Abstract
Recycled concrete aggregates (RCA) is one of the most prevalent construction waste products what is regularly used in the road construction industry. Besides many advantages, substances leaching from RCA are emphasised as the most involving the environmental problem. The research investigated metals leaching characteristics from RCA by carrying out a detailed experimental method with many influential factors to grasp the most influencing factors on the metal leaching regime. Research outcomes disclosed that the integrated influences of factors are changed to RCA, while individual metals released are also influenced following to varied ways. Liquid-to-solid ratios (L/S) significantly affect leaching metals from RCA controlling saturated conditions, facilitating high metal concentrations in the leachate. Interestingly, the larger degree of compaction leading to increasing density of materials displayed the highest negative influence on metal leachability, suggesting that the metal release can considerably decrease, especially when the RCA is used for the sub-base road layers with a high degree of compaction. However, the use of recycled construction materials under field conditions should be further studied as there is an increasing concern of metal leaching from RCA with respect to recreational and drinking water thresholds.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
References
Vieira CS, Pereira PM (2015) Use of recycled construction and demolition materials in geotechnical applications: A review. Resour Conserv Recycl 103:192–204
Rao A, Jha KN, Misra S (2007) Use of aggregates from recycled construction and demolition waste in concrete. Resour Conserv Recycl 50:71–81
Sakanakura H, Osako M, Kida A (2009) Effect of exposure test conditions on leaching behavior of inorganic contaminants from recycled materials for roadbeds. Waste Manage 29:1658–1665
Butera S, Christensen TH, Astrup TF (2014) Composition and leaching of construction and demolition waste: inorganic elements and organic compounds. J Hazard Mater 276:302–311
Van der Sloot H, Dijkstra J (2004) Development of horizontally standardized leaching tests for construction materials: a material based or release based approach?: Identical leaching mechanisms for different materials, ECN
A. ANZECC (2000) Australian and New Zealand Environment and Conservation Council and Agriculture and Resource Management Council of Australia and New Zealand, Australian and New Zealand guidelines for fresh and marine water quality, Canberra, pp 1–103
Exley C (2016) The toxicity of aluminium in humans. Morphologie 100:51–55
Ritter KS, Sibley P, Hall K, Keen P, Mattu G, Linton BL (2002) Sources, pathways, and relative risks of contaminants in surface water and groundwater: a perspective prepared for the Walkerton inquiry. J Toxicol Environ Health Part A 65:1–142
Fraga CG, Oteiza PI (2002) Iron toxicity and antioxidant nutrients. Toxicology 180:23–32
Author information
Authors and Affiliations
Corresponding author
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2024 The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
About this paper
Cite this paper
Hung, V.Q., Egodawatta, P., Gallage, C., Dawes, L. (2024). Leaching Mechanism of Metals from Recycled Concrete Aggregates (RCA) and Potentially Environmental Issues. In: Nguyen-Xuan, T., Nguyen-Viet, T., Bui-Tien, T., Nguyen-Quang, T., De Roeck, G. (eds) Proceedings of the 4th International Conference on Sustainability in Civil Engineering. ICSCE 2022. Lecture Notes in Civil Engineering, vol 344. Springer, Singapore. https://doi.org/10.1007/978-981-99-2345-8_8
Download citation
DOI: https://doi.org/10.1007/978-981-99-2345-8_8
Published:
Publisher Name: Springer, Singapore
Print ISBN: 978-981-99-2344-1
Online ISBN: 978-981-99-2345-8
eBook Packages: EngineeringEngineering (R0)