کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
249342 502606 2009 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Moisture transport through perforated vapour retarders
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
پیش نمایش صفحه اول مقاله
Moisture transport through perforated vapour retarders
چکیده انگلیسی

Nowadays, in most cases and according to recent international standards, moisture transport in building envelopes is assumed as one-dimensional. In fact, three-dimensional moisture transport occurs due to layer perforation or building assembly details. The article is focused on cases of low-slope compact roofs with a waterproofing membrane where the vapour retarder is perforated. Water vapour permeability measurement of different vapour retarders with different degrees of perforation is done by the wet-cup method. Results are presented. A significant increase of moisture transport is found through vapour retarders although their percentage of perforation was much lower than in previous known studies. A description of setting the apparatus to measure materials with a very high water vapour resistance factor is presented. Finally, based on the results, we formulated an analytical equation that describes water vapour diffusion flux through perforated vapour retarders. A simple equation can be used in cases where only one-dimensional moisture transport is calculated, which will help building designers to determine diffusion properties of perforated vapour retarders.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Building and Environment - Volume 44, Issue 8, August 2009, Pages 1617–1626
نویسندگان
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