The influence of rubber crumbs on the critical state behavior of waste mixtures

The practical application of waste materials such as steel furnace slag (SFS) and coal wash (CW) is becoming more prevalent in many geotechnical projects. It was found that the inclusion of rubber crumbs (RCs) from recycled tyres into mixtures of SFS and CW not only solves the problem of large stock...

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Main Authors: Indraratna Buddhima, Qi Yujie, Heitor Ana, Vinod Jayan S.
Format: Article
Language:English
Published: EDP Sciences 2019-01-01
Series:E3S Web of Conferences
Online Access:https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/18/e3sconf_isg2019_06004.pdf
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spelling doaj-fde8810b65bb4b52896bccc446c112822021-02-02T00:46:25ZengEDP SciencesE3S Web of Conferences2267-12422019-01-01920600410.1051/e3sconf/20199206004e3sconf_isg2019_06004The influence of rubber crumbs on the critical state behavior of waste mixturesIndraratna BuddhimaQi YujieHeitor AnaVinod Jayan S.The practical application of waste materials such as steel furnace slag (SFS) and coal wash (CW) is becoming more prevalent in many geotechnical projects. It was found that the inclusion of rubber crumbs (RCs) from recycled tyres into mixtures of SFS and CW not only solves the problem of large stockpiles of waste tyres, it also can provide an energy-absorbing medium that will reduce track degradation. In order to investigate the influence of RC on the geotechnical properties of the granular waste matrix (SFS+CW+RC), a series of monotonic consolidated drained triaxial tests were conducted on waste mixtures. The test results reveal that the inclusion of RC significantly affects the geotechnical properties of the waste mixtures, especially their critical state behaviour. Specifically, the waste matrix can achieve a critical state with a low RC content (<20%), whereas those mixtures with higher RC contents (20-40%) cannot attain a critical state within the ultimate strain capacity that can be applied to specimens using the traditional triaxial equipment. Therefore, for the waste matrix with higher RC contents extrapolation of the measured volumetric strains had to be adopted to obtain the appropriate critical state parameters. Moreover, the influence of energy absorbing property by adding RC on the critical state behaviour has also been captured through an empirical equation.https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/18/e3sconf_isg2019_06004.pdf
collection DOAJ
language English
format Article
sources DOAJ
author Indraratna Buddhima
Qi Yujie
Heitor Ana
Vinod Jayan S.
spellingShingle Indraratna Buddhima
Qi Yujie
Heitor Ana
Vinod Jayan S.
The influence of rubber crumbs on the critical state behavior of waste mixtures
E3S Web of Conferences
author_facet Indraratna Buddhima
Qi Yujie
Heitor Ana
Vinod Jayan S.
author_sort Indraratna Buddhima
title The influence of rubber crumbs on the critical state behavior of waste mixtures
title_short The influence of rubber crumbs on the critical state behavior of waste mixtures
title_full The influence of rubber crumbs on the critical state behavior of waste mixtures
title_fullStr The influence of rubber crumbs on the critical state behavior of waste mixtures
title_full_unstemmed The influence of rubber crumbs on the critical state behavior of waste mixtures
title_sort influence of rubber crumbs on the critical state behavior of waste mixtures
publisher EDP Sciences
series E3S Web of Conferences
issn 2267-1242
publishDate 2019-01-01
description The practical application of waste materials such as steel furnace slag (SFS) and coal wash (CW) is becoming more prevalent in many geotechnical projects. It was found that the inclusion of rubber crumbs (RCs) from recycled tyres into mixtures of SFS and CW not only solves the problem of large stockpiles of waste tyres, it also can provide an energy-absorbing medium that will reduce track degradation. In order to investigate the influence of RC on the geotechnical properties of the granular waste matrix (SFS+CW+RC), a series of monotonic consolidated drained triaxial tests were conducted on waste mixtures. The test results reveal that the inclusion of RC significantly affects the geotechnical properties of the waste mixtures, especially their critical state behaviour. Specifically, the waste matrix can achieve a critical state with a low RC content (<20%), whereas those mixtures with higher RC contents (20-40%) cannot attain a critical state within the ultimate strain capacity that can be applied to specimens using the traditional triaxial equipment. Therefore, for the waste matrix with higher RC contents extrapolation of the measured volumetric strains had to be adopted to obtain the appropriate critical state parameters. Moreover, the influence of energy absorbing property by adding RC on the critical state behaviour has also been captured through an empirical equation.
url https://www.e3s-conferences.org/articles/e3sconf/pdf/2019/18/e3sconf_isg2019_06004.pdf
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