کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8947084 | 1645545 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Strength and microstructure of CO2 cured low-calcium clinker
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی عمران و سازه
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چکیده انگلیسی
Portland cement clinker contains more than 50% tri-calcium silicate (C3S) and is produced at â¼â¯1450â¯Â°C, which releases about 850â¯kg CO2 per ton of clinker. Therefore, the use of dicalcium silicate (C2S) or rankinite (C3S2) in cement can be an alternative to reduce CO2 emission due to their low-calcium. In the present study, a novel low-calcium clinker containing C3S2-γ-C2S-C2AS (Ca2Al2SiO7) was synthesized, then the clinker was under carbonation curing. Experimental results show that the low-calcium clinker was synthesized at sintering temperature of 1320â¯Â°C, lower 130â¯Â°C than that of Portland cement. The clinker with non-hydraulic phases can be fully harden within 24â¯h and obtain a higher compressive strength. The mainly carbonation products of the clinker were calcite, aragonite and polymerization silica gels, which was attributed to the compressive strength development. In addition, calcium hydroxide and C-S-H were not detected due to the non-hydraulicity properties of C3S2 and γ-C2S. The carbonated clinker samples displayed a denser microstructure and lower pore structure. This study shows that the low-calcium and low sintering temperature clinker can obtain a better performance through carbonation curing.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Construction and Building Materials - Volume 188, 10 November 2018, Pages 417-423
Journal: Construction and Building Materials - Volume 188, 10 November 2018, Pages 417-423
نویسندگان
Bao Lu, Caijun Shi, Guihua Hou,