PSI - Issue 64

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ScienceDirect Structural Integrity Procedia 00 (2023) 000 – 000 Structural Integrity Procedia 00 (2023) 000 – 000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ Available online at www.sciencedirect.com ^ĐŝĞŶĐĞ ŝƌĞĐƚ

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

Procedia Structural Integrity 64 (2024) 1394–1401

SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Effect of Glass Fibre on Slag-Fly Ash based Geopolymer Concrete Shehroze Ali a , M. Neaz Sheikh b , Muhammad N. S. Hadi c, * a Department of Civil Engineering, NFC Institute of Engineering and Fertilizer Research, Faisalabad 38090, Pakistan b,c School of Civil, Mining, Environmental and Architechural Engineering, University of Wollongong, 2522, NSW, Australia Abstract Geopolymer concrete is a high strength environment friendly construction material. However, less ductility and high brittleness are the major challenges of the geopolymer concrete. The addition of fibres in concrete impedes the fracture propagation and improves the overall mechanical properties of the concrete. This study investigates the fresh and the hardened properties of ambient cured plain and glass fibre reinforced slag-fly ash based geopolymer concrete (SFGC). All the mixes were prepared using an alkaline solution, composed of 14 molar sodium hydroxide (NaOH) solution, and liquid sodium silicate (Na 2 SiO 3 ) with a modulus (SiO 2 /Na 2 O) ratio of 2.5. Alkali resistant glass fibres at the dosage of 1.5% by volume of the concrete were added to the mix to evaluate the workability, density, compressive strength and flexural strength of glass fibre reinforced slag-fly ash based geopolymer concrete (GF-SFGC). The experimental results indicated that the addition of glass fibres in SFGC mix reduced the workability and density of concrete. The average compressive strength of SFGC determined at 7, 28 and 56 days was decreased by approximately 2-4% by adding the glass fibres into the mix. However, the average 28-day flexural strength of GF SFGC was about 24% higher than the plain SFGC mix. Overall, GF-SFGC specimens remained intact even after the failure as compared to SFGC specimens. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Keywords: Glass fibre; slag-fly ash based geopolymer concrete; ambient curing; fresh properties; mechanical properties 1. Introduction The increasing demand of concrete for construction resulted in remarkable growth of cement industry around the world. In recent years, the annual demand of concrete has accelerated to approximately 15 billion tones, which caused a significant production of cement (Wang et al. 2017). However, cement production is highly energy SMAR 2024 – 7th International Conference on Smart Monitoring, Assessment and Rehabilitation of Civil Structures Effect of Glass Fibre on Slag-Fly Ash based Geopolymer Concrete Shehroze Ali a , M. Neaz Sheikh b , Muhammad N. S. Hadi c, * a Department of Civil Engineering, NFC Institute of Engineering and Fertilizer Research, Faisalabad 38090, Pakistan b,c School of Civil, Mining, Environmental and Architechural Engineering, University of Wollongong, 2522, NSW, Australia Abstract Geopolymer concrete is a high strength environment friendly construction material. However, less ductility and high brittleness are the major challenges of the geopolymer concrete. The addition of fibres in concrete impedes the fracture propagation and improves the overall mechanical properties of the concrete. This study investigates the fresh and the hardened properties of ambient cured plain and glass fibre reinforced slag-fly ash based geopolymer concrete (SFGC). All the mixes were prepared using an alkaline solution, composed of 14 molar sodium hydroxide (NaOH) solution, and liquid sodium silicate (Na 2 SiO 3 ) with a modulus (SiO 2 /Na 2 O) ratio of 2.5. Alkali resistant glass fibres at the dosage of 1.5% by volume of the concrete were added to the mix to evaluate the workability, density, compressive strength and flexural strength of glass fibre reinforced slag-fly ash based geopolymer concrete (GF-SFGC). The experimental results indicated that the addition of glass fibres in SFGC mix reduced the workability and density of concrete. The average compressive strength of SFGC determined at 7, 28 and 56 days was decreased by approximately 2-4% by adding the glass fibres into the mix. However, the average 28-day flexural strength of GF SFGC was about 24% higher than the plain SFGC mix. Overall, GF-SFGC specimens remained intact even after the failure as compared to SFGC specimens. © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers Keywords: Glass fibre; slag-fly ash based geopolymer concrete; ambient curing; fresh properties; mechanical properties 1. Introduction The increasing demand of concrete for construction resulted in remarkable growth of cement industry around the world. In recent years, the annual demand of concrete has accelerated to approximately 15 billion tones, which caused a significant production of cement (Wang et al. 2017). However, cement production is highly energy © 2024 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

* Corresponding author. Tel.: +612-4221-4762; fax:+612-4221-3238 E-mail address: mhadi@uow.edu.au * Corresponding author. Tel.: +612-4221-4762; fax:+612-4221-3238 E-mail address: mhadi@uow.edu.au

2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers 2452-3216 © 2024 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of SMAR 2024 Organizers

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