Journal article
The interrelationship between surface chemistry and rheology in alkali activated slag paste
Alireza Kashani, John L Provis, Greg G Qiao, Jannie SJ van Deventer
CONSTRUCTION AND BUILDING MATERIALS | ELSEVIER SCI LTD | Published : 2014
Abstract
Ground granulated blast furnace slag can react with an alkaline activating solution to form a cement-like binder based on a calcium-sodium aluminosilicate gel, which is a potential alternative to Portland cement in many applications. This study provides new information regarding the effect of activator type and dosage on rheology by monitoring changes in pH, particle surface charge (zeta potential), and heat evolution in the early stages of the reaction process. Sodium and potassium hydroxide silicate solutions, at two different M 2O (M: Na, K) dosages, are used here as activators. Alkali hydroxide activators cause a significant increase in the yield stress of an activated slag paste, especi..
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Funding Acknowledgements
This work has been funded through an Australian Research Council Linkage Project grant, co-funded by Zeobond Pty. Ltd., and also benefited from support through the Particulate Fluids Processing Centre, a Special Research Centre of the Australian Research Council. The participation of JLP was also supported by the Faculty of Engineering, University of Sheffield.