Properties on the Freeze-Thaw of Concrete Subjected to Seawater Attack

박광필,; 김성수,; 이승태,; 김종필,; ), 정호섭 ( Jung Ho Seop

doi:10.4334/jkci.2011.23.1.023

Cited by 7 publications

(3 citation statements)

References 6 publications

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“…On the contrary, WS40 concrete exhibited the smallest spacing factor despite its relatively low air content. On the contrary, a very dense microstructure and a few microcracks were observed near the ITZ for the WS40 concrete, confirming the generation of C-S-H in large quantities [8,32]. Fewer cracks and a denser ITZ were observed in WS30AS10 concrete.…”

Section: Discussionmentioning

confidence: 60%

“…2021, 11, 7291 11 of 13 concrete subjected to freeze-thaw cycles had relatively less dense microstructures containing many micropores and microcracks, and very wide cracks (~1 µm) were observed near the ITZ, confirming that relatively high damages occurred due to freeze-thaw cycles. On the contrary, a very dense microstructure and a few microcracks were observed near the ITZ for the WS40 concrete, confirming the generation of C-S-H in large quantities [8,32]. Fewer cracks and a denser ITZ were observed in WS30AS10 concrete.…”

Section: Microstructure Studies By Semmentioning

confidence: 60%

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Effect of Freeze–Thaw Cycles on the Performance of Concrete Containing Water-Cooled and Air-Cooled Slag

et al. 2021

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An experimental study on the resistance of concrete containing air-cooled slag (AS) and water-cooled slag (WS) against freeze–thaw cycles was conducted. For comparison, the durability of ASTM Type I ordinary Portland cement (OPC) concrete exposed to the same freeze–thaw environment was examined. To evaluate the durability of concrete exposed to the freeze–thaw environment, an experiment was conducted according to ASTM C 666 procedure A. Furthermore, the relative dynamic modulus of elasticity, surface electrical resistivity, and compressive strength of concrete specimens were measured after exposing them to freeze–thaw cycles for a predetermined period, and the results were compared with those of OPC concrete. The relationship between the freeze and thaw resistances of concrete and the air-void system (spacing factor and specific surface area) was identified. Furthermore, the microstructure of concrete exposed to freeze–thaw cycles was observed using scanning electron microscopy to identify the interfacial transition zone, cracks, and micropores. Experimental results showed that the resistance of blended cement concrete containing WS and AS against freeze–thaw cycles was significantly higher than that of OPC concrete. The concrete in which 10% of OPC was replaced by AS exhibited a similar durability as that of the concrete in which 40% of OPC was replaced only by WS. Therefore, it is expected that blended cement concrete containing WS and AS based on an appropriate mix proportion design will exhibit excellent durability in regions experiencing freezing temperatures.

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Section: Discussionmentioning

confidence: 60%

Section: Microstructure Studies By Semmentioning

confidence: 60%

Effect of Freeze–Thaw Cycles on the Performance of Concrete Containing Water-Cooled and Air-Cooled Slag

et al. 2021

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“…Mass loss rate means the loss of mass caused by exfoliation of the concrete surface resulting from freezing and thawing, and the lower the mass loss rate is, the better the freezing and thawing resistance is [5,6]. Also, the durability factor of concrete can be calculated by measuring the relative dynamic modulus (Figure 2).…”

Section: B Evaluation Of the Freezing And Thawing Resistance Performmentioning

confidence: 99%

Analysis of Durability and Shrinkage Properties of HPC Applicable to Nuclear Power Plants by Replacement of Mineral Admixtures

Seo¹,

Lee²,

Yang³

et al. 2016

Advances in Computer Science Research

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Abstract-In this study, we evaluated the durability and the shrinkage of concrete mixes for constructing nuclear power plant structures, prepared by replacing some of the concrete with diverse admixtures. The experiment variables were the types of admixtures and the replacement rate, and mixing of the two-component and three-component system concrete was carried out. The parameters for evaluating concrete durability were compressive strength, salt damage resistance, and freezing and thawing resistance that are the major durability characteristics for nuclear power plant structures, and measurements were made till the material age of 91 days. Though most mixes showed freezing and thawing resistance performances equal to or better than that of the existing concrete mix for nuclear power plants, the freezing and thawing resistance was affected considerably by the air content of the concrete rather than by the types of the admixtures and the replacement rate. Further, the concrete produced by replacing some of the cement with fly ash was found to have better salt damage resistance than the concrete produced by replacing some of the cement with blast furnace slag. The measured durability of the concrete produced by replacing some of the concrete with blast furnace slag was found to be higher than that of the existing concrete mix for use in the construction of nuclear power plants.

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