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A Systematic Study on Polymer-Modified Alkali-Activated Slag–Part II: From Hydration to Mechanical Properties

The effect of styrene-acrylate (SA) polymer latex on alkali-activated slag (AAS) was systematically studied in the aspects of hydration, hydration products, pore structure and mechanical properties through the combined analytical techniques including calorimetry, X-ray diffraction, thermogravimetric...

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Autores principales: Lu, Zichen, Merkl, Jan-Philip, Pulkin, Maxim, Firdous, Rafia, Wache, Steffen, Stephan, Dietmar
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7435948/
https://www.ncbi.nlm.nih.gov/pubmed/32756389
http://dx.doi.org/10.3390/ma13153418
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author Lu, Zichen
Merkl, Jan-Philip
Pulkin, Maxim
Firdous, Rafia
Wache, Steffen
Stephan, Dietmar
author_facet Lu, Zichen
Merkl, Jan-Philip
Pulkin, Maxim
Firdous, Rafia
Wache, Steffen
Stephan, Dietmar
author_sort Lu, Zichen
collection PubMed
description The effect of styrene-acrylate (SA) polymer latex on alkali-activated slag (AAS) was systematically studied in the aspects of hydration, hydration products, pore structure and mechanical properties through the combined analytical techniques including calorimetry, X-ray diffraction, thermogravimetric analysis, mercury intrusion porosimetry, and mechanical measurement. It was found that the addition of SA does not retard the AAS hydration, but slightly accelerates it, possibly due to the increasing ion diffusion through the loosely structured hydration products. Pore structure analysis indicates that the addition of polymer increases the cumulative pore volume and the portion of pores with size >100 nm in the hardened AAS paste. The addition of SA latex results in a continuous decrease of the compressive strength, but the flexural strength firstly increases and then decreases with the increase of polymer dosage. The polymer dosage of 2.5 wt % is optimal when applying polymer latex in the AAS system in this study.
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spelling pubmed-74359482020-08-24 A Systematic Study on Polymer-Modified Alkali-Activated Slag–Part II: From Hydration to Mechanical Properties Lu, Zichen Merkl, Jan-Philip Pulkin, Maxim Firdous, Rafia Wache, Steffen Stephan, Dietmar Materials (Basel) Article The effect of styrene-acrylate (SA) polymer latex on alkali-activated slag (AAS) was systematically studied in the aspects of hydration, hydration products, pore structure and mechanical properties through the combined analytical techniques including calorimetry, X-ray diffraction, thermogravimetric analysis, mercury intrusion porosimetry, and mechanical measurement. It was found that the addition of SA does not retard the AAS hydration, but slightly accelerates it, possibly due to the increasing ion diffusion through the loosely structured hydration products. Pore structure analysis indicates that the addition of polymer increases the cumulative pore volume and the portion of pores with size >100 nm in the hardened AAS paste. The addition of SA latex results in a continuous decrease of the compressive strength, but the flexural strength firstly increases and then decreases with the increase of polymer dosage. The polymer dosage of 2.5 wt % is optimal when applying polymer latex in the AAS system in this study. MDPI 2020-08-03 /pmc/articles/PMC7435948/ /pubmed/32756389 http://dx.doi.org/10.3390/ma13153418 Text en © 2020 by the authors. 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/).
spellingShingle Article
Lu, Zichen
Merkl, Jan-Philip
Pulkin, Maxim
Firdous, Rafia
Wache, Steffen
Stephan, Dietmar
A Systematic Study on Polymer-Modified Alkali-Activated Slag–Part II: From Hydration to Mechanical Properties
title A Systematic Study on Polymer-Modified Alkali-Activated Slag–Part II: From Hydration to Mechanical Properties
title_full A Systematic Study on Polymer-Modified Alkali-Activated Slag–Part II: From Hydration to Mechanical Properties
title_fullStr A Systematic Study on Polymer-Modified Alkali-Activated Slag–Part II: From Hydration to Mechanical Properties
title_full_unstemmed A Systematic Study on Polymer-Modified Alkali-Activated Slag–Part II: From Hydration to Mechanical Properties
title_short A Systematic Study on Polymer-Modified Alkali-Activated Slag–Part II: From Hydration to Mechanical Properties
title_sort systematic study on polymer-modified alkali-activated slag–part ii: from hydration to mechanical properties
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7435948/
https://www.ncbi.nlm.nih.gov/pubmed/32756389
http://dx.doi.org/10.3390/ma13153418
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