کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6722386 503592 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of mechanical behavior and mechanism of calcium carbonate whisker-reinforced cement mortar
ترجمه فارسی عنوان
خصوصیات رفتار مکانیکی و مکانیزم ملات سیمان تقویت شده سیمان کربنات کلسیم
کلمات کلیدی
کربنات کلسیم سبیل، ملات، مواد فیبر، تقویت، خاصیت مکانیکی، مکانیسم تقویت
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی عمران و سازه
چکیده انگلیسی
In order to reinforce cement mortar, a new kind of micro-fibrous material, calcium carbonate whisker (CaCO3 whisker), was incorporated in this study. Microstructure, mechanical properties and reinforcing mechanism of this composite were characterized. It was found that the addition of CaCO3 whisker improved not only the compressive and flexural strength of cement mortar, but also the load-deflection curves and work of fracture. Further work using mercury intrusion porosimetry tests confirmed the filler effect and the refining of the pore distribution of whiskers in cement mortar. Scanning electron microscopy showed that the microscopic mechanism primarily consists of whisker pullout, crack deflection, whisker-cement coalition pullout, whisker bridging and whisker breakage. These mechanisms are related to the matrix strength. As compared to the strong matrix, the weak matrix that was modified with CaCO3 whisker achieved the highest increase in strength and toughness of the cement mortar. This is likely attributed to the crack deflection mechanism, which is weakened by the strong interfacial bonding between the CaCO3 whisker and cement matrix in the stronger mortar matrix.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 66, 15 September 2014, Pages 89-97
نویسندگان
, , , ,