Influence of Fibre Aspect Ratio and Volume Fraction of Steel Fibres on Hardened Properties of Normal Grade Concrete

Author(s): M.V.S.S.Sastri, K.Jagannadha Rao and V.Bhikshma
Paper category: Proceeding
Book title: International Conference on Advances in Civil Engineering and Sustainable Construction
Editor(s): T.Ch. Madhavi, G. Prabhakar, Santhosh Ram, and P.M. Rameshwaran
Print-ISBN: None
e-ISBN: 978-2-35158-161-2
Publisher: RILEM Publications SARL
Publication year: 2016
Pages: 79-81
Total Pages : 3
Language : English

Abstract: Steel Fibre Reinforced Concrete (SFRC) has become very effective composite material in which metallic fibres are introduced in the matrix so as to improve mechanical properties of concrete and a lot of research was carried out on SFRC in the last five decades. Until now many different types of steel fibres for application in SFRC have been developed, varying in geometry (length, diameter), fibre shape (straight or deformed fibres, fibres with or without end hooks) and surface properties (smooth, rough or deformed) which caused a large variety of commercial steel fibres, complicating the selection of optimal fibre for a specific construction task. For this reason the present paper focuses on the influence of steel fibre shapes, volume fraction and aspect ratio on mechanical properties like Compressive Strength, Split Tensile Strength and Flexural Strength of normal grade concrete. Three fibre shapes of straight, corrugated and straight with hooked ends, four aspect ratios of 40, 50, 60 and 75and four volume fractions of fibres varying from 0.5 to 1.25 have been used. The efficiency of the different steel fibres was evaluated on the basis of the full factorial approach. By summarising the test results the paper gives a support for the choice of the suitable steel fibre shape, volume fraction and aspect ratio to obtain optimum properties of SFRC in concordance to the requirements further work on SFRC.

Online publication: 2017
Publication type: full_text
Public price (Euros): 0.00