Effects of type and dosage of alkaline activator and temperature on the properties of alkali-activated slag mixtures

In this paper the results of a study on the influence of sodium hydroxide, sodium carbonate, and sodium silicate, as activators, and temperatures in the range of 20–31 °C on the setting time and workability of the fresh alkali-activated slag cement (AAS) mixtures are presented. The results obtained...

Full description

Saved in:
Bibliographic Details
Published in:Construction & building materials 2007-07, Vol.21 (7), p.1463-1469
Main Author: Zivica, Vladimir
Format: Article
Language:English
Subjects:
Alkali activation
Analysis
Evaluation
Fresh mixtures
Setting
Slag cement
Sodium carbonate
Sodium hydroxide
Sodium silicate
Workability
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In this paper the results of a study on the influence of sodium hydroxide, sodium carbonate, and sodium silicate, as activators, and temperatures in the range of 20–31 °C on the setting time and workability of the fresh alkali-activated slag cement (AAS) mixtures are presented. The results obtained show a significant acceleration of the setting of the AAS mixtures versus the setting of ordinary Portland cements. The highest acceleration of the setting was found with sodium silicate, while both sodium hydroxide and sodium carbonate show a moderate effect. The increase of temperature of the mixtures shows the acceleration of setting and decrease of workability. At the sodium silicate a continuous effect was observed as temperature was increased. But with sodium hydroxide and sodium carbonate a sudden acceleration of the setting, and workability decrease were observed, when the temperature reached the values 24–29 °C.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2006.07.002