On Probability Distribution of Chloride Diffusion Coefficient for Recycled Aggregate Concrete

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Title: On Probability Distribution of Chloride Diffusion Coefficient for Recycled Aggregate Concrete

Author(s): Jingwei Ying, Jianzhuang Xiao, and Qiujiang Meng

Publication: IJCSM

Volume: 10

Issue: 1

Appears on pages(s): 61–73

Keywords: recycled aggregate concrete (RAC), recycled coarse aggregate (RCA), old attached mortar, chloride diffusion coefficient, probability density evolution method (PDEM)

Date: 3/31/2016

Abstract:
In predicating the probability distribution of chloride diffusion coefficient of recycled aggregate concrete (DRAC), themorphological characteristics of three phases, i.e., the old attached mortar, the natural aggregate and the new mortar, should all betaken into account. The present paper attempts to develop a probability density evolution method (PDEM) to achieve this. Afterverifying the derived PDEM results with experimental results, the effects of old attached mortar to the DRAC are examined in aquantitative manner. It is found that (1) the variation of the attached mortar content is much sensitive to DRAC; (2) given theprobability distribution of the content and chloride diffusion coefficient of old mortar, the probability distribution of DRAC can beanalysed based on the PDEM; and (3) the critical chloride diffusion coefficient at a certain assurance rate can be obtained by thePDEM. The analysis results of this investigation will be valuable to the durability design for RAC.


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