Chemical acceleration of a neutral granulated blast-furnace slag activated by sodium carbonate
| dc.contributor.author | Kovtun, Maxim | |
| dc.contributor.author | Kearsley, Elsabe P. | |
| dc.contributor.author | Shekhovtsova, Julia | |
| dc.contributor.email | max.kovtun@up.ac.za | en_ZA |
| dc.date.accessioned | 2015-05-28T10:25:31Z | |
| dc.date.available | 2015-05-28T10:25:31Z | |
| dc.date.issued | 2015-06 | |
| dc.description.abstract | This paper presents results of a study on chemical acceleration of a neutral granulated blast-furnace slag activated using sodium carbonate. As strength development of alkali-activated slag cements containing neutral GBFS and sodium carbonate as activator at room temperature is known to be slow, three accelerators were investigated: sodium hydroxide, ordinary Portland cement and a combination of silica fume and slaked lime. In all cements, themain hydration product is C–(A)–S–H, but its structure varies between tobermorite and riversideite depending on the accelerator used. Calcite and gaylussite are present in all systems and they were formed due to either cation exchange reaction between the slag and the activator, or carbonation. With accelerators, compressive strength up to 15 MPa can be achieved within 24 h in comparison to 2.5 MPa after 48 h for a mix without an accelerator. | en_ZA |
| dc.description.embargo | 2016-06-30 | en_ZA |
| dc.description.librarian | hb2015 | en_ZA |
| dc.description.uri | http://ees.elsevier.com/CEMCON/default.asp | en_ZA |
| dc.identifier.citation | Kovtun, M, Kearsley, EP & Shekhovtsova, J 2015, 'Chemical acceleration of a neutral granulated blast-furnace slag activated by sodium carbonate', Cement and concrete research, vol. 72, pp. 1-9. | en_ZA |
| dc.identifier.issn | 0008-8846 (print) | |
| dc.identifier.issn | 1873-3948 (online) | |
| dc.identifier.other | 10.1016/j.cemconres.2015.02.014 | |
| dc.identifier.uri | http://hdl.handle.net/2263/45324 | |
| dc.language.iso | en | en_ZA |
| dc.publisher | Elsevier | en_ZA |
| dc.rights | © 2015 Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Cement and Concrete Research.Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Cement and Concrete Research, vol. 72, pp. 1-9, 2015. doi :10.1016/j.cemconres.2015.02.014 | en_ZA |
| dc.subject | Alkali-activated cement (D) | en_ZA |
| dc.subject | Acceleration (A) | en_ZA |
| dc.subject | Admixture (D) | en_ZA |
| dc.subject | Compressive strength (C) | en_ZA |
| dc.subject | Hydration products (B) | en_ZA |
| dc.subject.other | Engineering, built environment and information technology articles SDG-09 | |
| dc.subject.other | SDG-09: Industry, innovation and infrastructure | |
| dc.title | Chemical acceleration of a neutral granulated blast-furnace slag activated by sodium carbonate | en_ZA |
| dc.type | Postprint Article | en_ZA |