کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7884483 1509712 2018 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of environmental exposure on autogenous self-healing of cracked cement-based materials
ترجمه فارسی عنوان
اثر قرار گرفتن در معرض محیط زیست بر روی خودآزمایشات خودآزشی مواد سیمان ترک خورده
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی صنعتی و تولید
چکیده انگلیسی
Despite abundant literature on self-healing of cement-based materials, there is dearth of information on how environmental exposure affects self-healing. In this study, self-healing of cracks in cement mortar under different environmental exposure was investigated. Pre-cracked mortar specimens were submerged in water, while identical specimens were exposed to cyclic temperature and relative humidity. Change in crack width was examined using optical microscopy. SEM coupled with energy dispersive X-ray analysis was used to identify healing compounds. Mercury Intrusion Porosimetry, water absorption and permeability were employed to assess porosity. X-ray computed tomography was deployed to explore healing of internal cracks. No significant self-healing occurred in specimens exposed to cyclic T and RH. Although crack self-healing was identified in submerged specimens, X-ray μCT demonstrated that it was limited to exposed surface of specimens. This warrants further research to bridge the gap between laboratory findings on self-healing and actual field performance of ageing civil infrastructure.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Research - Volume 111, September 2018, Pages 197-208
نویسندگان
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