کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10128344 1645133 2018 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A study of the factors affecting the surface chloride maximum phenomenon in submerged concrete samples
ترجمه فارسی عنوان
بررسی عوامل مؤثر بر پدیده حداکثر کلراید در نمونه های بتنی زیرین
کلمات کلیدی
بتن، کلرید سطح، نفوذ، حداکثر پدیده، منطقه جابجایی،
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی
The chloride content analysis of the concrete exposed to chlorides often shows an initial increase in the concentration of chlorides to a maximum point within the first layers from the concrete surface, followed by a gradual reduction in the concentration of chlorides at the lower depths. A review of literature shows that very little attention has been given to the depth (Δx) at which the maximum chloride concentration (Cmax) occurs and its potential impacts on the numerical estimation of the apparent chloride diffusion coefficient (Da) and surface chloride concentration (Cs). This paper studies the influence of water-to-cement ratio (w/c), the concentration of chlorides in the environment, the time-to-exposure, and exposure duration on Cmax and Δx. Results show that w/c does not have a significant influence on Cmax. However, a significant increase in Δx is observed with an increase in the w/c. Results also show that while Cmax has time-variant properties and it increases nonlinearly with the exposure duration, exposure duration has minimal impacts on Δx. In addition, the time-to-exposure and the concentration of chlorides in the exposure environment are found to be significant factors influencing both Cmax and Δx. The findings of this study show that Δx has a significant impact on the numerical estimation of Da and Cs. Because Δx is not limited to the first millimeter of the concrete surface, as specified in ASTM C1556, care must be taken to exclude the layers that correspond to Δx.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Composites - Volume 94, November 2018, Pages 181-190
نویسندگان
, ,