Sustainable Application of Fine Recycled-Concrete Aggregate in Soil-Nailing Grout
Publication: Journal of Materials in Civil Engineering
Volume 33, Issue 8
Abstract
The use of construction and demolition waste is an effective solution to mitigate their environmental impacts and avoid dispose in landfills. This paper aims to evaluate the use of fine recycled-concrete aggregate (FRCA) in grout mixtures used in soil nailing. Compressive strength tests on FRCA grout were carried out at different curing ages and interface shear strength was measured between soil and grout. Properties of a commonly used cement grout are compared with those of sand-cement grout and FRCA-cement grout. Although the FRCA grout shows a lower compressive strength compared to commonly used grout and sand-cement grout, its measured properties still meet the minimum standards requirements. The interface friction angle and adhesion of the FRCA exhibit higher values compared to those measured at the soil–soil interface. The grout mixtures evaluated in this study indicated that it is possible to use 1.126 kg of FRCA for each cubic meter of grout. The consumptions of cement and water were found to be 42% and 24% lower, respectively. This represents approximately 380 kg less of emissions into the atmosphere per cubic meter. The use of FRCA in soil nail grouting can be a sustainable alternative to reduce environmental impacts, cement consumption, and greenhouse gas emission.
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Data Availability Statement
All data used during the study appear in the published article.
Acknowledgments
The authors would like to acknowledge Research Grant No. 51778166 provided by the National Science Foundation of China. Our gratitude is also given to Foundation Araucária (PR-Brazil), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES-Brazil), and Federal University of Paraná (PPGECC/UFPR-Brazil).
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 33 • Issue 8 • August 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Jun 23, 2020
Accepted: Dec 29, 2020
Published online: May 27, 2021
Published in print: Aug 1, 2021
Discussion open until: Oct 27, 2021
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