کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4913518 1428767 2017 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A probabilistic framework to justify allowable admixed chloride limits in concrete
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
A probabilistic framework to justify allowable admixed chloride limits in concrete
چکیده انگلیسی
Chloride induced corrosion in concrete is a well-known issue. Although numerous researchers have attempted to quantify the chloride threshold limits (CT) in different concrete systems (with little consensus), the issue of allowable admixed chlorides (CA) in concrete is still very much unresolved. For example, The CA limits specified by the American Concrete Institute (ACI) committees range from 0.06 to 1 percent by the weight of cement or cementitious materials. Similarly, the CA limits published by the State Highway Agencies in the U.S. vary significantly from one State to another (up to 9000 times difference). These significant differences and the variability in the published CA values can have significant economic and engineering risks. Therefore, it is essential that a standardized approach be developed to minimize these risks. The objective of the present study is to introduce a framework to remove subjectivity and variability in the decision-making process regarding CA. This paper provides a description of the development of the framework and economic assessment of selecting CA based on the first-order reliability method (FORM), spatial modeling techniques, and quantitative decision making tools. The proposed framework would help policy and decision makers realize the significant influence of CA on the corrosion of reinforcing steel in concrete and life-cycle cost of a project, and ultimately assisting them in making unbiased decisions that have scientific underpinnings.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 139, 15 May 2017, Pages 490-500
نویسندگان
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