کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6528357 | 1419835 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface scaling of CO2-cured concrete exposed to freeze-thaw cycles
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
کاتالیزور
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Surface scaling of concrete is one of the major durability issues for cold-region concrete materials. This study presents a solution of using CO2 curing to mitigate the concrete surface salt scaling induced by the freeze-thaw exposure. A laboratory freeze-thaw cyclic test was performed on the concrete made with Portland cement and fly ash. To understand the underlying mechanism, the pore structure of cement paste was evaluated by mercury intrusion porosimetry (MIP) and nitrogen adsorption/desorption (NAD). It was found that the total pore volume and pore size were noticeably reduced in the CO2-cured samples. CO2 curing leads to a dramatic refinement of the capillary pores, hence lessening the available microporous space for the ice formation. The densified concrete surface accounts for the enhanced resistance to the surface scaling.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of CO2 Utilization - Volume 27, October 2018, Pages 137-144
Journal: Journal of CO2 Utilization - Volume 27, October 2018, Pages 137-144
نویسندگان
Duo Zhang, Yixin Shao,