Chloride Diffusion Analysis of Concrete Members Considering Depth-Dependent Diffusion Coefficients and Effect of Reinforcement Presence: Fid-Bau Portal

Fachinformationsdienst BAUdigital

A platform for research: civil engineering, architecture and urbanism

Chloride Diffusion Analysis of Concrete Members Considering Depth-Dependent Diffusion Coefficients and Effect of Reinforcement Presence

Wang, Yuanzhan / Li, Qingmei / Lin, Chen’anpan

This paper presents the results of an experimental investigation on chloride diffusion in plain concretes and reinforced concretes. Concretes were exposed to chloride environment simulated by a self-designed tidal circulation device for 35, 70, and 100 days. Chloride concentrations ( ${Cl}^{-}$ ) in powder samples which were milled layer-by-layer from plain concretes and drilled along the direction of rebar from reinforced concretes were measured. ${Cl}^{-}$ at the apex of the rebar were compared to that at the corresponding depth in plain concretes to study the blocking effect of rebar. Meanwhile, diffusion coefficients ( $D_{x}$ ) at different depths were determined by applying Fick’s second law to study the depth-dependent characteristic of ${Cl}^{-}$ diffusion. The results show that along the direction of penetration, $D_{x}$ decreases first and then increases; rebar does change the distribution of ${Cl}^{-}$ , and the larger the diameter, the greater the effect. The effect of rebar is not only embodied in the physical obstruction but also in the variations in concrete composition. Based on the results obtained, a quantitative chloride diffusion model considering rebar presence, depth-dependent characteristics, and time is given.

Access

Check availability in my library

Order at Subito €

Page navigation

Document information

Export, share and cite

Chloride Diffusion Analysis of Concrete Members Considering Depth-Dependent Diffusion Coefficients and Effect of Reinforcement Presence

Wang, Yuanzhan / Li, Qingmei / Lin, Chen’anpan

This paper presents the results of an experimental investigation on chloride diffusion in plain concretes and reinforced concretes. Concretes were exposed to chloride environment simulated by a self-designed tidal circulation device for 35, 70, and 100 days. Chloride concentrations ( ${Cl}^{-}$ ) in powder samples which were milled layer-by-layer from plain concretes and drilled along the direction of rebar from reinforced concretes were measured. ${Cl}^{-}$ at the apex of the rebar were compared to that at the corresponding depth in plain concretes to study the blocking effect of rebar. Meanwhile, diffusion coefficients ( $D_{x}$ ) at different depths were determined by applying Fick’s second law to study the depth-dependent characteristic of ${Cl}^{-}$ diffusion. The results show that along the direction of penetration, $D_{x}$ decreases first and then increases; rebar does change the distribution of ${Cl}^{-}$ , and the larger the diameter, the greater the effect. The effect of rebar is not only embodied in the physical obstruction but also in the variations in concrete composition. Based on the results obtained, a quantitative chloride diffusion model considering rebar presence, depth-dependent characteristics, and time is given.

Chloride Diffusion Analysis of Concrete Members Considering Depth-Dependent Diffusion Coefficients and Effect of Reinforcement Presence

Wang, Yuanzhan / Li, Qingmei / Lin, Chen’anpan

This paper presents the results of an experimental investigation on chloride diffusion in plain concretes and reinforced concretes. Concretes were exposed to chloride environment simulated by a self-designed tidal circulation device for 35, 70, and 100 days. Chloride concentrations ( ${Cl}^{-}$ ) in powder samples which were milled layer-by-layer from plain concretes and drilled along the direction of rebar from reinforced concretes were measured. ${Cl}^{-}$ at the apex of the rebar were compared to that at the corresponding depth in plain concretes to study the blocking effect of rebar. Meanwhile, diffusion coefficients ( $D_{x}$ ) at different depths were determined by applying Fick’s second law to study the depth-dependent characteristic of ${Cl}^{-}$ diffusion. The results show that along the direction of penetration, $D_{x}$ decreases first and then increases; rebar does change the distribution of ${Cl}^{-}$ , and the larger the diameter, the greater the effect. The effect of rebar is not only embodied in the physical obstruction but also in the variations in concrete composition. Based on the results obtained, a quantitative chloride diffusion model considering rebar presence, depth-dependent characteristics, and time is given.

Access

Check availability in my library

Order at Subito €

Page navigation

Document information

Export, share and cite

Document information

Title:

Chloride Diffusion Analysis of Concrete Members Considering Depth-Dependent Diffusion Coefficients and Effect of Reinforcement Presence

Contributors:

Wang, Yuanzhan (author) / Li, Qingmei (author) / Lin, Chen’anpan (author)

Published in:

Journal of Materials in Civil Engineering ; 28

Publication date:

2015-11-04

ISSN:

0899-1561 , 1943-5533

DOI:

https://doi.org/10.1061/(ASCE)MT.1943-5533.0001425

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

Unknown

Similar titles

Chloride Diffusion Analysis of Concrete Members Considering Depth-Dependent Diffusion Coefficients and Effect of Reinforcement Presence

Li, Qingmei | Online Contents | 2016

Chloride Diffusion Analysis of Concrete Members Considering Depth-Dependent Diffusion Coefficients and Effect of Reinforcement Presence

Wang, Yuanzhan / Li, Qingmei / Lin, Chen'anpan | British Library Online Contents | 2016

Time-and-Depth-Dependent Model of Chloride Diffusion Coefficient for Concrete Members Considering the Effect of Coarse Aggregate

Wang, Yuanzhan / Liu, Chenxi / Wang, Yuchi et al. | ASCE | 2017

Time-and-Depth-Dependent Model of Chloride Diffusion Coefficient for Concrete Members Considering the Effect of Coarse Aggregate

Wang, Yuanzhan / Liu, Chenxi / Wang, Yuchi et al. | British Library Online Contents | 2018

The use of bulk diffusion tests to establish time-dependent concrete chloride diffusion coefficients

Stanish, Kyle | Online Contents | 2003