UCL Discovery
UCL home » Library Services » Electronic resources » UCL Discovery

Progress of carbonation in chloride contaminated concrete

Wang, Y; Basheer, PAM; Nanukuttan, S; Bai, Y; (2016) Progress of carbonation in chloride contaminated concrete. In: Proceedings of the 5th International Conference on the Durability of Concrete Structures. (pp. pp. 317-327). Purdue University Press: Shenzhen, China. Green open access

[img]
Preview
Text
Bai_Progress of carbonation in chloride contaminated concretes.pdf - Published version

Download (1MB) | Preview

Abstract

Concretes used in marine environment are generally under the cyclic effect of CO2 and chloride ions (Cl-). To date, the influence of carbonation on ingress of chloride ions in concretes has been widely studied; in comparison, study on the influence of Cl- on the progress of carbonation is limited. During the study, concretes were exposed to independent and combined mechanisms of carbonation and chloride ingress regimes. Profiles of apparent pH and chloride concentration were used to indicate the progress of carbonation and ingress of Cl- in concretes. From the apparent pH profile, a carbonation front and a carbonation boundary were characterized according to profile of consumed hydroxyl ions (OH-). Results show that carbonation was significantly slowed down due to the existence of Cl-, viz. the depth of carbonation boundary was decreased; the profile of consumed OH- became modest; the carbonation front for different mixes presented slightly different trends. For the sound concretes, carbonation generated microcracks on concrete surface and increased permeation properties; for the chloride contaminated concretes, due to the limited extent of carbonation, permeation properties did not present obvious difference.

Type: Proceedings paper
Title: Progress of carbonation in chloride contaminated concrete
Event: 5th International Conference on the Durability of Concrete Structures
Location: Shenzhen, China
Dates: 30 June 2016 - 01 July 2016
Open access status: An open access version is available from UCL Discovery
DOI: 10.5703/1288284316151
Publisher version: http://dx.doi.org/10.5703/1288284316151
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Carbonation, chloride ions, combined mechanism
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1523331
Downloads since deposit
5Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item