Mechanical Properties and Modeling of Amorphous Metallic Fiber-Reinforced Concrete in Compression

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Title: Mechanical Properties and Modeling of Amorphous Metallic Fiber-Reinforced Concrete in Compression

Author(s): Ngoc-Hieu Dinh, Kyoung-Kyu Choi, and Hee-Seung Kim

Publication: IJCSM

Volume: 10

Issue: 2

Appears on pages(s): 221–236

Keywords: compressive strength, amorphous metallic fibers, fiber-reinforced concrete, Poisson’s ratio, strain at peak stress, modulus of elasticity, stress–strain curve.

Date: 6/30/2016

Abstract:
The aim of this paper is to investigate the compressive behavior and characteristics of amorphous metallic fiberreinforcedconcrete (AMFRC). Compressive tests were carried out for two primary parameters: fiber volume fractions (Vf) of 0,0.3, 0.6 and 0.8 %; and design compressive strengths of 27, 35, and 50 MPa at the age of 28 days. Test results indicated that theaddition of amorphous metallic fibers in concrete mixture enhances the toughness, strain corresponding to peak stress, andPoisson’s ratio at high stress level, while the compressive strength at the 28-th day is less affected and the modulus of elasticity isreduced. Based on the experimental results, prediction equations were proposed for the modulus of elasticity and strain at peakstress as functions of fiber volume fraction and concrete compressive strength. In addition, an analytical model representing theentire stress–strain relationship of AMFRC in compression was proposed and validated with test results for each concrete mix. Thecomparison showed that the proposed modeling approach can properly simulate the entire stress–strain relationship of AMFRC aswell as the primary mechanical properties in compression including the modulus of elasticity and strain at peak stress.


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