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Journal of Materials Engineering and Applications

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The high quality recycled concrete secondary materials

Author(s): Katarzyna Kalinowska-Wichrowska

Recycling is currently one of the main ways of managing concrete debris. The huge consumption of concrete in the world and the fact that its production consumes huge amounts of non-renewable resources induce a responsible approach in searching for methods and possibilities of its effective recycling.The mechanical methods of recycling concrete debris that are most commonly used on an industrial scale rely on its single or even multiple crushing. They are focused mainly on obtaining secondary aggregate. This is mainly due to the high absorbability of these aggregates, caused by the presence in their composition of a porous cement mortar, which adversely affects both the characteristics of the aggregate itself and the concrete. The purpose of other known methods is to remove cement mortar from the surface of recycled aggregate grains by: mechanical abrasion in screw mills or eccentrically rotating cylinders, by introducing additional heating of debris or gravitational classification of aggregates due to their density. Emerging advanced recycling methods are mainly based on improving the properties of secondary coarse aggregates. In recent years, a lot of attention has also been paid to the fine fraction obtained in the recycling process next to coarse aggregates (representing 60% of the waste volume). Comprehensive methods that allow complete processing of rubble concrete waste are welcome. It was considered necessary to conduct analyzes in the scope of improving concrete recycling technology with a focus on obtaining aggregates and recycling mortar with high parameters, which can be successfully re-included in the construction production cycle. This became the object of many years of research team work.


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Citations : 21

Journal of Materials Engineering and Applications received 21 citations as per Google Scholar report

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