Increasing mechanical strength and acid resistance of geopolymers by incorporating different siliceous materials

Zhang, Wei and Yao, Xiao and Yang, Tao and Liu, Cun and Zhang, Zuhua (2018) Increasing mechanical strength and acid resistance of geopolymers by incorporating different siliceous materials. Construction and Building Materials, 175. pp. 411-421. ISSN 0950-0618

Abstract

This study, for the first time, reports using hollow glass microsphere waste (HGMW) and quartz powder (QP) to improve compressive strength and sulphuric acid resistance of fly ash/slag based geopolymers (AAFS), which is aimed for oil-gas well cementing and other uses where acid corrosion medium exists. Due to the lower reactivity of HGMW and QP compared to fly ash and slag, their incorporation needs a high temperature curing process (at 80 °C in this study) to obtain a certain extent of reaction. The resulting product with 5% HGMW and 5% QP exhibits higher compressive strength than the neat AAFS. After sulphuric exposure for 90 days, the high temperature cured samples show less susceptibility to the acid attack in comparison with those samples cured at room temperature and those without HGMW and QP. It is confirmed that better resistance of acid attack of the 80 °C cured mixture with addition of HGMW and QP than the neat AAFS mixture is due to the more crosslinked and compact microstructure. In addition, the volume stability of the geopolymer binders is also assessed and is found to be satisfying under both the ambient and high temperature conditions.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Future Materials
Date Deposited: 04 Feb 2019 04:11
Last Modified: 05 Feb 2019 02:04
Uncontrolled Keywords: geopolymer; acid resistance; fly ash; slag; quartz sand; pore structure
Fields of Research : 09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Funding Details:
Identification Number or DOI: 10.1016/j.conbuildmat.2018.03.195
URI: http://eprints.usq.edu.au/id/eprint/35291

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