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Change in microstructure and compressive strength of alkali-activated slag paste at temperature exposure of 50°C
conference contribution
posted on 2012-11-16, 00:00 authored by N Jambunathan,, G Li, A Korayem,, Z Pan, W H Duan, Frank CollinsFrank Collins, J SanjayanThis paper presents a study on the evolution of strength and alteration microstructure of alkali-activated slag (AAS) pastes exposed to 50°C. Ground granulated blast furnace slag (GGBFS) was used as the
starting material to prepare slags pastes which were then activated with a range of activators. The preliminary results from the study of these pastes are presented. It was found that all the pastes show a significantly
strength loss after exposure to 50°C for 24 hours. This is independent on the activators used. The paste samples were further examined by X-ray diffraction (XRD), differential thermal analysis (DTA), scanning electron
microscopy (SEM) and sorptivity tests. A hypothesis for strength loss is proposed based on the observations in change of microstructure. This hypothesis will be further validated by the study of the AAS pastes
prepared by using phosphorus slags.
starting material to prepare slags pastes which were then activated with a range of activators. The preliminary results from the study of these pastes are presented. It was found that all the pastes show a significantly
strength loss after exposure to 50°C for 24 hours. This is independent on the activators used. The paste samples were further examined by X-ray diffraction (XRD), differential thermal analysis (DTA), scanning electron
microscopy (SEM) and sorptivity tests. A hypothesis for strength loss is proposed based on the observations in change of microstructure. This hypothesis will be further validated by the study of the AAS pastes
prepared by using phosphorus slags.
History
Event
ACUN-6 Composites and Nanocomposites in Civil, Offshore and Mining Infrastructure. International Composites Conference (6th : 2012 : Melbourne, Victoria)Series
ACUN International Composites ConferencePagination
367 - 372Publisher
ACUN-6 Monash UniversityLocation
Melbourne, VictoriaPlace of publication
Clayton, Vic.Start date
2012-11-14End date
2012-11-16ISBN-13
978-0-646-58589-5Language
engPublication classification
E1.1 Full written paper - refereed; E Conference publicationCopyright notice
2012, ACUN-6 Monash UniversityEditor/Contributor(s)
Y Bai, S Bandyopadhyay, X Zhao, R Singh, S RizkallaTitle of proceedings
ACUN6 2012 – Proceedings of the 6th International Composites Conference on Composites and Nanocomposites in Civil, Offshore and Mining InfrastructureUsage metrics
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