Properties and composition of recycled aggregates from construction and demolition waste suitable for concrete production

Performance enhancement of recycled concrete aggregate – A review

Construction and demolition waste generation and properties of recycled aggregate concrete: A global perspective

Recycling of waste concrete has become an important issue worldwide due to the continued increase of construction wastes. Also, the growing global construction activities urge to find sustainable resources to replace natural materials for the production of concrete. In the past few decades, many researches have been carried out on the use of recycled aggregate (RA) derived from construction and demolition wastes to produce concrete products. This paper reviews the previous findings on the effects of use of RA on durability of concrete. In general, the amount of adhered mortar and the quality of the original concrete have a significant effect on the properties of resulting concrete. The increase of RA content and w/c ratio results in poorer durability of concrete. In comparison, the negative effect of recycled fine aggregate is more obvious than that of recycled coarse aggregate. The use of pozzolanic materials either for surface coating of RA or intermixed within the concrete are effective and feasible to improve the overall durability of concrete. Recent researches on CO2 treatment indicate that it can enhance the properties of RA and durability of concrete significantly.

Durability of recycled aggregate concrete – A review

Construction and demolition waste constitutes a large fraction of all the waste generated in Europe. Its specific impact can be considered rather low, but the large generated volume and embodied resource makes this waste stream an important focus of current European policies. The European Commission has proposed new targets and goals for this waste stream in the Circular Economy package, but, given the rather heterogeneous landscape of waste management practice across Member States, new approaches that take into account the entire value chain of the construction sector are urgently required. This paper synthesises core principles and linked best practices for the management of construction and demolition waste across the entire construction value chain. Systematic implementation of these best practices could dramatically improve resource efficiency and reduce environmental impact by: reducing waste generation, minimising transport impacts, maximising re-use and recycling by improving the quality of secondary materials and optimising the environmental performance of treatment methods.

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Construction and demolition waste best management practice in Europe

Mechanical performance of concrete made with aggregates from construction and demolition waste recycling plants

Concrete made with used tyre aggregate: durability-related performance

Durability performance of concrete with recycled aggregates from construction and demolition waste plants

Influence of water-reducing admixtures on the mechanical performance of recycled concrete

https://fenix.tecnico.ulisboa.pt/downloadFile/395142107302/Extended%20abstract.pdf

Miguel Bravo

Papers

Mechanical performance of concrete made with aggregates from construction and demolition waste recycling plants

Concrete made with used tyre aggregate: durability-related performance

Durability performance of concrete with recycled aggregates from construction and demolition waste plants

Influence of water-reducing admixtures on the mechanical performance of recycled concrete

Construction and demolition waste indicators