Next Article in Journal
The Mechanical Behavior of HAVAR Foils Using the Small Punch Technique
Previous Article in Journal
The Present SP Tests for Determining the Transition Temperature TSP on “U” Notch Disc Specimens
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Materials 2017, 10(5), 492; doi:10.3390/ma10050492

Prediction Model for the Carbonation of Post-Repair Materials in Carbonated RC Structures

Department of Architectural Engineering, Hanyang University, 1271 Sa 3-dong, Sangrok-gu, Ansan 15588, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Jorge de Brito
Received: 29 March 2017 / Revised: 24 April 2017 / Accepted: 28 April 2017 / Published: 3 May 2017
View Full-Text   |   Download PDF [3775 KB, uploaded 3 May 2017]   |  

Abstract

Concrete carbonation damages the passive film that surrounds reinforcement bars, resulting in their exposure to corrosion. Studies on the prediction of concrete carbonation are thus of great significance. The repair of pre-built reinforced concrete (RC) structures by methods such as remodeling was recently introduced. While many studies have been conducted on the progress of carbonation in newly constructed buildings and RC structures fitted with new repair materials, the prediction of post-repair carbonation has not been considered. In the present study, accelerated carbonation was carried out to investigate RC structures following surface layer repair, in order to determine the carbonation depth. To validate the obtained results, a second experiment was performed under the same conditions to determine the carbonation depth by the Finite Difference Method (FDM) and Finite Element Method (FEM). For the accelerated carbonation experiment, FDM and FEM analyses, produced very similar results, thus confirming that the carbonation depth in an RC structure after surface layer repair can be predicted with accuracy. The specimen repaired using inhibiting surface coating (ISC) had the highest carbonation penetration of 19.81, while this value was the lowest for the corrosion inhibiting mortar (IM) with 13.39 mm. In addition, the carbonation depth predicted by using the carbonation prediction formula after repair indicated that that the analytical and experimental values are almost identical if the initial concentration of Ca(OH)2 is assumed to be 52%. View Full-Text
Keywords: carbonation; repair; prediction; post repair; carbonation depth; FEM analysis; FDM analysis carbonation; repair; prediction; post repair; carbonation depth; FEM analysis; FDM analysis
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Lee, H.-M.; Lee, H.-S.; Singh, J.K. Prediction Model for the Carbonation of Post-Repair Materials in Carbonated RC Structures. Materials 2017, 10, 492.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top