Effect of rice husk ash addition on the compressive strength and thermal stability of metakaolin based geopolymer

Liang, Guangwei and Zhu, Huajun and Zhang, Zuhua and Wu, Qisheng (2019) Effect of rice husk ash addition on the compressive strength and thermal stability of metakaolin based geopolymer. Construction and Building Materials, 222. pp. 872-881. ISSN 0950-0618

Abstract

The influences of rice husk ash incorporated as partial replacement (by up to 40%) of metakaolin on the thermal stability and microstructures of metakaolin based geopolymer were investigated in this paper. The results indicate that the aluminosilicate fractions of RHA were associated with the acid-base reaction of geopolymerization, promoting the more formation of gels. The pores of geopolymer were refined by the filling effects of rice husk ash and enrichment of gel phases, which were primary reason for the optimization of geopolymer thermal stability. The geopolymer added with RHA maintained excellent comprehensive performance in comparison to OPC paste after high temperature exposure. This is attributed to the different microstructure between geopolymer and OPC. Addition of 30% RHA would make the best contribution to the strength of geopolymer before or after temperature exposure significantly.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials (1 Jan 2017 -)
Date Deposited: 20 Jan 2020 04:59
Last Modified: 30 Jan 2020 02:41
Uncontrolled Keywords: Rice husk ash, Metakaolin, Geopolymer, Compressive strength, Pore structure, Thermal stability
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
Socio-Economic Objective: B Economic Development > 87 Construction > 8703 Construction Materials Performance and Processes > 870301 Cement and Concrete Materials
Identification Number or DOI: 10.1016/j.conbuildmat.2019.06.200
URI: http://eprints.usq.edu.au/id/eprint/37684

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