By Marco Pepe
This booklet studies at the actual and mechanical characterization of Recycled mixture Concrete (RAC), produced via a partial-to-total alternative of standard aggregates with what were dubbed Recycled Concrete Aggregates (RCAs). It proposes a theoretical framework for realizing the relationships among RCAs and RCA, and for predicting the ensuing habit of RAC. The ebook demonstrates that during the case of RAC extra parameters must be taken under consideration than with traditional aggregates, end result of the composite nature and better porosity of RCAs. by means of extending Abrams’ legislations for Recycled combination Concrete, it represents a primary step within the formula of a basic version for predicting the homes of RAC. The theoretical technique awarded right here addresses a tremendous hole within the literature and is anticipated to stimulate new study at the use of this extra sustainable kind of concrete in structural applications.
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Additional info for A Conceptual Model for Designing Recycled Aggregate Concrete for Structural Applications
Moreover, in the last section an innovative alternative processing procedure for RCAs is proposed. The analysis of the experimental results available for RCA particles led to proposing some analytical formulations intended at correlating the main engineering properties of RCAs. 1 State of the Art for Recycled Concrete Aggregates (RCAs) The following sections present an overview of the processing procedures and the current state-of-the-art for RCAs. 1 Processing Procedures This section reports the main alternative processes for producing recycled concrete aggregates from demolition waste.
Sand and cement). For these reasons, the possible test methods that can be performed on aggregate particles con be related to one single particle or to the bulk of aggregates. In this research, the mechanical behaviour of RCAs has been evaluated by performing the compressive strength test on single particles. Moreover, it is worth highlighting that the results presented in this section are not aimed at determining an absolute value of the mechanical performance of RCAs, but they are rather intended at comparing their behaviour with ordinary natural aggregates.
In this respect, only ACI 555 R-01, among the current regulations, offer precise indications about a selective process of demolition intended at safeguarding the quality of RCAs. Conversely, the processing procedure implemented for producing recycled aggregates is generally designed by operator companies, according to their speciﬁc practices. 8 Main Conclusions Drawn from Existing Regulations and Standards 25 A total replacement of coarse natural aggregates is allowed only for non-structural concrete, due to the decrease of compressive strength that generally occurs considering the recycled material source.
A Conceptual Model for Designing Recycled Aggregate Concrete for Structural Applications by Marco Pepe