Recycled Self-Compacting Concrete: Mechanical Behavior and Durability
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2022-07-01
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American Concrete Institute
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Abstract
Increasing sustainability is currently one of the main objectives of the construction sector. One of the most widespread sustainable practices to reach this goal is the recycling of industrial residues within concrete mixes. What began as a practice to produce low-quality concrete has now spread, for example, to Self-Compacting Concrete (SCC), which has a high flowability in the fresh state. Recycled Concrete Aggregate (RCA) is a waste that can be used to develop SCC of good mechanical performance. RCA produced from the crushing of rejected precast components for the prefabricated concrete industry is assessed in this study. It was demonstrated that the addition of 100 % coarse RCA and 50 % fine RCA contributed to the production of an SCC with adequate flowability and an optimal mechanical and durability behavior. To do so, the design of the mixture, its flowability, its strength behavior at different curing ages and its performance in freeze/thaw, moist/dry and sulfate-attack tests are discussed. The study is complemented by analyzing the interaction of RCA with different natural fine aggregates, such as siliceous or limestone sand. It is concluded that the SCC developed with large amounts of RCA was of sufficient strength and durability for general usage.
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Publisher Copyright: © 2022 American Concrete Institute. All rights reserved.
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Compressive strength , Durability behavior , Flowability , Freeze/thaw test , Mechanical performance , Moist/dry test , Recycled Concrete Aggregate , Self-compacting concrete , Sulfate-attack test , Civil and Structural Engineering , Building and Construction , General Materials Science , SDG 9 - Industry, Innovation, and Infrastructure , SDG 12 - Responsible Consumption and Production
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Revilla-Cuesta , V , Skaf , M , Chica , J A , Serrano-López , R & Ortega-López , V 2022 , Recycled Self-Compacting Concrete : Mechanical Behavior and Durability . in D Coffetti , L Coppola & T Holland (eds) , Recent Advances in Concrete Technology and Sustainability Issues - Conference Proceedings, 15th International Conference . American Concrete Institute, ACI Special Publication , vol. SP-355 , American Concrete Institute , pp. 53-68 , 15th International Conference on Recent Advances in Concrete Technology and Sustainability Issues , Milan , Italy , 13/07/22 .
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