Nawaz, M, Heitor, A orcid.org/0000-0002-2346-8250 and Sivakumar, M (2023) Triaxial Stress-Strain Behavior of a Novel Basalt Rock Wasteand Ground Granulated Blast Furnace Slag Geopolymer. Journal of Materials in Civil Engineering, 35 (5). ISSN 0899-1561
Abstract
Basalt rock waste is a major industrial waste generated as a result of quarrying rocks and artificial sand manufacture for construction projects, and its disposal can lead to several landfill hazards. However, it shows potential to be used as a source material for the manufacture of geopolymers. This paper presents the triaxial stress-strain characteristics of a novel geopolymer developed from basalt rock waste considering partial replacement with ground granulated blast furnace slag (GGBFS) up to 30%. A detailed mix design investigation revealed the optimum molarity (M) of the sodium hydroxide solution to be 8M and the optimum ratio (R) of sodium silicate to sodium hydroxide solution to be 0.75. The axial stress-strain relationships were developed after a series of triaxial laboratory tests for low confining pressures (0 to 800 kPa) and Hoek cell tests for high confining pressures (1 to 5 MPa). A constitutive model predicting the complete stress-strain behavior is proposed. The geopolymer stress-strain behavior shows some degree of similarity to Portland cement binder; however, differences such as an increase in stiffness and reduction in ductility were observed. Scanning electron microscopy (SEM) images also suggested a dense geopolymer gel formation resulting in a homogeneous and compact microstructure. This study demonstrates that the innovative material proposed herein produced from industrial wastes has characteristics suitable for use as an alternative and sustainable construction material.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 American Society of Civil Engineers. This is an author produced version of an article published in Journal of Materials in Civil Engineering. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Basalt rock waste; Ground granulated blast furnace slag (GGBFS); Geopolymer; Microstructure; Triaxial; Stress-strain behavior. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Civil Engineering (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 12 Aug 2022 11:44 |
Last Modified: | 02 Mar 2023 13:18 |
Status: | Published |
Publisher: | American Society of Civil Engineers |
Identification Number: | 10.1061/(ASCE)MT.1943-5533.0004717 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:189907 |