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Concretes with recycled aggregates of construction and demolition waste and mineral additions: a bibliographic analysis

ABSTRACT

The environmental impact caused by the production of concrete must be reduced to make it a more sustainable material. The use of recycled aggregates in place of natural aggregates and mineral admixture in partial replacement to cement are alternatives that can make concrete a material with lower load of pollutants associated with your production. Using the methodology of ProKnow-C (Knowledge Development Process – Construtivist), was performed a selection and analysis of articles to assess the scene of recent research on concrete with recycled aggregate from construction waste and demolition (CDW) combined with different kinds of mineral admixture. Through the ProKnow-C methodology was obtained a bibliographic portfolio composed of eleven papers. The portfolio items were analyzed to assess which mineral additions and ratio that were used and your efficiency to improve mechanical performance and durability of the recycled aggregate concrete in total or partial replacement to the natural aggregate, both fine and coarse. Research has shown that recycled aggregates of CDW can be used at higher replacement ratio for natural aggregates when combined with the use of some kind of mineral admixture. Among the additions used in research evaluated are silica fume, fly ash and granulated blast furnace slag and each type of admixture used presents an ideal ratio to be used in partial replacement for the cement.

Keywords
Mineral admixture; recycled aggregate; construction and demolition waste; ProKnow-C

Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro, em cooperação com a Associação Brasileira do Hidrogênio, ABH2 Av. Moniz Aragão, 207, 21941-594, Rio de Janeiro, RJ, Brasil, Tel: +55 (21) 3938-8791 - Rio de Janeiro - RJ - Brazil
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