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Influence of Different Fibre Types on the Rheology of Strain Hardening Cementitious Composites Read chapter Read first chapter

2021 | OriginalPaper | Chapter

A Constitutive Model for Steel-Fibre-Reinforced Lightweight Concrete

Authors : Hasanain K. Al-Naimi, Ali A. Abbas

Published in: Fibre Reinforced Concrete: Improvements and Innovations

Publisher: Springer International Publishing

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Abstract

A method is proposed to derive and validate material properties for lightweight fibrous concrete using experimental and numerical data. The coarse lightweight material tested (produced by LYTAG) is recycled and offers an alternative to gravel and quarry resources which are at risk of depletion in future. Also, this material can lead to reduction in the mass of the structure which results in economical designs. However, in comparison to normal weight aggregate concrete (NWAC), lightweight aggregate concrete (LWAC) tends to be more brittle as it typically shears through the aggregates leading to instantaneous drop in peak load in both compression and tension tests. Hence, to address this brittleness for LWAC, modern hooked-end DRAMIX fibres with different geometry (hooks), dosages (Vf) and bond strengths (τb) are added to mixes with different strengths (fck). This paper focuses on both tensile properties using a direct pullout and indirect notched beam tests, and compressive properties (fck, E, μ) using the conventional compression test for cylinders of plain and steel-fibre reinforced lightweight concrete (SFRLC). A tensile semi-empirical multilinear σ-ω relation was derived besides compressive σ-ε and validated against available steel fibre reinforced concrete (SFRC) constitutive models for the tested fibrous notched beams using ABAQUS.

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Metadata
Title
A Constitutive Model for Steel-Fibre-Reinforced Lightweight Concrete
Authors
Hasanain K. Al-Naimi
Ali A. Abbas
Copyright Year
2021
Book
Fibre Reinforced Concrete: Improvements and Innovations

Print ISBN: 978-3-030-58481-8

Electronic ISBN: 978-3-030-58482-5

Copyright Year: 2021

DOI
https://doi.org/10.1007/978-3-030-58482-5_81