Bernal Lopez, S. orcid.org/0000-0002-9647-3106, Ke, X., Hussein, O. et al. (1 more author) (Accepted: 2016) Effect of testing condition on the loss on ignition results of anhydrous granulated blast furnace slags determined via thermogravimetry. In: Segment on Concrete with Supplementary Cementitious Materials. International RILEM Conference on Materials, Systems and Structures in Civil Engineering (MSSCE), 21-24 Aug 2016, Lyngby, Denmark. PRO113 - Proceedings of the International RILEM conference Materials, Systems and Structures in Civil Engineering, segment on Concrete with Supplementary Cementitious Materials . RILEM Publications S.A.R.L. , Lyngby, Denmark , p. 299. ISBN 978-2-35158-178-0
Abstract
A key property influencing the quality of a blast furnace slag (GBFS) used in cements and concretes is the loss on ignition (LOI), which is associated with the amount of moisture and carbonates present. Both EN and ASTM standards describe determination of the LOI of GBFS, and thermogravimetric analysis (TGA) is also a valuable test which provides information that can be related to the LOI. However, the final mass loss obtained by TGA is influenced by the testing conditions including nature and flowrate of the gas used, the sample mass and heating rate, and there is no existing standard method for TGA of SCMs. As part of the efforts of RILEM TC 238-SCM, this study assesses the effect of the gas environment and gas flowrate on the observed mass loss from a GBFS, determined via TGA in nitrogen, argon or air atmospheres using different gas flowrates, and without correction for oxidation of sulfides to sulfates. Significant mass changes occur between 800–1000 C independent of the gas used, and are more notable under an oxidising atmosphere and at low gas flowrates. These results elucidate that it is required to standardise TGA testing parameters for analysis of GBFS to enable collection of meaningful results by this technique.
Metadata
Item Type: | Proceedings Paper |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2016 RILEM. This is an author produced version of a paper subsequently published in PRO113 - Proceedings of the International RILEM conference Materials, Systems and Structures in Civil Engineering, segment on Concrete with Supplementary Cementitious Materials. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
|
Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Materials Science and Engineering (Sheffield) |
Funding Information: | Funder Grant number EUROPEAN RESEARCH COUNCIL GeopolyConc - 335928 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 14 Sep 2016 12:27 |
Last Modified: | 26 Oct 2016 11:33 |
Published Version: | https://files.conferencemanager.dk/medialibrary/2A... |
Status: | Published |
Publisher: | RILEM Publications S.A.R.L. |
Series Name: | PRO113 - Proceedings of the International RILEM conference Materials, Systems and Structures in Civil Engineering, segment on Concrete with Supplementary Cementitious Materials |
Refereed: | Yes |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:104315 |