On the variability of chloride diffusion in modelled recycled aggregate concrete

Jingwei Ying; Jianzhuang Xiao; Vivian W. Y. Tam

doi:10.1016/j.conbuildmat.2012.12.031

On the variability of chloride diffusion in modelled recycled aggregate concrete

Jingwei Ying, Jianzhuang Xiao, Vivian W. Y. Tam

School of Engineering, Design & Built Environment

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

This paper proposes a new model to describe effects of recycled coarse aggregate (RCA) distribution on chloride diffusion from four modelled recycled aggregate concrete (RAC) with different RCA replacement ratios (RRA). Chloride diffusivities of each type of the modelled RAC are experimentally investigated using a rapid chloride migration (RCM) equipment and are simulated by a finite element method (FEM). The results show that the chloride diffusivities of the modelled RAC generally increase with the increase of R RA; while for the same RRA, the chloride diffusivities and the chloride concentration distribution in the modelled RAC are still different due to the effect of different aggregate arrangements; the chloride concentration distribution characteristics in the FEM model are verified using RCM testing; the variability of the modelled RAC for both chloride migration and compressive strength show consistent tendency, which can provide insights into RAC mix design.

Original language	English
Pages (from-to)	732-741
Number of pages	10
Journal	Construction and Building Materials
Volume	41
DOIs	https://doi.org/10.1016/j.conbuildmat.2012.12.031
Publication status	Published - 2013

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10.1016/j.conbuildmat.2012.12.031

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title = "On the variability of chloride diffusion in modelled recycled aggregate concrete",

abstract = "This paper proposes a new model to describe effects of recycled coarse aggregate (RCA) distribution on chloride diffusion from four modelled recycled aggregate concrete (RAC) with different RCA replacement ratios (RRA). Chloride diffusivities of each type of the modelled RAC are experimentally investigated using a rapid chloride migration (RCM) equipment and are simulated by a finite element method (FEM). The results show that the chloride diffusivities of the modelled RAC generally increase with the increase of R RA; while for the same RRA, the chloride diffusivities and the chloride concentration distribution in the modelled RAC are still different due to the effect of different aggregate arrangements; the chloride concentration distribution characteristics in the FEM model are verified using RCM testing; the variability of the modelled RAC for both chloride migration and compressive strength show consistent tendency, which can provide insights into RAC mix design.",

author = "Jingwei Ying and Jianzhuang Xiao and Tam, {Vivian W. Y.}",

year = "2013",

doi = "10.1016/j.conbuildmat.2012.12.031",

language = "English",

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journal = "Construction and Building Materials",

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T1 - On the variability of chloride diffusion in modelled recycled aggregate concrete

AU - Ying, Jingwei

AU - Xiao, Jianzhuang

AU - Tam, Vivian W. Y.

PY - 2013

Y1 - 2013

N2 - This paper proposes a new model to describe effects of recycled coarse aggregate (RCA) distribution on chloride diffusion from four modelled recycled aggregate concrete (RAC) with different RCA replacement ratios (RRA). Chloride diffusivities of each type of the modelled RAC are experimentally investigated using a rapid chloride migration (RCM) equipment and are simulated by a finite element method (FEM). The results show that the chloride diffusivities of the modelled RAC generally increase with the increase of R RA; while for the same RRA, the chloride diffusivities and the chloride concentration distribution in the modelled RAC are still different due to the effect of different aggregate arrangements; the chloride concentration distribution characteristics in the FEM model are verified using RCM testing; the variability of the modelled RAC for both chloride migration and compressive strength show consistent tendency, which can provide insights into RAC mix design.

AB - This paper proposes a new model to describe effects of recycled coarse aggregate (RCA) distribution on chloride diffusion from four modelled recycled aggregate concrete (RAC) with different RCA replacement ratios (RRA). Chloride diffusivities of each type of the modelled RAC are experimentally investigated using a rapid chloride migration (RCM) equipment and are simulated by a finite element method (FEM). The results show that the chloride diffusivities of the modelled RAC generally increase with the increase of R RA; while for the same RRA, the chloride diffusivities and the chloride concentration distribution in the modelled RAC are still different due to the effect of different aggregate arrangements; the chloride concentration distribution characteristics in the FEM model are verified using RCM testing; the variability of the modelled RAC for both chloride migration and compressive strength show consistent tendency, which can provide insights into RAC mix design.

UR - http://handle.uws.edu.au:8081/1959.7/530358

U2 - 10.1016/j.conbuildmat.2012.12.031

DO - 10.1016/j.conbuildmat.2012.12.031

M3 - Article

SN - 0950-0618

VL - 41

SP - 732

EP - 741

JO - Construction and Building Materials

JF - Construction and Building Materials

ER -

On the variability of chloride diffusion in modelled recycled aggregate concrete

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