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Particle size effects on breakage of ACT aggregates under physical and environmental loadings

Particle size effects on breakage of ACT aggregates under physical and environmental loadings

Choi, Hun, Lake, Craig B. and Hills, Colin. (2019) Particle size effects on breakage of ACT aggregates under physical and environmental loadings. Journal of Hazardous, Toxic, and Radioactive Waste, 24 (1):04019029. ISSN 2153-5493 (Print), 2153-5515 (Online) (doi:https://doi.org/10.1061/(ASCE)HZ.2153-5515.0000468)

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Abstract

Aggregates manufactured from fine-grained thermal waste residues using accelerated carbonation technology (ACT) represent a potential sustainable alternative to natural aggregates. However, for these manufactured products to compete with virgin stone in geotechnical applications, their durability under mechanical and environmental loadings must be assessed. This paper describes the particle breakage that occurs for different grain sizes (entire sample, 5–2.5 mm and 2.5–1.25 mm) of a cement kiln dust accelerated carbonated manufactured aggregate after undergoing triaxial compression, triaxial shear, and freeze/thaw (f/t) testing. The particle breakage of the aggregate was dominated by the larger (5–2.5 mm) size fraction of the sample under all loading conditions. Particle breakage results from f/t testing indicated that the 5–2.5 mm size corresponded to similar or slightly less particle breakage than that under triaxial shear, whereas the particle breakage of the 2.5–1.25 mm aggregate after 20 cycles of freeze–thaw was relatively small. The performance of the carbonated aggregate in terms of relative breakage was similar or slightly better than the results for natural calcareous sand found in the literature.

Item Type: Article
Uncontrolled Keywords: manufactured aggregate, particle breakage, accelerated carbonation, compression, shear, freeze/thaw
Subjects: Q Science > QC Physics
T Technology > TA Engineering (General). Civil engineering (General)
Faculty / Department / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Department of Engineering Science
Last Modified: 10 Oct 2019 10:49
Selected for GREAT 2016: None
Selected for GREAT 2017: None
Selected for GREAT 2018: None
Selected for GREAT 2019: None
URI: http://gala.gre.ac.uk/id/eprint/25425

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