Variation in Service Life on RC Structure According to Concrete Binder Type
| Autor: | JangHyun Park, MyeongGyu Jung, JinHo Park |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
additive
chloride ion diffusion coefficient Materials science 0211 other engineering and technologies Rebar chemistry.chemical_element 02 engineering and technology lcsh:Technology Chloride Article Corrosion law.invention law 021105 building & construction medicine Chlorine General Materials Science Composite material lcsh:Microscopy service life lcsh:QC120-168.85 Cement corrosion lcsh:QH201-278.5 lcsh:T 021001 nanoscience & nanotechnology reinforced concrete critical chloride content Types of concrete chemistry lcsh:TA1-2040 Ground granulated blast-furnace slag Service life lcsh:Descriptive and experimental mechanics lcsh:Electrical engineering. Electronics. Nuclear engineering lcsh:Engineering (General). Civil engineering (General) 0210 nano-technology lcsh:TK1-9971 medicine.drug |
| Zdroj: | Materials Materials, Vol 13, Iss 5430, p 5430 (2020) Volume 13 Issue 23 |
| ISSN: | 1996-1944 |
| Popis: | When an additive is used to replace a certain amount of cement, a concrete pore structure becomes dense. Thus, it results in inhibiting the penetration of chlorine ions and suppressing corrosion of reinforcing bars. However, the pH level of the concrete decreases, and it deteriorates the performance of the passive film formed on the surface of the rebars embedded in the concrete. Therefore, in this study, the service lives of reinforced concrete containing different types of concrete binders were predicted and compared. The chloride ion diffusion coefficients of concretes with various binders were measured, and the critical chloride content of the rebar was assessed by the real-time monitoring on the corrosion initiation time of the rebar embedded in concrete. Moreover, Fick&rsquo s 2nd law was applied to predict when the chloride content at the 40 mm depth of cover reached the critical chloride content based on the chloride ion diffusion coefficient. It was observed that the service life of S6 (OPC 40% + GGBFS 60%) was the highest, followed by TBC (OPC 40% + GGBFS 40% + FA 20%), S3 (OPC 70% + GGBFS 30%), and OPC (OPC 100%). |
| Databáze: | OpenAIRE |
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