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ID 50506
本文ファイル
著者
Phuong Trinh Bui
Ogawa, Yuko 大学院先進理工系科学研究科 広大研究者総覧
Kawai, Kenji 大学院先進理工系科学研究科 広大研究者総覧
キーワード
Compressive strength
Hydration
Setting time
Thermal gravimetric analysis
X-ray diffraction
抄録(英)
In the study, the effect of 4% sodium sulfate (Na2SO4) as an activator on cement pastes with 0%, 20%, and 40% fly-ash replacements and a low water-to-cementitious materials ratio of 0.30 was investigated. The investigation was conducted to evaluate the effectiveness of the technique for the utilization of fly ash in developing sustainable concrete. The use of Na2SO4 decreased setting times of the fresh pastes and increased compressive strength of the hardened pastes up to 28 days irrespective of fly-ash replacement. The use decreased Ca(OH)2 content in the hardened pastes irrespective of fly-ash replacement. Meanwhile, it increased Ca(OH)2 consumption by the pozzolanic reaction of fly ash and content of calcium silicate and aluminate hydrates in the hardened fly-ash–cement pastes. Consequently, the use of Na2SO4 negatively affected cement hydration in the hardened cement pastes without fly ash, while it accelerated ettringite formation and pozzolanic reaction of fly ash in the hardened pastes.
掲載誌名
Journal of Materials in Civil Engineering
32巻
6号
開始ページ
04020117
出版年月日
2020-06
出版者
American Society of Civil Engineers
ISSN
0899-1561
1943-5533
出版者DOI
言語
英語
NII資源タイプ
学術雑誌論文
広大資料タイプ
学術雑誌論文
DCMIタイプ
text
フォーマット
application/pdf
著者版フラグ
author
権利情報
This material may be downloaded for personal use only. Any other use requires prior permission of the American Society of Civil Engineers. This material may be found at https://doi.org/10.1061/(ASCE)MT.1943-5533.0003195.
This is not the published version. Please cite only the published version. この論文は出版社版ではありません。引用の際には出版社版をご確認、ご利用ください。
関連情報URL
部局名
先進理工系科学研究科