Influence of different fibers on properties of thermal insulation composites based on geopolymer blended with glazed hollow bead

Su, Zhihao and Guo, Liang and Zhang, Zuhua and Duan, Ping (2019) Influence of different fibers on properties of thermal insulation composites based on geopolymer blended with glazed hollow bead. Construction and Building Materials, 203. pp. 525-540. ISSN 0950-0618


Abstract

In this work, fly ash and slag were used as aluminosilicate raw materials to prepare geopolymer paste, and different fibers and glazed hollow beads (GHB) were incorporated into the paste to produce various series of fiber reinforced geopolymer composites. The preparation process of geopolymer composites was explored and the optimum preparation conditions was obtained. Compressive strength, flexural strength, water absorption, porosity, thermal conductivity, linear shrinkage rate, microstructure and morphology have been characterized and assessed. Polypropylene fiber, alkali resistant glass fiber and lignin fibers were added to improve the cracking resistance and to enhance the strength. The results show that the optimal strength of fiber reinforced GHB blended geopolymer is obtained with 15% GHB addition, 0.75% fiber addition and liquid-solid ratio of 1.1. The improving effect of fibers on enhancing and anti-shrinkage follows the following sequence: PP fiber, alkali resistant glass fiber and lignin fiber. It is also observed that the fiber not only prevents the separation of the GHB and geopolymer matrix, but also inhibits the generation and expansion of the cracks, and finally improves the strength regardless of hybrid fibers or single fiber.


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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: 28 Jan 2020 05:10
Last Modified: 30 Jan 2020 02:56
Uncontrolled Keywords: Geopolymer, Fiber reinforce, Glazed hollow beads, Polypropylene fiber
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: doi:0.1016/j.conbuildmat.2019.01.121
URI: http://eprints.usq.edu.au/id/eprint/37697

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