First results of the Kolarctic project “DeConcrete”

First results of the Kolarctic project “DeConcrete”

Project “DeConcrete: Eco-Efficient Arctic Technologies Cooperation” financed by the Kolarctic Cross Border Cooperation Program started in autumn 2019. Since that time, the international project team under the leadership of Professor Arkadiy Aizenstadt, Head of the Department of Composite Materials and Environmental Engineering (NArFU), has accomplished important tasks.

There are various practices of concrete reuse but the amount of construction and demolition waste is rising along with the increasing building activity worldwide, including Russia, Norway and Finland. About 15-17 million tons of CDW is produced annually in Russia, of which 60% are brick and reinforced concrete debris with the growth rate being 25% and recycling covering about 5% of the total waste.

The project experts analyzed documents regulating demolition practices in Russia, Norway and Finland, consolidated data concerning limits of harmful components in crushed stone for further utilization, and prepared an extended abstract called “A comprehensive summary of available legislation and practices in demolition and CDW management in the Arctic region” for the 24th Symposium on Nordic Concrete Research & Development held on 11–14 August 2020 in Sandefjord, Norway.

Documents recently published by the European Union, namely “EU Construction & Demolition Waste Management Protocol”, “Guidelines for the Waste Audits before Demolition And Renovation Works of Buildings”, could serve as a foundation for changes in demolition activities and CDW management.

Within the project grant, NArFU purchased equipment for the amount of 7 million Rubles in order to study properties, composition and presence of harmful components of recycled concrete, and to develop new technologies of its processing. Crushing equipment (DSCH-1-2) is designed for crushing rocks of any strength, slags, some metal materials, brittle polymers, stones, marble, coal, fossilized bulk materials, caked metal (cast iron) chips, and bricks. It will be used to obtain concrete samples for further study.

Combined thermal analyzer (SDT 650) will allow to carry out research of physical and chemical transformations occurring in secondary concrete rubble, identification of individual minerals and determination of their quantitative content in concrete, research of mechanisms and speed of changes occurring in concrete.

Theoretical and experimental research results and equipment will be used in the educational process for teaching bachelors and masters.

Recommendations on the use of reinforced concrete waste with due account for environmental and economic aspects will be presented for large and medium-sized enterprises involved in the production of construction materials.

Nadezhda Baykina,
DeConcrete Project Manager

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