Title: Investigating the effect of varying steel fibre ratios on the compressive and tensile characteristics of SIFCON

Authors: Yahya Sayah Shakhair; Muhammad Jawad Kadhim

Addresses: Department of Civil Engineering, University of Al-Qadisiyah, Qadisiyah, Iraq ' Department of Civil Engineering, University of Babylon, Hila, Iraq

Abstract: Slurry-infiltrated fibre concrete (SIFCON) combines the strengths of conventional concrete and high-performance fibres. It demonstrates exceptional strength, durability and resistance to cracking, making it suitable for diverse construction applications. SIFCON's enhanced mechanical properties, including tensile, flexural, and impact strength, render it ideal for structures requiring high load-bearing capacity and structural integrity. Comprised of cement, fine aggregates, and fibres, SIFCON provides an advanced solution for structures needing high strength, longevity, and crack control. The incorporated fibres arrest crack propagation through the matrix. Experiments have shown considerable improvements in SIFCON's strength with increasing steel fibre content. Compressive strength increased by 293%, split tensile strength by 612%, and direct tensile strength by 415% with steel fibres ranging from 2-6%. SIFCON's constituent materials, namely cement and fine aggregates, must meet specific physical property and testing standards. SIFCON represents a milestone innovation in construction materials, offering engineers and architects amplified properties compared to conventional concrete.

Keywords: SIFCON; compressive strength; tensile strength; steel fibre; silica fume; super plasticiser; dog bone test.

DOI: 10.1504/IJMRI.2026.150372

International Journal of Masonry Research and Innovation, 2026 Vol.11 No.1, pp.20 - 34

Received: 26 Sep 2023
Accepted: 11 Dec 2023
Published online: 12 Dec 2025 *

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