Ogirigbo, OR and Black, L (2015) Influence of slag composition and curing duration on the performance of slag blends in chloride environments. In: Proceedings: International Conference on Sustainable Structural Concrete. International Conference on Sustainable Structural Concrete, 15-18 Sep 2015, La Plata, Argentina. RILEM , pp. 110-119. ISBN 978-987-3838-02-6
Abstract
This study investigated the influence of chemical composition of Ground Granulated Blast Furnace Slag (GGBS) and curing duration on the performance of slag-cement blends; specifically strength and transport properties. Two slags (1 and 2) with Ca/Si ratios of 1.05 and 0.94 respectively, were used to partially replace 30% of a CEM I 52.5R cement. Various tests, including compressive strength, isothermal calorimetry, water absorption, sorptivity, and chloride ingress were conducted on mortar specimens to measure the performance of the slag blends against a CEM I 42.5R cement. The mortar specimens were pre-cured for 7 and 28 days before exposure to a 3% sodium chloride solution. Two different exposure conditions were studied (one in which the samples were submerged completely in the salt solution, and the other in which the samples were subjected to a 6 hr wetting and drying cycle). The results obtained showed similar performance for both slags at longer curing durations; with the more basic slag 1 exhibiting better transport properties than slag 2 for both exposure conditions at shorter curing durations. This suggests that curing duration as well as variation in chemical composition of slags affects the performance of slag blends in chloride environments.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Keywords: | Compressive strength; water absorption; sorptivity; basicity ratio; cyclic chloride exposure; calorimetry |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) > Institute for Resilient Infrastructure (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 27 Oct 2015 10:19 |
Last Modified: | 26 Feb 2016 15:33 |
Status: | Published |
Publisher: | RILEM |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:91187 |