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The main objective of this research is to investigate the utilization criteria of the recycled aggregatesgained from construction and demolition wastes, in the production of various ready-mixed and precastconcrete elements. Within this scope, construction and demolition waste materials were selectively separatedto have homogeneous concrete wastes in the recycling plant. Then, fine and coarse aggregateswere achieved from concrete wastes. Recycled concrete aggregates were than crushed to specific sizes;physical properties were determined and compared with those of normal aggregates. Finally, these recycledaggregates were investigated about their utility in the industrial production of various concreteproducts like ready-mixed concrete, concrete pipe, paving stone and kerbs. Also some studies were doneto determine durability and permeability properties of these products. It can be concluded that the use ofrecycled aggregates in the production of various concrete elements is possible with proper separation andclassification. Moreover, lower replacement rates should be applied to obtain sufficient conditions whichare specified in related product standards
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