PSI - Issue 70

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ScienceDirect

Procedia Structural Integrity 70 (2025) 588–595

Structural Integrity and Interactions of Materials in Civil Engineering Structures (SIIMCES-2025) Performance of Eco-Sustainable Geopolymer Mortar with Neem Fibre Kavitha E. a, *, M. Seenirajan a , R. A. Shivasakthivadivelan b , R. Udhayasakthi c , L. Reena d , Nisha Thakur e

a Department of Civil Engineering, Sengunthar Engineering College, Tiruchengode -637 205,India. b Department of Civil Engineering, Annapoorna Engineering College,Salem -636308,India. c Site Engineer, Tamilnadu Water Investment Company limited, Chennai - 600 032, India . d Department of Civil Engineering, Builders Engineering College. Kangayam, Tirupur- 638108, India. e Department of Civil Engineering, Bajaj Institute of Technology, Wardha-442001, India.

Abstract In recent years, a new and innovative inorganic cementitious material, the geopolymer binder, has emerged, offering mechanical properties comparable to conventional concrete of concrete and successfully lowering the emission of CO 2 and environmental pollutants during the production of cementitious composites. Furthermore, the geopolymer matrix can be reinforced with natural fibres which offer extra advantages including increased tensile and flexural strength, decreased density, and better thermal and acoustic insulation qualities. Therefore, this investigation is mainly focused on usage of neem fibre as natural fibre in geopolymer mortar with 50% of Fly-Ash (FA)and Ground Granulated Blast Furnace Slag (GGBFS) each. The mortar was taken in the ratio of 1:3 with the two different molarities of 10M and 12M. The neem fibre of length 20mm was chosen. The neem fibre was added in the percentage of 0.0, 0.25, 0.5, 0.75 and 1. The experimental work is carried out on 10 different mix combinations to examine the workability properties, compressive and flexural strength of mortar and durability performance compared with cement mortar. The mortar mix with 12M alkali concentration and 0.5% neem fibre addition exhibited significant compressive and flexural properties. © 2025 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 the responsibility of International Conference on Structural Integrity Organizers

Keywords: Neem fibre; Geopolymer Composites; Natural Fibre; Flyash; GGBS

*Corresponding author. Tel.: +91 9865768948 E-mail address: kavi13suga@gmail.com

2452-3216 © 2025 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 the responsibility of International Conference on Structural Integrity Organizers 10.1016/j.prostr.2025.07.094