Enhancing Structural Performance: Fiber Reinforcement in Sintered Flyash Lightweight Concrete for Impact Resistance and Toughness

V Navin Ganesh; N Divyah; R Rajkumar

doi:10.17485/IJST/v17i15.368

Article

Enhancing Structural Performance: Fiber Reinforcement in Sintered Flyash Lightweight Concrete for Impact Resistance and Toughness

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Indian Journal of Science and Technology

DOI: 10.17485/IJST/v17i15.368

Year: 2024, Volume: 17, Issue: 15, Pages: 1577-1585

Original Article

Enhancing Structural Performance: Fiber Reinforcement in Sintered Flyash Lightweight Concrete for Impact Resistance and Toughness

V Navin Ganesh^1*, N Divyah², R Rajkumar³

¹Assistant Professor (Selection Grade), Department of Civil Engineering, PSG Institute of
Technology and Applied Research, Coimbatore, Tamil Nadu, India
²Assistant Professor, Department of Civil Engineering, PSG Institute of Technology and
Applied Research, Coimbatore, Tamil Nadu, India
³Associate Professor, Department of Civil Engineering, PSG Institute of Technology and
Applied Research, Coimbatore, Tamil Nadu, India

*Corresponding Author
Email: [email protected]

Received Date:16 February 2024, Accepted Date:26 March 2024, Published Date:12 April 2024

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

Objectives: The goal of this project is to better understand the interaction between fibers and concrete in order to produce Light Weight Aggregate Concrete (LWAC) with improved structural performance that is made from recycled materials, such as sintered flyash aggregate, and LWAC structures that are more resistant to impact loads and other dynamic forces. Methods: The sintered flyash aggregates are added as coarse aggregate to the concrete and basalt fiber (0.25% of mix) is used as a secondary reinforcement to improve the energy absorption, impact resistance and toughness behaviour. M30 grade of concrete was arrived after laboratory trials after which the mechanical properties were evaluated. The effect of drop impact load on slabs of size 300mm x 300mm x 50mm reinforced with two layers of bundled wire mesh was studied. The flexural properties of concrete reinforced with fiber prism of size 500mm x 100mm x 100mm were evaluated. Findings: With the addition of fiber, ﬂexural toughness index and post-cracking toughness were increased notably on the initial deflections and cracks. The conventional fiber reinforced concrete exhibited a superior peak load capacity compared to normal weight concrete, with a measured increase of 7.5%. Conversely, normal-weight concrete demonstrated a significantly higher deflection under load, exceeding that of fiber reinforced concrete by 47%. LWAC displayed a distinct increase in both peak load (18.7%) and deflection (39.13%) when compared to Normal Weight Aggregate Concrete (NWAC). The incorporation of basalt fiber enhanced the energy absorption by 150% in NWAC and 80% in LWAC. Novelty: The incorporation of fiber into lightweight concrete reduces the brittle nature of failure. The post-cracking toughness behaviour was enhanced because of the effect of crack-arresting by fibers. After the first break, it was discovered to retain residual strength, and removing the fibers from the matrix required more force.

Keywords: Sintered flyash aggregate, Light weight concrete, Basalt fiber, Toughness, Impact load, Energy absorption

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Copyright

© 2024 Ganesh et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Published By Indian Society for Education and Environment (iSee)