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

Department of Civil Engineering, Daejin University, Pocheon-si 11159, Korea
Civil Engineering Department, Balochistan University of Engineering and Technology, Khuzdar 89100, Pakistan
Department of Civil and Environmental Engineering, Hanyang University, Seoul 04763, Korea
GFC R&D CO., Ltd., Pocheon-si 11159, Korea
Author to whom correspondence should be addressed.
Materials 2019, 12(20), 3324; (registering DOI)
Received: 5 September 2019 / Revised: 4 October 2019 / Accepted: 9 October 2019 / Published: 12 October 2019
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. View Full-Text
Keywords: concrete; aggregates; mechanical properties; durability concrete; aggregates; mechanical properties; durability
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Kim, S.S.; Qudoos, A.; Jakhrani, S.H.; Lee, J.B.; Kim, H.G. Influence of Coarse Aggregates and Silica Fume on the Mechanical Properties, Durability, and Microstructure of Concrete. Materials 2019, 12, 3324.

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