Properties of Self-Compacting Concrete Prepared with Coarse Recycled Concrete Aggregates and Different Water:Cement Ratios
Publication: Journal of Materials in Civil Engineering
Volume 31, Issue 2
Abstract
The purpose of this study is to analyze the influence of recycled coarse aggregates (RCA) used to manufacture self-compacting concrete with recycled aggregates (SCRC) by evaluating the characteristics of this concrete, particularly its self-compactibility. Another aim is to determine the simple compressive strength at 28 days and the durability (water penetration and carbonation). The concrete was prepared with different RCA percentages (0%, 20%, 40%, 60%, 80%, and 100%) and water:cement (w/c) ratios of 0.45, 0.50, and 0.55. A constant percentage of superplasticizer was added, and two saturation methods were analyzed with a ratio, one before and one during mixing. The results indicate that using up to 20% RCA has little influence on the characteristics of the SCRC, meaning that SCRC can be prepared with up to 40% substitutes, depending on the water:cement ratio.
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Acknowledgments
We wish to thank the Polytechnic University of Madrid and specifically the staff of the Materials Laboratory at the School of Civil Engineering for their support in conducting the tests, especially Juan and Aurelio. Thank you to Prointec S.A., without whose understanding and flexibility this work would not have been possible. Thanks also to the following companies: Sika, Bravo Concrete, Grupo Cementos Portland Valderrivas, and Tec-Rec, for the materials they provided to conduct this study.
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Published In
Journal of Materials in Civil Engineering
Volume 31 • Issue 2 • February 2019
Copyright
©2018 American Society of Civil Engineers.
History
Received: Aug 29, 2017
Accepted: Jul 17, 2018
Published online: Nov 27, 2018
Published in print: Feb 1, 2019
Discussion open until: Apr 27, 2019
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