The Utilization of the Finest Fraction of Recycled Aggregate from CDW for Concrete

Central Europe towards Sustainable Building

生态环境科学

Fortova, K.^1 ; Pavlu, T.^1

University Centre for Energy Efficient Buildings, Czech Technical University in Prague, Tinecká 1024, Buthrad

27343, Czech Republic^1

关键词: Aggregate skeletons;    Construction and demolition waste;    Deformation properties;    Fine recycled aggregate;    Mineral admixtures;    Ordinary concretes;    Properties of concretes;    Recycled aggregates;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/290/1/012013/pdf
DOI  :  10.1088/1755-1315/290/1/012013

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

The main aim of this study is to verify the use of fine recycled aggregate originating from construction and demolition waste. Fine fraction of aggregate up to 4 mm (sand) is commonly used for ordinary concrete. This research tests the properties of concrete whose sand content has been partially replaced by fine recycled aggregate. The use of these fine particles could reduce the consumption of natural sand. There were also tested samples with a mineral admixture up to 1 mm in size, which appear as dust during the crushing of waste concrete. The use of these fine particles fills pores between larger particles to make the aggregate skeleton of the concrete mixture denser. Furthermore, the fine particles can contain a small amount of unhydrated cement. The results of physical and mechanical and deformation properties of concrete mixtures are presented.