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Experimental investigation of engineered alkali-activated fibrous geopolymer concrete

Experimental investigation of engineered alkali-activated fibrous geopolymer concrete In this study sugarcane bagasse ash (SCA) and rice husk ash (RHA) is utilized in the preparation of geopolymer concrete (GC) along with high-strength basalt (BS) fibres. SCA being rich in alumina and RHA being rich in silica provided a better combination for the preparation of GC. The alkaline activator used is a combination of NaOH and Na2SiO3. Naphthalene-based superplasticizer is used to enhance the workability of GC mixes. The percentage of BS fibres in the GC mixes is provided as an admixture in various percentages of 0, 0.5, 1.0, 1.5, 2.0, and 2.5%. The mix with 0% BS fibres is treated as a control mix. The results revealed that the mix with 1% BS fibres attained the highe workability. Seven, twenty-eight, and fifty-six days compressive, split tensile, and flexural strength of mix with 1% BS fibres is the highest of all other mixes including the control mix. Water absorption and acid attack of mix with 1% BS fibres are the lowest of all other mixes including the control mix. The width of the interfacial transition zone (ITZ) between the fibre and the matrix has been reduced in the mixes with 0.5 and 1% BS fibres and then it decreases with the increase in BS fibre content. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Building Pathology and Rehabilitation Springer Journals

Experimental investigation of engineered alkali-activated fibrous geopolymer concrete

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References (69)

Publisher
Springer Journals
Copyright
Copyright © The Author(s), under exclusive licence to Springer Nature Switzerland AG 2022. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
ISSN
2365-3159
eISSN
2365-3167
DOI
10.1007/s41024-022-00259-x
Publisher site
See Article on Publisher Site

Abstract

In this study sugarcane bagasse ash (SCA) and rice husk ash (RHA) is utilized in the preparation of geopolymer concrete (GC) along with high-strength basalt (BS) fibres. SCA being rich in alumina and RHA being rich in silica provided a better combination for the preparation of GC. The alkaline activator used is a combination of NaOH and Na2SiO3. Naphthalene-based superplasticizer is used to enhance the workability of GC mixes. The percentage of BS fibres in the GC mixes is provided as an admixture in various percentages of 0, 0.5, 1.0, 1.5, 2.0, and 2.5%. The mix with 0% BS fibres is treated as a control mix. The results revealed that the mix with 1% BS fibres attained the highe workability. Seven, twenty-eight, and fifty-six days compressive, split tensile, and flexural strength of mix with 1% BS fibres is the highest of all other mixes including the control mix. Water absorption and acid attack of mix with 1% BS fibres are the lowest of all other mixes including the control mix. The width of the interfacial transition zone (ITZ) between the fibre and the matrix has been reduced in the mixes with 0.5 and 1% BS fibres and then it decreases with the increase in BS fibre content.

Journal

Journal of Building Pathology and Rehabilitation – Springer Journals

Published: Jun 1, 2023

Keywords: Sugarcane bagasse ash; Basalt fibres; Geopolymer concrete

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