کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
259393 503632 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Modeling of water permeability in early aged concrete with cracks based on micro pore structure
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
پیش نمایش صفحه اول مقاله
Modeling of water permeability in early aged concrete with cracks based on micro pore structure
چکیده انگلیسی

The pores and pore connectivity in concrete cause rapid water permeation. This is an important characteristic of porous material. Cracks in early aged concrete can be easily caused by restraint stress due to the process of hydration heat or drying shrinkage. Cracked concrete is vulnerable to water permeation. This can lead to rapid corrosion of the steel inside. In this paper, numerical modeling of water permeability in cracked concrete is performed, considering the behavior of early aged concrete such as porosity and saturation. Previously developed models that cover hydration, pore structure, and moisture transport are analyzed. The crack effect on water permeation in a representative elementary volume (REV) is analytically derived through averaging water permeation in sound concrete and crack width. An analysis technique is proposed through the equivalent permeability model in REV. Thirty-three concrete samples with crack width of 0.1–0.4 mm are prepared and water penetration tests (WPT) are performed to verify the proposed technique. The proposed technique is evaluated to reasonably predict both the increasing permeability with crack opening and the decreasing permeability with extended curing period.


► We modeled water permeability in early aged concrete.
► Analytical modeling on water permeability through averaging technique is performed.
► Water permeability considering both hydration and crack effect is derived.
► Good agreement with experimental results is shown for large crack over 0.3 mm.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 27, Issue 1, February 2012, Pages 597–604
نویسندگان
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