V2I12P10

“A Comprehensive Study on Sisal Fiber–Reinforced Concrete with Silica Fume as a Cementitious Modifier”

Ankit Gupta^1*, Prof. Kamlesh Kumar Choudhary²

Abstract

Traditionally, sisal fibers have been used for ropes, mats, carpets, and decorative products, but in recent decades, their application in civil engineering—especially in cementitious composites—has gained substantial importance. This study provides an overview of the recent advancements in sisal fiber–reinforced concrete (SFRC). Key characteristics of sisal fibers, their interaction with the concrete matrix, and their influence on fresh properties, mechanical strength, and durability were critically examined. The results indicate that the addition of sisal fibers decreases the flowability/workability of concrete due to increased internal friction and water absorption. However, the mechanical and durability properties significantly improve when fibers are added in suitable proportions. For the compressive strength evaluation, the conventional concrete specimen is designated as CC, while the sisal fiber–reinforced specimen is labelled S-2.0. The compressive strength of SFRC (S-2.0) was found to be 38.75 N/mm², and the maximum compressive strength achieved in the modified mix was 43.75 N/mm². After 28 days of curing, the strength increased by 46.59% compared with the control concrete. Similarly, for the split tensile strength, the specimen S-2.0 showed a value of 6.67 N/mm², representing a 46.59% increase over the conventional concrete mix after 28 days. This demonstrates that sisal fibers significantly enhance the tensile performance by improving crack resistance and energy absorption capacity.

Keywords:

Conventional concrete, Reinforced Concrete, Sisal Fibres Concrete, Compressive Strength, Tensile Strength and Flexural Strength