CUED Publications database

Effect of different MgO on the hydration of MgO-activated granulated ground blastfurnace slag paste

Jin, F and Abdollahzadeh, A and Al-Tabbaa, A (2013) Effect of different MgO on the hydration of MgO-activated granulated ground blastfurnace slag paste. In: UNSPECIFIED.

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Abstract

© 2013 Sustainable Construction Materials and Technologies. All rights reserved. Reactive MgO recently emerged as a potential activator for granulated ground blast-furnace slag (GGBS), which is one of the most widely used by-products in the cement industry. However, it is known that the characteristics of reactive MgO vary significantly, which may affect the activation process. In this study, seven commercial reactive MgOs, whose reactivities vary widely, were chosen to activate GGBS. The unconfined compressive strength of the MgO-GGBS paste at up to 90 days was measured. It was found that both the reactivity and composition of the MgO samples have effects on the strength development. The major hydration products were identified as hydrotalcite-like phases (Ht) and calcium silicate hydrate (CSH) using X-ray diffraction (XRD). The microstructural characteristic was examined by scanning electron microscopy (SEM). It is concluded that the characteristics of MgO (e.g., reactivity, composition) significantly influence the performance of MgO-GGBS blends.

Item Type: Conference or Workshop Item (UNSPECIFIED)
Subjects: UNSPECIFIED
Divisions: Div D > Geotechnical and Environmental
Depositing User: Cron Job
Date Deposited: 09 Aug 2018 01:26
Last Modified: 11 Jul 2019 02:29
DOI: