Whittaker, M, Dubina, E, Al-Mutawa, F et al. (3 more authors) (2013) The effect of prehydration on the engineering properties of CEM I Portland cement. Advances in Cement Research, 25 (1). 12 - 20. ISSN 0951-7197
Abstract
Prehydration; the reaction between anhydrous cement and water vapour, has deleterious effects on engineering properties including compressive strength, workability and setting time. This study has assessed changes in engineering properties of CEM I Portland cement exposed to relative humidities of 60% or 85% for 7 and 28 days. Thin layers of CEM I 42.5R cement, no more than 2 mm thick, were exposed to controlled relative humidities of 60 and 85%., followed by assessment of compressive strength, setting time and workability. These measurements were complemented by characterising the prehydrated anhydrous cement using isothermal calorimetry, scanning electron microscopy, x-ray diffraction and thermal gravimetric analysis. Following prehydration at 60% relative humidity, conventional hydration resulted in a negligible reduction in strength development plus a decrease in workability and increase in setting time. At 85% relative humidity, compressive strength was greatly reduced, particularly at early ages. There was also a greater loss of workability and increase in setting time.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | (c) 2013, Thomas Telford (ICE Publishing). Reproduced in accordance with the publisher's self-archiving policy. Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees(http://www.icevirtuallibrary.com/content/journals). |
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: | 24 Apr 2014 10:33 |
Last Modified: | 23 Jun 2023 21:39 |
Published Version: | http://dx.doi.org/10.1680/adcr.12.00030 |
Status: | Published |
Publisher: | Thomas Telford (ICE Publishing) |
Identification Number: | 10.1680/adcr.12.00030 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:78557 |