Mechanical and Thermal Performance of High-strength Concrete Reinforced with Steel and Coir Fibers Under Elevated Temperatures

Abstract

Recent developments in concrete technology, especially over the last decade, have enabled the commercial development of high-strength concrete (HSC). This study investigates the performance of HSC reinforced with single and hybrid fibers, specifically steel and coir fibers. The findings reveal a significant improvement in mechanical properties, particularly compressive and split tensile strengths, with optimal performance observed when hybridizing 2% steel fiber with 0.2% coir fiber. The study also evaluates the thermal performance of HSC under elevated temperatures, demonstrating that steel fibers help maintain structural integrity, while coir fibers contribute positively, especially in hybrid mixes. Additionally, the use of coir fiber, a renewable and biodegradable material, enhances sustainability by reducing reliance on synthetic fibers and promoting eco-friendly construction practices. Recommendations include incorporating coir fiber at a volume fraction of 0.1% to 0.2% to achieve optimal mechanical performance without compromising quality. This research provides valuable insights for advancing durable, cost-efficient, and environmentally friendly hybrid fiber-reinforced HSC.

Department(s)

Civil, Architectural and Environmental Engineering

Keywords and Phrases

coir fiber; High strength concrete; hybrid fiber reinforced concrete; steel fiber

International Standard Serial Number (ISSN)

2470-5322; 2470-5314

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2025 Taylor and Francis Group; Taylor and Francis, All rights reserved.

Publication Date

01 Jan 2025

Link to Full Text

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