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https://dspace.ffh.bg.ac.rs/handle/123456789/1080| Title: | Improved compressive strength of alkali activated slag upon heating | Authors: | Nikolić, Irena Karanović, Ljiljana Častvan, Ivona Janković Radmilović, Vuk Mentus, Slavko Radmilović, Velimir |
Keywords: | Alkali activated slag;Amorphous materials;Porous materials;Sintering;Steel slag;Thermal properties | Issue Date: | 15-Oct-2014 | Journal: | Materials Letters | Abstract: | This paper presents a study on thermal stability of alkali activated slag (AAS) prepared from electric arc furnace slag (EAFS) using a mixture of alkaline sodium hydroxide and sodium silicate solutions. The samples were investigated by means of XRD, SEM, TG/DTA and porosity analysis. Compressive strengths of AAS samples before and after exposure to elevated temperatures ranging from 600 °C to 1000°C were determined. The significant microstructural modifications highlighted by changes in porosity due to the sintering process are responsible for the strengthening of AAS sample after heating at 600,800 and 1000°C. Moreover, in AAS sample after heating to and above 600 °C wüstite transforms to spinel. © 2014 Elsevier B.V. |
URI: | https://dspace.ffh.bg.ac.rs/handle/123456789/1080 | ISSN: | 0167-577X | DOI: | 10.1016/j.matlet.2014.07.021 |
| Appears in Collections: | Journal Article |
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