Upcycling of demolition material from concrete and brick for the production of cold-bound, alkali-activated lightweight aggregates

Author:

Wichmann Isabelle,Firdous Rafia,Stephan DietmarORCID

Abstract

AbstractThis paper deals with the production of artificial aggregates based on the recycled fine fraction (≤ 4 mm) from construction demolition waste. Concrete powder, brick powder and their combination were used to produce aggregates through pelletisation using sodium silicate solution as an activator. For all aggregates, efficiency, bulk crushing resistance, particle density, water absorption and loose bulk density were evaluated. The bulk crushing resistance was evaluated for samples cured with different methods. A higher proportion of concrete powder increased the strength and density. The aggregates were successfully formed with bulk crushing resistance and particle densities in the range of lightweight aggregates. Graphical abstract

Funder

Bundesministerium für Bildung und Forschung

Technische Universität Berlin

Publisher

Springer Science and Business Media LLC

Subject

Mechanics of Materials,General Materials Science,Building and Construction,Civil and Structural Engineering

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