کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6723830 | 503603 | 2014 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Volumetric deformation of gap-graded blended cement pastes with large amount of supplementary cementitious materials
ترجمه فارسی عنوان
تغییر شکل حجمی سیمان مخلوط شده با شکاف با مقدار زیادی مواد سیمان اضافی
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کلمات کلیدی
سیمان مخلوط شده، تغییر شکل حجمی، انقباض شیمیایی، محصولات هیدراتاسیون،
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
چکیده انگلیسی
In this study, volumetric deformation of gap-graded blended cement pastes with large amount of supplementary cementitous materials was investigated and compared with those of Portland cement and reference blended cement pastes. The results show that the gap-graded blended cement pastes presented a higher initial packing density, therefore smaller amount of hydration products was needed to achieve dense microstructure, resulting in smaller chemical shrinkage. Notably, most of chemical shrinkage of gap-graded blended cements was occurred after the formation of skeleton structure, thus the autogenous shrinkage of gap-graded blended cements was reduced significantly due to restraint of the skeleton structure. Further, the microstructure of gap-graded blended cement pastes was dense and homogeneous due to grain size refinement and significant hydration of GBFS, and shrinkage stress was small and uniformly distributed. As a result, gap-graded blended cement pastes presented smaller volumetric deformation and superior resistance to cracking than Portland cement and reference cement pastes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 54, 15 March 2014, Pages 339-347
Journal: Construction and Building Materials - Volume 54, 15 March 2014, Pages 339-347
نویسندگان
Tongsheng Zhang, Peng Gao, Ruifeng Luo, Jiangxiong Wei, Qijun Yu,