Title:
Synergy in Toughness by Incorporating Amorphous Metal and Steel Fibers
Author(s):
Sunitha K. Nayar and Ravindra Gettu
Publication:
Materials Journal
Volume:
112
Issue:
6
Appears on pages(s):
821-827
Keywords:
amorphous metal; fiber-reinforced concrete; flexural behavior; steel fibers; toughness
DOI:
10.14359/51687857
Date:
11/1/2015
Abstract:
A study on the use of amorphous metallic fibers (AMFs) in concrete was undertaken to combine its action with that of hooked-ended steel fibers for improving flexural strength and toughness. Tests on mixtures with various dosages of AMF (10, 20, and 30 kg/m3 [16.9, 33.7, and 50.6 lb/yd3]), and 15 kg/m3 (25.3 lb/yd3) of steel fibers were carried out, along with hybrid mixtures with two dosages of AMF. The results showed a significant increase in the flexural strength of concrete with the addition of AMF, even at low dosages. The performance of concretes with the hybrid combinations is significantly enhanced. For example, the equivalent flexural strength for the concretes with just 10 kg/m3 (16.9 lb/yd3) of AMF and 15 kg/m3 (25.3 lb/yd3) of steel fibers is 35% higher than with only steel fibers and is approximately 3.5 times that obtained with only 10 kg/m3 (16.9 lb/yd3) of AMF. The load-deflection behavior and the toughness parameters clearly indicate a significant synergy in the hybrid combination.
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