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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Published inMaterials Vol. 12; no. 20; p. 3324
Main Authors Kim, Seong Soo, Qudoos, Abdul, Jakhrani, Sadam Hussain, Lee, Jeong Bae, Kim, Hong Gi
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 12.10.2019
MDPI
Subjects
Aggregates
Anolytes
Cement
Chloride
Concrete mixing
Corrosion resistance
Durability
Mechanical properties
Microstructure
Penetration depth
Quality
Silica fume
Silicon dioxide
Steady state
Stone
Studies
Sulfate resistance
Tensile strength
Velocity
Water absorption
South Korea
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Abstract 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.
AbstractList [...]durability-related properties like sulfate and freeze–thaw resistance and electrical resistivity were improved, while sorptivity, water absorption, and chloride penetration were reduced due to the addition of silica fume [4,5]. Aggregates occupy approximately 70% of the total volume of concrete. [...]the properties of aggregates play an important role in the overall performance of cementitious composites [7]. [...]it is mandatory to investigate the influence of different types of aggregates on the mechanical properties, durability, and microstructure of concrete. The non-steady-state migration coefficients of the specimens were calculated using the equation Dnssm=0.0239(273+T)L(U−2)t(xd−0.0238(273+T)LxdU−2), where Dnssm—non-steady-state migration coefficient, ×10−12 m2/s; U—absolute value of the applied voltage, V; T—average value of the initial and final temperatures in the anolyte solution, °C; L—thickness of the specimen, mm; xd —average penetration depth, mm; t—test duration, h. 2.3.4.
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.
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.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.
Author Kim, Hong Gi
Kim, Seong Soo
Lee, Jeong Bae
Qudoos, Abdul
Jakhrani, Sadam Hussain
AuthorAffiliation 1 Department of Civil Engineering, Daejin University, Pocheon-si 11159, Korea; sskim@daejin.ac.kr
2 Civil Engineering Department, Balochistan University of Engineering and Technology, Khuzdar 89100, Pakistan; qudoos.engnr@gmail.com
3 Department of Civil and Environmental Engineering, Hanyang University, Seoul 04763, Korea; sadamhussain@hanyang.ac.kr
4 GFC R&D CO., Ltd., Pocheon-si 11159, Korea; dlwjdqo@nate.com
AuthorAffiliation_xml – name: 2 Civil Engineering Department, Balochistan University of Engineering and Technology, Khuzdar 89100, Pakistan; qudoos.engnr@gmail.com
– name: 1 Department of Civil Engineering, Daejin University, Pocheon-si 11159, Korea; sskim@daejin.ac.kr
– name: 4 GFC R&D CO., Ltd., Pocheon-si 11159, Korea; dlwjdqo@nate.com
– name: 3 Department of Civil and Environmental Engineering, Hanyang University, Seoul 04763, Korea; sadamhussain@hanyang.ac.kr
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Snippet Globally, concrete is the most widely used construction material. The composition of concrete plays an important role in controlling its overall performance....
[...]durability-related properties like sulfate and freeze–thaw resistance and electrical resistivity were improved, while sorptivity, water absorption, and...
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SubjectTerms Aggregates
Anolytes
Cement
Chloride
Concrete mixing
Corrosion resistance
Durability
Mechanical properties
Microstructure
Penetration depth
Quality
Silica fume
Silicon dioxide
Steady state
Stone
Studies
Sulfate resistance
Tensile strength
Velocity
Water absorption
Title Influence of Coarse Aggregates and Silica Fume on the Mechanical Properties, Durability, and Microstructure of Concrete
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