Effects of fly ash and silica fume on disintegration of alkali-activated slag at temperature exposure of 50°C

Li, Z.R., Liu, Y., Pan, Z., Duan, W.H., Collins, Francis and Sanjayan, J. 2012, Effects of fly ash and silica fume on disintegration of alkali-activated slag at temperature exposure of 50°C, in ACUN-6 2012 – Proceedings of the 6th International Composites Conference on Composites and Nanocomposites in Civil, Offshore and Mining Infrastructure, Monash Univesity, Clayton, Vic., pp. 227-232.

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Title Effects of fly ash and silica fume on disintegration of alkali-activated slag at temperature exposure of 50°C
Author(s) Li, Z.R.
Liu, Y.
Pan, Z.
Duan, W.H.
Collins, FrancisORCID iD for Collins, Francis orcid.org/0000-0001-6331-5390
Sanjayan, J.
Conference name ACUN-6 Composites and Nanocomposites in Civil, Offshore and Mining Infrastructure. International Composites Conference (6th : 2012 : Melbourne, Victoria)
Conference location Melbourne, Victoria
Conference dates 14 - 16 Nov. 2012
Title of proceedings ACUN-6 2012 – Proceedings of the 6th International Composites Conference on Composites and Nanocomposites in Civil, Offshore and Mining Infrastructure
Editor(s) Bai, Yu
Bandyopadhyay, Sri
Zhao, Xiao-Ling
Singh, Raman
Rizkalla, Sami
Publication date 2012
Series ACUN International Composites Conference
Conference series ACUN International Composites Conference
Start page 227
End page 232
Total pages 5
Publisher Monash Univesity
Place of publication Clayton, Vic.
Summary The compressive strength of alkali-activated slag (AAS) paste can be adversely affected by temperature. AAS paste loses its strength when exposed to 50°C for 24 hours. The objective of the current investigation is to evaluate two different mineral admixtures, i.e. fly ash and silica fume, in preventing AAS paste from strength loss. The effect of the above admixtures at various dosages on strength loss was assessed by measuring the retention of compressive strength of samples after exposed to 50°C. Results indicate that the admixtures reduced strength loss. Compared with the fly ash, the silica fume performs better at preventing AAS paste from strength loss. After exposure to 50°C, the use of silica fume to replace 15% of slag reduces the strength loss by 70%. The possible reason for this is discussed based on x-ray diffraction results.
ISBN 9780646585895
Language eng
Field of Research 090505 Infrastructure Engineering and Asset Management
090503 Construction Materials
Socio Economic Objective 870301 Cement and Concrete Materials
HERDC Research category E1.1 Full written paper - refereed
ERA Research output type E Conference publication
Copyright notice ©2012, ACUN-6 Monash University
Persistent URL http://hdl.handle.net/10536/DRO/DU:30080771

Document type: Conference Paper
Collections: Institute for Frontier Materials
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