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Modelling and optimization of the mechanical properties of engineered cementitious composite containing crumb rubber pretreated with graphene oxide using response surface methodology

One of the biggest obstacles to using crumb rubber (CR) in cementitious composites for structural applications is its adverse effects on mechanical strength. This is caused by the poor bonding between the CR and the hardened cement paste. The problem persists despite several CR pretreatment methods...

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Main Authors: Abdulkadir, I., Mohammed, B.S., Liew, M.S., Wahab, M.M.A.
Format: Article
Published: Elsevier Ltd 2021
Online Access:http://scholars.utp.edu.my/id/eprint/29581/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118724675&doi=10.1016%2fj.conbuildmat.2021.125259&partnerID=40&md5=bd30a7333f95b42e4858710b70caad06
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spelling oai:scholars.utp.edu.my:295812023-02-03T13:35:47Z http://scholars.utp.edu.my/id/eprint/29581/ Modelling and optimization of the mechanical properties of engineered cementitious composite containing crumb rubber pretreated with graphene oxide using response surface methodology Abdulkadir, I. Mohammed, B.S. Liew, M.S. Wahab, M.M.A. One of the biggest obstacles to using crumb rubber (CR) in cementitious composites for structural applications is its adverse effects on mechanical strength. This is caused by the poor bonding between the CR and the hardened cement paste. The problem persists despite several CR pretreatment methods proposed in different studies. This research aims to investigate a novel approach to CR pretreatment using graphene oxide (GO). The effect of GO concentration (GOC) and pretreated CR as a partial substitute to fine aggregate on the mechanical properties of ECC has been investigated. Using response surface methodology (RSM), 16 experimental runs having varying combinations and levels of GOC (0, 0.25, 0.5, 0.75, and 1.0 mg/ml) and CR replacement (1, 3, and 5 by volume) of fine aggregate as the independent variables have been tested for compressive, flexural, tensile strengths and strain capacity (CS, FS, TS, and TC) as the responses. Results show an increase in the mechanical strengths with higher GOC attributed to higher reactivity and better bonding at the CR and hardened cement matrix interface. At a 5 GO-CR replacement, there is a 50.3, 70.4, and 68.3 improvement in CS, FS, and TS between the control mix with 0 mg/ml GOC and the mix with 1.0 mg/ml GOC. Response surface models to predict the mechanical strengths have been developed and validated using ANOVA with R2 values ranging from 94.13 to 99.07 for all the models. Multi-objective optimization has been performed and experimentally validated, with the predicted and experimental results having<5 error. © 2021 Elsevier Ltd Elsevier Ltd 2021 Article NonPeerReviewed Abdulkadir, I. and Mohammed, B.S. and Liew, M.S. and Wahab, M.M.A. (2021) Modelling and optimization of the mechanical properties of engineered cementitious composite containing crumb rubber pretreated with graphene oxide using response surface methodology. Construction and Building Materials, 310. https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118724675&doi=10.1016%2fj.conbuildmat.2021.125259&partnerID=40&md5=bd30a7333f95b42e4858710b70caad06
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description One of the biggest obstacles to using crumb rubber (CR) in cementitious composites for structural applications is its adverse effects on mechanical strength. This is caused by the poor bonding between the CR and the hardened cement paste. The problem persists despite several CR pretreatment methods proposed in different studies. This research aims to investigate a novel approach to CR pretreatment using graphene oxide (GO). The effect of GO concentration (GOC) and pretreated CR as a partial substitute to fine aggregate on the mechanical properties of ECC has been investigated. Using response surface methodology (RSM), 16 experimental runs having varying combinations and levels of GOC (0, 0.25, 0.5, 0.75, and 1.0 mg/ml) and CR replacement (1, 3, and 5 by volume) of fine aggregate as the independent variables have been tested for compressive, flexural, tensile strengths and strain capacity (CS, FS, TS, and TC) as the responses. Results show an increase in the mechanical strengths with higher GOC attributed to higher reactivity and better bonding at the CR and hardened cement matrix interface. At a 5 GO-CR replacement, there is a 50.3, 70.4, and 68.3 improvement in CS, FS, and TS between the control mix with 0 mg/ml GOC and the mix with 1.0 mg/ml GOC. Response surface models to predict the mechanical strengths have been developed and validated using ANOVA with R2 values ranging from 94.13 to 99.07 for all the models. Multi-objective optimization has been performed and experimentally validated, with the predicted and experimental results having<5 error. © 2021 Elsevier Ltd
format Article
author Abdulkadir, I.
Mohammed, B.S.
Liew, M.S.
Wahab, M.M.A.
spellingShingle Abdulkadir, I.
Mohammed, B.S.
Liew, M.S.
Wahab, M.M.A.
Modelling and optimization of the mechanical properties of engineered cementitious composite containing crumb rubber pretreated with graphene oxide using response surface methodology
author_facet Abdulkadir, I.
Mohammed, B.S.
Liew, M.S.
Wahab, M.M.A.
author_sort Abdulkadir, I.
title Modelling and optimization of the mechanical properties of engineered cementitious composite containing crumb rubber pretreated with graphene oxide using response surface methodology
title_short Modelling and optimization of the mechanical properties of engineered cementitious composite containing crumb rubber pretreated with graphene oxide using response surface methodology
title_full Modelling and optimization of the mechanical properties of engineered cementitious composite containing crumb rubber pretreated with graphene oxide using response surface methodology
title_fullStr Modelling and optimization of the mechanical properties of engineered cementitious composite containing crumb rubber pretreated with graphene oxide using response surface methodology
title_full_unstemmed Modelling and optimization of the mechanical properties of engineered cementitious composite containing crumb rubber pretreated with graphene oxide using response surface methodology
title_sort modelling and optimization of the mechanical properties of engineered cementitious composite containing crumb rubber pretreated with graphene oxide using response surface methodology
publisher Elsevier Ltd
publishDate 2021
url http://scholars.utp.edu.my/id/eprint/29581/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85118724675&doi=10.1016%2fj.conbuildmat.2021.125259&partnerID=40&md5=bd30a7333f95b42e4858710b70caad06
_version_ 1758580615136935936
score 13.222552

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