Study on characteristics change and its mechanism of cementitious materials exposed to 60-80 degrees C
Project/Area Number |
25289130
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Research Category |
Grant-in-Aid for Scientific Research (B)
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Allocation Type | Partial Multi-year Fund |
Section | 一般 |
Research Field |
Civil engineering materials/Construction/Construction management
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Research Institution | Saitama University |
Principal Investigator |
ASAMOTO Shingo 埼玉大学, 理工学研究科, 准教授 (50436333)
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Co-Investigator(Kenkyū-buntansha) |
KURAHIGE Isao 電力中央研究所, 地球工学研究所, 主任研究員 (20371461)
NAWA Toyoharu 北海道大学, 大学院工学研究院, 教授 (30292056)
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Project Period (FY) |
2013-04-01 – 2016-03-31
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Project Status |
Completed (Fiscal Year 2015)
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Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2015: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Fiscal Year 2013: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
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Keywords | セメント硬化体 / 高温負荷 / 物性変化 / 遅延エトリンガイト生成 / フライアッシュ / 組織変化 / 混和材 |
Outline of Final Research Achievements |
In this study, mechanical properties such as compressive strength and chemical degradation of cementitious materials exposed to 60-80 °C was examined. As a result, history of 80 °C during the curing can retard the strength development comparing to 20 °C curing case based on the pore structure change. It was also found that the cement with limestone powder is more probable to cause a map cracking on the surface of cementitious materials when they are exposed to high temperature at early ages. It is suggested that the replacement of cement with fly ash can be effective to inhibit the chemical degradation and to avoid the large strength reduction depending on the aggregate type.
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Report
(4 results)
Research Products
(9 results)
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[Presentation] S. Asamoto, K. Murano, I. Kurashige and D. Minato2014
Author(s)
Investigation into Characteristics of Cementitious Materials Exposed to High Temperature
Organizer
The 6th Asia-Pacific Young Researchers and Graduate Symposium, The Structural Engineering for Sustainable Development (YRGS2014)
Place of Presentation
Thammasat University, Thailand
Year and Date
2014-08-01
Related Report
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