کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11032814 | 1645133 | 2018 | 28 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Size effect on splitting strength of hardened cement paste: Experimental and numerical study
ترجمه فارسی عنوان
اثر اندازه بر روی قدرت تقسیم شدن خمیر سیمان سخت شده: مطالعه تجربی و عددی
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کلمات کلیدی
تست میکرو مکانیکی، مقیاس طول چندگانه، استحکام کششی تقسیم، مدل سازی مشبک، خمیر سیمان سخت شده،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
چکیده انگلیسی
Cement paste possesses complex microstructural features including defects/pores over a range of length-scales, from nanometres to millimetres in size. As a consequence, it exhibits different behaviour under loading depending on the size. In this work, cubic specimens in a size range of 1: 400 were produced and tested by a one-sided splitting concept using different testing instruments. The smallest specimen with size of 100â¯Î¼m showed a high nominal splitting strength (18.81â¯MPa), an order of magnitude higher than the measured strength of 40â¯mm specimen (1.8â¯MPa). The test results were used to fit existing analytical size effect models. Although a good fit can be found for the existing size effect models, special attention should be given to the physical meaning behind these empirical parameters. In addition, a multi-scale modelling strategy that considers microstructural features at different length scales was adopted to model the trend of decreasing strength with specimen size observed in experiments. A good agreement between experimental observations and modelling results indicates that the featured material structure dominates the observed size effect on measured strength in the size range considered.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cement and Concrete Composites - Volume 94, November 2018, Pages 264-276
Journal: Cement and Concrete Composites - Volume 94, November 2018, Pages 264-276
نویسندگان
Hongzhi Zhang, Branko Å avija, Yading Xu, Erik Schlangen,