کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
258016 503605 2014 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The whole and the parts: Can lime coatings enhance the drying of salt laden materials?
ترجمه فارسی عنوان
کل و قطعات: آیا پوشش های آهک باعث افزایش خشک شدن مواد نمکی می شود؟
کلمات کلیدی
پوشش آهک، لیمو شستشو، میراث معماری، بناهای تاریخی، خشک کردن، مصالح ساختمانی متخلخل، نمکهای محلول سدیم کلرید، سولفات سدیم
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی


• Lime coatings can enhance drying with pure water but with salt solutions their effect is variable.
• With salts, the drying kinetics is slower, more irregular and shows higher dispersion.
• Also, with salts, the drying kinetics may diverge for specimens of a same material subjected to similar conditions.
• The variations in drying kinetics are in agreement with shifts in the salt decay patterns.
• Salts amplify the effects of material heterogeneity.

Lime coatings are frequent in the architectural heritage. Previous research has shown that they can accelerate the drying of porous materials, such as stone and mortars, which could help control the endemic problems of dampness of these constructions. Here, we investigate the effect lime coatings have when soluble salts are present. The work is based on evaporative drying tests performed on one lime coating applied on five substrate materials contaminated with solutions of NaCl or Na2SO4. Conclusions could be drawn about: (i) the behaviour of the coating; (ii) the salt decay process. It was observed that the coating can, in few cases, still enhance drying when salts are present. However, in comparison to pure water, the drying kinetics is slower, more irregular and shows higher dispersion. Also, it sometimes diverges among specimens of the same material subjected to similar experimental conditions. These chaotic variations are in agreement with the decay patterns and suggest that soluble salts amplify the effects of the natural heterogeneity of porous materials.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 57, 30 April 2014, Pages 179–189
نویسندگان
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