Processing of construction and demolition waste from concrete

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Abstract

There is a need to develop appropriate techniques and technologies that will upcycle construction and demolition waste as a secondary material. This study aims at improving construction and demolition waste from concrete. Three (3) fractions of materials were processed, jaw crusher and impact crusher were employed.  Based on this study, the concrete construction and demolition waste fraction with raw material sizes between 45 to 80 mm, and 22 to 45 mm, could be explored for size range 4 mm to 25 mm (4/25) aggregates production, while the raw sizes 0 to 22 mm, could be investigated for 4 mm to 14 (4/14) aggregates after crushing and some selective sizing. Flakiness indexes were < 7% for the 2 larger size fractions. Further studies are recommended, on other properties.