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The Effect of SCMs in Blended Cements on Sorption Characteristics of Superabsorbent Polymers

Supplementary cementitious materials (SCMs), such as fly ash (FA) and ground granulated blast-furnace slag (GGBS), are often used as a partial replacement of cements to improve the sustainability of Portland cement-based materials and reduce their environmental impact. Superabsorbent polymers (SAPs)...

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Autores principales: Rostami, Rohollah, Klemm, Agnieszka J., Almeida, Fernando C. R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8036596/
https://www.ncbi.nlm.nih.gov/pubmed/33806131
http://dx.doi.org/10.3390/ma14071609
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author Rostami, Rohollah
Klemm, Agnieszka J.
Almeida, Fernando C. R.
author_facet Rostami, Rohollah
Klemm, Agnieszka J.
Almeida, Fernando C. R.
author_sort Rostami, Rohollah
collection PubMed
description Supplementary cementitious materials (SCMs), such as fly ash (FA) and ground granulated blast-furnace slag (GGBS), are often used as a partial replacement of cements to improve the sustainability of Portland cement-based materials and reduce their environmental impact. Superabsorbent polymers (SAPs) can be successfully used as internal curing agents in ultra-high performance cementitious materials by facilitating the hydration process and controlling the water supply in both fresh and hardened states. This paper intends to characterise the physical and chemical properties of SAPs and their sorption properties in different blended cement environments. The swelling capacity and kinetics of absorption of three superabsorbent polymers with different chemical compositions and grading were tested in different cement environments. Experimental results of their sorption performance in distinct solutions, including deionised water (DI), Portland cement (PC), and blended cements (PC-FA and PC-GGBS) and changes in pH of different solutions over time were investigated. The results showed that PC-FA solution had the lowest pH followed by PC-GGBS solution. Moreover, SAPs samples displayed the highest absorption capacities in PC-FA solutions, and the lowest swelling capacities were found in PC-GGBS solutions. Furthermore, SAP with smaller particle sizes had the greatest absorption capacity values in all solutions.
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spelling pubmed-80365962021-04-12 The Effect of SCMs in Blended Cements on Sorption Characteristics of Superabsorbent Polymers Rostami, Rohollah Klemm, Agnieszka J. Almeida, Fernando C. R. Materials (Basel) Article Supplementary cementitious materials (SCMs), such as fly ash (FA) and ground granulated blast-furnace slag (GGBS), are often used as a partial replacement of cements to improve the sustainability of Portland cement-based materials and reduce their environmental impact. Superabsorbent polymers (SAPs) can be successfully used as internal curing agents in ultra-high performance cementitious materials by facilitating the hydration process and controlling the water supply in both fresh and hardened states. This paper intends to characterise the physical and chemical properties of SAPs and their sorption properties in different blended cement environments. The swelling capacity and kinetics of absorption of three superabsorbent polymers with different chemical compositions and grading were tested in different cement environments. Experimental results of their sorption performance in distinct solutions, including deionised water (DI), Portland cement (PC), and blended cements (PC-FA and PC-GGBS) and changes in pH of different solutions over time were investigated. The results showed that PC-FA solution had the lowest pH followed by PC-GGBS solution. Moreover, SAPs samples displayed the highest absorption capacities in PC-FA solutions, and the lowest swelling capacities were found in PC-GGBS solutions. Furthermore, SAP with smaller particle sizes had the greatest absorption capacity values in all solutions. MDPI 2021-03-25 /pmc/articles/PMC8036596/ /pubmed/33806131 http://dx.doi.org/10.3390/ma14071609 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ).
spellingShingle Article
Rostami, Rohollah
Klemm, Agnieszka J.
Almeida, Fernando C. R.
The Effect of SCMs in Blended Cements on Sorption Characteristics of Superabsorbent Polymers
title The Effect of SCMs in Blended Cements on Sorption Characteristics of Superabsorbent Polymers
title_full The Effect of SCMs in Blended Cements on Sorption Characteristics of Superabsorbent Polymers
title_fullStr The Effect of SCMs in Blended Cements on Sorption Characteristics of Superabsorbent Polymers
title_full_unstemmed The Effect of SCMs in Blended Cements on Sorption Characteristics of Superabsorbent Polymers
title_short The Effect of SCMs in Blended Cements on Sorption Characteristics of Superabsorbent Polymers
title_sort effect of scms in blended cements on sorption characteristics of superabsorbent polymers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8036596/
https://www.ncbi.nlm.nih.gov/pubmed/33806131
http://dx.doi.org/10.3390/ma14071609
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