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Title: Macroscopic and microstructural properties of engineered cementitious composites incorporating recycled concrete fines
Authors: Li, Junxia
Yang, En-Hua
Keywords: Recycled concrete fines
Engineered cementitious composites
Issue Date: 2017
Source: Li, J., & Yang, E. -H. (2017). Macroscopic and microstructural properties of engineered cementitious composites incorporating recycled concrete fines. Cement and Concrete Composites, 78, 33-42.
Series/Report no.: Cement and Concrete Composites
Abstract: Recycled concrete fines (RCF) are fine aggregates and particles from the demolition waste of old concrete. Unlike recycled coarse aggregates, RCF is seldom used to replace sands in concrete due to its high surface area and attached old mortar on the surface of RCF. This study investigated potential use of RCF as microsilica sand substitute in the production of engineered cementitious composites (ECC), a unique high performance fiber-reinforced cementitious composites featuring extreme tensile strain capacity of several percent. The results showed that it is viable to use RCF as microsilica sand substitute in the production of ECC and the resulting RCF-ECCs possess decent compressive strength and strain capacity. Microstructure investigation on the component level revealed that RCF size and content modify matrix toughness and fiber/matrix interface properties. The influence of RCF size and content on ECC properties was clearly revealed and explained by the resulting fiber bridging σ(δ) curves of RCF-ECCs calculated from the micromechanical model. Micromechanics-based design principle can therefore be used for ingredients selection and component tailoring of RCF-ECCs.
ISSN: 0958-9465
DOI: 10.1016/j.cemconcomp.2016.12.013
Schools: School of Civil and Environmental Engineering 
Interdisciplinary Graduate School (IGS) 
Research Centres: Nanyang Environment and Water Research Institute 
Residues and Resource Reclamation Centre 
Rights: © 2017 Elsevier. This is the author created version of a work that has been peer reviewed and accepted for publication by Cement and Concrete Composites, Elsevier. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles
IGS Journal Articles
NEWRI Journal Articles

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