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Influence of Coarse Aggregates and Silica Fume on the Mechanical Properties, Durability, and Microstructure of Concrete

Globally, concrete is the most widely used construction material. The composition of concrete plays an important role in controlling its overall performance. Concrete is composed of approximately 70%–80% aggregates, by volume. Therefore, it is mandatory to investigate the effect of aggregates on the...

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Autores principales: Kim, Seong Soo, Qudoos, Abdul, Jakhrani, Sadam Hussain, Lee, Jeong Bae, Kim, Hong Gi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6829464/
https://www.ncbi.nlm.nih.gov/pubmed/31614748
http://dx.doi.org/10.3390/ma12203324
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author Kim, Seong Soo
Qudoos, Abdul
Jakhrani, Sadam Hussain
Lee, Jeong Bae
Kim, Hong Gi
author_facet Kim, Seong Soo
Qudoos, Abdul
Jakhrani, Sadam Hussain
Lee, Jeong Bae
Kim, Hong Gi
author_sort Kim, Seong Soo
collection PubMed
description Globally, concrete is the most widely used construction material. The composition of concrete plays an important role in controlling its overall performance. Concrete is composed of approximately 70%–80% aggregates, by volume. Therefore, it is mandatory to investigate the effect of aggregates on the performance of concrete. For this purpose, this study investigated the effect of three different coarse aggregates on the mechanical properties, durability, and microstructure of concrete. Concrete specimens were made using aggregates obtained from three regions with different mineralogies. The specimens were also made by replacing cement with silica fume. The specimens were analyzed in terms of compressive, flexural, and splitting tensile strengths, chloride penetration, carbonation, mercury intrusion porosimetry, and scanning electron microscopy. The results demonstrate that the specimens made with rougher coarse aggregates and silica fume had enhanced performance in comparison to those made with smoother aggregates.
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spelling pubmed-68294642019-11-18 Influence of Coarse Aggregates and Silica Fume on the Mechanical Properties, Durability, and Microstructure of Concrete Kim, Seong Soo Qudoos, Abdul Jakhrani, Sadam Hussain Lee, Jeong Bae Kim, Hong Gi Materials (Basel) Article Globally, concrete is the most widely used construction material. The composition of concrete plays an important role in controlling its overall performance. Concrete is composed of approximately 70%–80% aggregates, by volume. Therefore, it is mandatory to investigate the effect of aggregates on the performance of concrete. For this purpose, this study investigated the effect of three different coarse aggregates on the mechanical properties, durability, and microstructure of concrete. Concrete specimens were made using aggregates obtained from three regions with different mineralogies. The specimens were also made by replacing cement with silica fume. The specimens were analyzed in terms of compressive, flexural, and splitting tensile strengths, chloride penetration, carbonation, mercury intrusion porosimetry, and scanning electron microscopy. The results demonstrate that the specimens made with rougher coarse aggregates and silica fume had enhanced performance in comparison to those made with smoother aggregates. MDPI 2019-10-12 /pmc/articles/PMC6829464/ /pubmed/31614748 http://dx.doi.org/10.3390/ma12203324 Text en © 2019 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
Kim, Seong Soo
Qudoos, Abdul
Jakhrani, Sadam Hussain
Lee, Jeong Bae
Kim, Hong Gi
Influence of Coarse Aggregates and Silica Fume on the Mechanical Properties, Durability, and Microstructure of Concrete
title Influence of Coarse Aggregates and Silica Fume on the Mechanical Properties, Durability, and Microstructure of Concrete
title_full Influence of Coarse Aggregates and Silica Fume on the Mechanical Properties, Durability, and Microstructure of Concrete
title_fullStr Influence of Coarse Aggregates and Silica Fume on the Mechanical Properties, Durability, and Microstructure of Concrete
title_full_unstemmed Influence of Coarse Aggregates and Silica Fume on the Mechanical Properties, Durability, and Microstructure of Concrete
title_short Influence of Coarse Aggregates and Silica Fume on the Mechanical Properties, Durability, and Microstructure of Concrete
title_sort influence of coarse aggregates and silica fume on the mechanical properties, durability, and microstructure of concrete
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6829464/
https://www.ncbi.nlm.nih.gov/pubmed/31614748
http://dx.doi.org/10.3390/ma12203324
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