Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Leaching and Permeation of Chloride Ions from Seawater and Sea Sand Concrete
In this paper, the chloride leaching from seawater and sea sand concrete (SSC) to freshwater (static water and dynamic water) and the penetration of chloride into normal concrete (NC) were investigated. Meanwhile, the chloride permeation between SSC and NC was simulated by COMSOL software. The results show that chloride ions in SSC slowly migrated from the inside to the surface and form a surface enrichment phenomenon in the area of 0–5 mm when immersion in the freshwater environment. Increasing the concrete strength can delay the leaching of chloride ions and the total leaching amount were only 0.116–0.158 mg Cl/g concrete after 189 d. The leaching rate can be accelerated by changing the leach solution regularly, and the chloride ions leaching from concrete with volume of 1 dm3 was 50–85 mg each time. Chloride ions were first enriched at 2 mm on the surface of SSC and then partially penetrated into NC, and the penetration depth is 5 mm after combining for 90 d. The simulation results show that the relative humidity inside the concrete was the key parameter to determine the penetration rate of chloride ions, and the chloride penetration into NC was inhibited by its lower humidity.
Leaching and Permeation of Chloride Ions from Seawater and Sea Sand Concrete
In this paper, the chloride leaching from seawater and sea sand concrete (SSC) to freshwater (static water and dynamic water) and the penetration of chloride into normal concrete (NC) were investigated. Meanwhile, the chloride permeation between SSC and NC was simulated by COMSOL software. The results show that chloride ions in SSC slowly migrated from the inside to the surface and form a surface enrichment phenomenon in the area of 0–5 mm when immersion in the freshwater environment. Increasing the concrete strength can delay the leaching of chloride ions and the total leaching amount were only 0.116–0.158 mg Cl/g concrete after 189 d. The leaching rate can be accelerated by changing the leach solution regularly, and the chloride ions leaching from concrete with volume of 1 dm3 was 50–85 mg each time. Chloride ions were first enriched at 2 mm on the surface of SSC and then partially penetrated into NC, and the penetration depth is 5 mm after combining for 90 d. The simulation results show that the relative humidity inside the concrete was the key parameter to determine the penetration rate of chloride ions, and the chloride penetration into NC was inhibited by its lower humidity.
Leaching and Permeation of Chloride Ions from Seawater and Sea Sand Concrete
RILEM Bookseries
Banthia, Nemkumar (Herausgeber:in) / Soleimani-Dashtaki, Salman (Herausgeber:in) / Mindess, Sidney (Herausgeber:in) / Li, Shicai (Autor:in) / Jin, Zuquan (Autor:in)
Interdisciplinary Symposium on Smart & Sustainable Infrastructures ; 2023 ; Vancouver, BC, Canada
Smart & Sustainable Infrastructure: Building a Greener Tomorrow ; Kapitel: 77 ; 861-874
RILEM Bookseries ; 48
20.02.2024
14 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
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