ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Similarity of Chloride Diffusivity of Concrete Exposed to Different Environments

Author(s): Jun-Zhi Zhang, Xiao-Yun Zhou, Jing Zhao, Meng Wang, Yan-Hong Gao, and Yu-Rong Zhang

Publication: Materials Journal

Volume: 117

Issue: 5

Appears on pages(s): 27-37

Keywords: chloride; instantaneous diffusion coefficient; similarity; simulated environment

Date: 9/1/2020

Abstract:
According to the main meteorological parameters and chloride concentration of field exposure tests, indoor artificial climate and dry-wet cycle simulated tests were designed to investigate the similarity of apparent and instantaneous diffusion coefficients in different ambient environments. Results show that chloride diffusion coefficients increased with water-cement ratio (w/c) and decreased with exposure time, regardless of the environment. Besides, instantaneous diffusion coefficients are all less than the corresponding apparent diffusion coefficients; their differences decrease with the increasing of w/c and show first a decrease and then gradually an increasing trend with exposure time. Environmental factors have little effect on the similarity constant of instantaneous diffusion coefficients. A quadratic function can be used to describe the relationship between age reduction factors of apparent and instantaneous diffusion coefficients and w/c in different environments. According to the Second Similarity Theorem, specimens exposed to a natural tidal environment for 240 days can be simulated by that exposed to an artificial climate simulated environment for 80 days effectively.




  

Please enter this 5 digit unlock code on the web page.