| Issue |
MATEC Web Conf.
Volume 199, 2018
International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR 2018)
|
|
|---|---|---|
| Article Number | 02008 | |
| Number of page(s) | 6 | |
| Section | Concrete Deteriorating Mechanisms and Prediction of Durability | |
| DOI | https://doi.org/10.1051/matecconf/201819902008 | |
| Published online | 31 October 2018 | |
Effects of concrete quality and natural Johannesburg environment on concrete carbonation rate
Department of Civil Engineering and Building, Vaal University of Technology, Vanderbijlpark, South Africa
* Corresponding author: jacobi@vut.ac.za
This study presents the results of a project undertaken to study the combined effects of concrete quality (binder type, w/b, and duration of initial moist curing) and natural Johannesburg environment on carbonation rate of concretes containing 100% PC, 35% fly ash (FA), 50% ground granulated blast-furnace slag (BS), 10% silica fume (SF) and (30% BS + 10% SF). The results show that apart from the SF blended concretes, the carbonation rate of the SCM blended concretes are higher than the PC concretes. Reducing the w/b and increasing the duration of initial moist curing reduced the carbonation rate in the concretes. The indoor exposed concretes have the highest carbonation rates and reducing the w/b ratio is more efficient and sustainable in lowering the carbonation rate rather than extending the duration of the initial moist curing.
© The Authors, published by EDP Sciences, 2018
This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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