Strength, Carbonation Resistance, and Chloride-Ion Penetrability of Cement Mortars Containing Catechol-Functionalized Chitosan Polymer

There have been numerous recent studies on improving the mechanical properties and durability of cement composites by mixing them with functional polymers. However, research into applying modified biopolymer such as catechol-functionalized chitosan to cement mortar or concrete is rare to the best of...

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Autores principales:	Se-Jin Choi, Sung-Ho Bae, Jae-In Lee, Eun-Ji Bang, Haye-Min Ko
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	Cat-Chit polymer cement mortar compressive strength carbonation depth chloride-ion penetrability Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/10f228067a6f430c9d0ace409ef4178f
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spelling	oai:doaj.org-article:10f228067a6f430c9d0ace409ef4178f2021-11-11T17:58:27ZStrength, Carbonation Resistance, and Chloride-Ion Penetrability of Cement Mortars Containing Catechol-Functionalized Chitosan Polymer10.3390/ma142163951996-1944https://doaj.org/article/10f228067a6f430c9d0ace409ef4178f2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/21/6395https://doaj.org/toc/1996-1944There have been numerous recent studies on improving the mechanical properties and durability of cement composites by mixing them with functional polymers. However, research into applying modified biopolymer such as catechol-functionalized chitosan to cement mortar or concrete is rare to the best of our knowledge. In this study, catechol-functionalized chitosan (Cat-Chit), a well-known bioinspired polymer that imitates the basic structures and functions of living organisms and biological materials in nature, was synthesized and combined with cement mortar in various proportions. The compressive strength, tensile strength, drying shrinkage, accelerated carbonation depth, and chloride-ion penetrability of these mixes were then evaluated. In the ultraviolet–visible spectra, a maximum absorption peak appeared at 280 nm, corresponding to catechol conjugation. The sample containing 7.5% Cat-Chit polymer in water (CPW) exhibited the highest compressive strength, and its 28-day compressive strength was ~20.2% higher than that of a control sample with no added polymer. The tensile strength of the samples containing 5% or more CPW was ~2.3–11.5% higher than that of the control sample. Additionally, all the Cat-Chit polymer mixtures exhibited lower carbonation depths than compared to the control sample. The total charge passing through the samples decreased as the amount of CPW increased. Thus, incorporating this polymer effectively improved the mechanical properties, carbonation resistance, and chloride-ion penetration resistance of cement mortar.Se-Jin ChoiSung-Ho BaeJae-In LeeEun-Ji BangHaye-Min KoMDPI AGarticleCat-Chit polymercement mortarcompressive strengthcarbonation depthchloride-ion penetrabilityTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6395, p 6395 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Cat-Chit polymer cement mortar compressive strength carbonation depth chloride-ion penetrability Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	Cat-Chit polymer cement mortar compressive strength carbonation depth chloride-ion penetrability Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Se-Jin Choi Sung-Ho Bae Jae-In Lee Eun-Ji Bang Haye-Min Ko Strength, Carbonation Resistance, and Chloride-Ion Penetrability of Cement Mortars Containing Catechol-Functionalized Chitosan Polymer
description	There have been numerous recent studies on improving the mechanical properties and durability of cement composites by mixing them with functional polymers. However, research into applying modified biopolymer such as catechol-functionalized chitosan to cement mortar or concrete is rare to the best of our knowledge. In this study, catechol-functionalized chitosan (Cat-Chit), a well-known bioinspired polymer that imitates the basic structures and functions of living organisms and biological materials in nature, was synthesized and combined with cement mortar in various proportions. The compressive strength, tensile strength, drying shrinkage, accelerated carbonation depth, and chloride-ion penetrability of these mixes were then evaluated. In the ultraviolet–visible spectra, a maximum absorption peak appeared at 280 nm, corresponding to catechol conjugation. The sample containing 7.5% Cat-Chit polymer in water (CPW) exhibited the highest compressive strength, and its 28-day compressive strength was ~20.2% higher than that of a control sample with no added polymer. The tensile strength of the samples containing 5% or more CPW was ~2.3–11.5% higher than that of the control sample. Additionally, all the Cat-Chit polymer mixtures exhibited lower carbonation depths than compared to the control sample. The total charge passing through the samples decreased as the amount of CPW increased. Thus, incorporating this polymer effectively improved the mechanical properties, carbonation resistance, and chloride-ion penetration resistance of cement mortar.
format	article
author	Se-Jin Choi Sung-Ho Bae Jae-In Lee Eun-Ji Bang Haye-Min Ko
author_facet	Se-Jin Choi Sung-Ho Bae Jae-In Lee Eun-Ji Bang Haye-Min Ko
author_sort	Se-Jin Choi
title	Strength, Carbonation Resistance, and Chloride-Ion Penetrability of Cement Mortars Containing Catechol-Functionalized Chitosan Polymer
title_short	Strength, Carbonation Resistance, and Chloride-Ion Penetrability of Cement Mortars Containing Catechol-Functionalized Chitosan Polymer
title_full	Strength, Carbonation Resistance, and Chloride-Ion Penetrability of Cement Mortars Containing Catechol-Functionalized Chitosan Polymer
title_fullStr	Strength, Carbonation Resistance, and Chloride-Ion Penetrability of Cement Mortars Containing Catechol-Functionalized Chitosan Polymer
title_full_unstemmed	Strength, Carbonation Resistance, and Chloride-Ion Penetrability of Cement Mortars Containing Catechol-Functionalized Chitosan Polymer
title_sort	strength, carbonation resistance, and chloride-ion penetrability of cement mortars containing catechol-functionalized chitosan polymer
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/10f228067a6f430c9d0ace409ef4178f
work_keys_str_mv	AT sejinchoi strengthcarbonationresistanceandchlorideionpenetrabilityofcementmortarscontainingcatecholfunctionalizedchitosanpolymer AT sunghobae strengthcarbonationresistanceandchlorideionpenetrabilityofcementmortarscontainingcatecholfunctionalizedchitosanpolymer AT jaeinlee strengthcarbonationresistanceandchlorideionpenetrabilityofcementmortarscontainingcatecholfunctionalizedchitosanpolymer AT eunjibang strengthcarbonationresistanceandchlorideionpenetrabilityofcementmortarscontainingcatecholfunctionalizedchitosanpolymer AT hayeminko strengthcarbonationresistanceandchlorideionpenetrabilityofcementmortarscontainingcatecholfunctionalizedchitosanpolymer
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Strength, Carbonation Resistance, and Chloride-Ion Penetrability of Cement Mortars Containing Catechol-Functionalized Chitosan Polymer

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