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Durability Behaviours of Engineered Cementitious Composites Blended with Carbon Nanotubes against Sulphate and Acid Attacks by Applying RSM Modelling and Optimization

Chemical deterioration, including sulphate and acid attacks, is a major issue affecting the long-term durability of engineered cementitious composite (ECC) constructions that contact water from various sources, including groundwater, seawater, sewer water, and drinking water. This research enhances...

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Main Authors: Bheel, N., Mohammed, B.S., Liew, M.S., Zawawi, N.A.W.A.
Format: Article
Published: Multidisciplinary Digital Publishing Institute (MDPI) 2023
Online Access:http://scholars.utp.edu.my/id/eprint/37425/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85169128523&doi=10.3390%2fbuildings13082032&partnerID=40&md5=eefbe409b5c51c5ac19ba64f48b80343
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spelling oai:scholars.utp.edu.my:374252023-10-04T12:43:47Z http://scholars.utp.edu.my/id/eprint/37425/ Durability Behaviours of Engineered Cementitious Composites Blended with Carbon Nanotubes against Sulphate and Acid Attacks by Applying RSM Modelling and Optimization Bheel, N. Mohammed, B.S. Liew, M.S. Zawawi, N.A.W.A. Chemical deterioration, including sulphate and acid attacks, is a major issue affecting the long-term durability of engineered cementitious composite (ECC) constructions that contact water from various sources, including groundwater, seawater, sewer water, and drinking water. This research enhances ECCs� strength and resilience against chemical attack by combining cementitious composites with multiwalled carbon nanotubes (CNTs) and polyvinyl alcohol (PVA) fibre volume fractions using multiobjective optimization. The central composite design (CCD) of RSM was applied to generate thirteen mixes of different potential combinations of factors (multiwalled CNTs: 0.05 to 0.08, PVA: 1�2) and eight outcome responses were studied, although eight response models�six quadratic and two linear�were successfully designed and assessed using analysis of variance. The coefficients associated with R2 for all the models were exceptionally high, with values varying from 84 to 99 percent. The multiobjective optimization predicted the best outcomes and developed optimal values for both variables (CNTs: 0.05 and PVA: 1). The results showed that, at 0.05 of CNTs in ECCs, an ultimate improvement of 23 in compressive strength was seen. Additionally, when CNTs are used to grow in the ECC matrix, the expansion owing to sulphate resistance and length change due to acid attack are both reduced. In addition, when the percentage of CNTs increases in ECCs, the weight loss and pH value owing to acid attack, as well as the rate of chloride permeability test results, are reduced. Furthermore, CNTs and PVA fibres with 0.05 and 1�1.5 concentrations offer optimal construction sector outcomes. © 2023 by the authors. Multidisciplinary Digital Publishing Institute (MDPI) 2023 Article NonPeerReviewed Bheel, N. and Mohammed, B.S. and Liew, M.S. and Zawawi, N.A.W.A. (2023) Durability Behaviours of Engineered Cementitious Composites Blended with Carbon Nanotubes against Sulphate and Acid Attacks by Applying RSM Modelling and Optimization. Buildings, 13 (8). ISSN 20755309 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85169128523&doi=10.3390%2fbuildings13082032&partnerID=40&md5=eefbe409b5c51c5ac19ba64f48b80343 10.3390/buildings13082032 10.3390/buildings13082032 10.3390/buildings13082032
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 Chemical deterioration, including sulphate and acid attacks, is a major issue affecting the long-term durability of engineered cementitious composite (ECC) constructions that contact water from various sources, including groundwater, seawater, sewer water, and drinking water. This research enhances ECCs� strength and resilience against chemical attack by combining cementitious composites with multiwalled carbon nanotubes (CNTs) and polyvinyl alcohol (PVA) fibre volume fractions using multiobjective optimization. The central composite design (CCD) of RSM was applied to generate thirteen mixes of different potential combinations of factors (multiwalled CNTs: 0.05 to 0.08, PVA: 1�2) and eight outcome responses were studied, although eight response models�six quadratic and two linear�were successfully designed and assessed using analysis of variance. The coefficients associated with R2 for all the models were exceptionally high, with values varying from 84 to 99 percent. The multiobjective optimization predicted the best outcomes and developed optimal values for both variables (CNTs: 0.05 and PVA: 1). The results showed that, at 0.05 of CNTs in ECCs, an ultimate improvement of 23 in compressive strength was seen. Additionally, when CNTs are used to grow in the ECC matrix, the expansion owing to sulphate resistance and length change due to acid attack are both reduced. In addition, when the percentage of CNTs increases in ECCs, the weight loss and pH value owing to acid attack, as well as the rate of chloride permeability test results, are reduced. Furthermore, CNTs and PVA fibres with 0.05 and 1�1.5 concentrations offer optimal construction sector outcomes. © 2023 by the authors.
format Article
author Bheel, N.
Mohammed, B.S.
Liew, M.S.
Zawawi, N.A.W.A.
spellingShingle Bheel, N.
Mohammed, B.S.
Liew, M.S.
Zawawi, N.A.W.A.
Durability Behaviours of Engineered Cementitious Composites Blended with Carbon Nanotubes against Sulphate and Acid Attacks by Applying RSM Modelling and Optimization
author_facet Bheel, N.
Mohammed, B.S.
Liew, M.S.
Zawawi, N.A.W.A.
author_sort Bheel, N.
title Durability Behaviours of Engineered Cementitious Composites Blended with Carbon Nanotubes against Sulphate and Acid Attacks by Applying RSM Modelling and Optimization
title_short Durability Behaviours of Engineered Cementitious Composites Blended with Carbon Nanotubes against Sulphate and Acid Attacks by Applying RSM Modelling and Optimization
title_full Durability Behaviours of Engineered Cementitious Composites Blended with Carbon Nanotubes against Sulphate and Acid Attacks by Applying RSM Modelling and Optimization
title_fullStr Durability Behaviours of Engineered Cementitious Composites Blended with Carbon Nanotubes against Sulphate and Acid Attacks by Applying RSM Modelling and Optimization
title_full_unstemmed Durability Behaviours of Engineered Cementitious Composites Blended with Carbon Nanotubes against Sulphate and Acid Attacks by Applying RSM Modelling and Optimization
title_sort durability behaviours of engineered cementitious composites blended with carbon nanotubes against sulphate and acid attacks by applying rsm modelling and optimization
publisher Multidisciplinary Digital Publishing Institute (MDPI)
publishDate 2023
url http://scholars.utp.edu.my/id/eprint/37425/
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85169128523&doi=10.3390%2fbuildings13082032&partnerID=40&md5=eefbe409b5c51c5ac19ba64f48b80343
_version_ 1779441381060640768
score 13.222552

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