member of the Board of Directors of the Argentine Association of Concrete Technology. His academic production includes several publications on concrete durability (e.g. corrosion, transport properties, sulfate attack), and concrete sustainability (e.g. low carbon binders, recycled aggregates, retrofitting of structures).