کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8906381 1634410 2018 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Coupling effect of salt freeze-thaw cycles and cyclic loading on performance degradation of carbon nanofiber mortar
ترجمه فارسی عنوان
اثر متصل کردن چرخه یخ زدگی نمکی و بارگذاری چرخه ای بر عملکرد تخریب ملات نانویی کربن
کلمات کلیدی
نانوفیبری کربن، چرخه یخ زدایی نمک، بارگذاری سیکل، مدول الاستیک پویا نسبی، مقاومت الکتریکی،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات علوم زمین و سیاره ای (عمومی)
چکیده انگلیسی
This paper aims to investigate the coupling effect of salt freeze-thaw cycles and cyclic loading on weight loss, relative dynamic elasticity modulus and electrical resistance degradation of carbon nanofiber mortar. Three types of salt solutions with NaCl concentrations of 0%, 1.5% and 3.0% were adopted and two freeze-thaw temperatures cycles were carried out at −10 °C ~ 10 °C and −20 °C ~ 20 °C respectively. Cement mortars with water to cement (w/c) ratios of 0.5, 0.45, 0.4 and 0.35 were prepared by incorporating carbon nanofibers (CNFs) with 2.25% of cement volume. On the other hand, cyclic loading was applied to selected specimens before the freeze-thaw cycle test. Experimental results show that all specimens behaved little mass loss after exposure to the salt freeze-thaw cycles under temperature of −10 °C ~ 10 °C and a significant mass loss was induced by the freeze-thaw cycles in 1.5% NaCl and 3.0% NaCl solutions with temperature of −20 °C ~ 20 °C. On the other hand, no visible difference can be detected for the electrical resistance variation and the relative dynamic elasticity modulus under the two freeze-thaw temperatures for every salt solution. The cyclic loading treatment had an accelerating degradation of cement mortar induced by the salt freeze-thaw cycles. The electrical resistance increase of carbon nanofiber mortar reveals a similar tendency to the relative dynamic elasticity modulus loss. Therefore, carbon nanofiber mortar behaves a potential self-sensing performance for salt freeze-thaw cycles induced damage.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cold Regions Science and Technology - Volume 154, October 2018, Pages 95-102
نویسندگان
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