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The IUP Journal of Structural Engineering :

The Effect of Aspect Ratio of Steel Fibers on the Tensile Behavior of Standard Concrete (M30)

Article Details

Pub. Date	: Apr, 2019
Product Name	: The IUP Journal of Structural Engineering
Product Type	: Article
Product Code	: IJSE51904
Author Name	: V Kesava Raju and K Srinivasa Rao
Availability	: YES
Subject/Domain	: Science and Technology
Download Format	: PDF Format
No. of Pages	: 17

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Abstract

The paper makes an experimental investigation on standard concrete of M30 grade with the addition of steel fibers having different aspect ratios. The fibers were hookend type with aspect ratios of 40, 50 and 60. The percentages of steel fibers by weight of cement were 1%, 2%, 3% and 4%. M30 grade of concrete was designed using IS: 10262 (2009) having mixed proportions of 1:1.82:3.35:0.45. The test specimens were cured for 1, 3, 7 and 28 days. The cylinders were tested on 200 t compression testing machine and the beams were tested on 100 t universal testing machine. The results showed that the split tensile strength and flexural strength of standard concrete M30 by addition of steel fibers with an aspect ratio of 50 gave better results compared to 40 and 60 aspect ratios.

Description

Concrete which contains hydraulic cement, water, fine and coarse aggregate and discontinuous fibers is called Fiber Reinforced Concrete (FRC). FRC is a two-phase composite, in which cement-based matrix is reinforced with ordered or random distribution of fibers. One of the most widely used fibers in concrete is steel fibers. Steel fibers are obtained by cutting drawn wires. They are also available in different shapes like hook-end and crimped.