International Journal of Concrete Structures and Materials

Korea Concrete Institute (한국콘크리트학회)
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On Probability Distribution of Chloride Diffusion Coefficient for Recycled Aggregate Concrete

  • Ying, Jingwei (College of Civil Engineering & Architecture, Guangxi University) ;
  • Xiao, Jianzhuang (Department of Structural Engineering, Tongji University) ;
  • Meng, Qiujiang (College of Civil Engineering & Architecture, Guangxi University)
  • Received : 2015.08.12
  • Accepted : 2015.12.20
  • Published : 2016.03.30
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Abstract

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

Keywords

Acknowledgement

Supported by : National Natural Science Foundation of China (NSFC), China Postdoctoral Science Foundation, Guangxi Natural Science Foundation

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