Zobrazeno 1 - 10 of 21 pro vyhledávání: '"Masami Uzawa"'
5
POROSITY PROPERTIES OF VACUUM FREEZE DRIED AND D-DRIED HARDENED CEMENT SPECIMENS MEASURED BY MERCURY INTRUSION POROSIMETRY
Autor: Masami Uzawa, Yoshinari Itoh, Shin Yamaguchi
Publikováno v: Cement Science and Concrete Technology. 66:135-142
The authors previously proposed drying conditions for vacuum freeze drying of mercury intrusion porosimetry specimens, with the focus placed on the dehydration of ettringite. In the present study hardened specimens of normal portland cement and those
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::09e62ef634c3d8b87923ef3ae362f5ff
https://doi.org/10.14250/cement.66.135
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6
Freeze-Drying Conditions Non-Altering to Ettringite Contained in Hardened Cement and the Pore Size Distribution
Autor: Shigeo Koshikawa, Shin Yamaguchi, Masami Uzawa, Yoshinari Itoh
Publikováno v: Journal of the Society of Materials Science, Japan. 59:131-136
The freeze drying process for hardened bodies of cement consists of a freezing step by liquid nitrogen and a drying step by vacuum. The use of liquid nitrogen during the process involves the risk of cracking due to heat impact. The authors made impro
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6c379167a41bc9c90fc7fe1203472a21
https://doi.org/10.2472/jsms.59.131
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7
The Mechanism of Compressive Strength Development for Cement Pastes Cured at High Temperature and the Possibility of Additives as to Improve Long-Term Strength
Autor: Masami Uzawa, Haruka Takahashi, Ryuichiro Kuga, Hiroaki Mori
Publikováno v: Journal of the Society of Materials Science, Japan. 59:743-750
The purpose of this study is to discover a method for improving the long term strength gain of steam cured cement pastes. Pastes of ordinary portland cement (OPC) and blended cement (containing 40% ground granulated blast furnace slag GGBFS) were cur
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5a52efc39f3b45cda6eb88564ae6e106
https://doi.org/10.2472/jsms.59.743
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9
Various Hydration Reactions of Silica Fume Blended Cement under Different Curing Conditions, and a Hypothesis for the Ultra High Strength Development Mechanism of RPC
Autor: Shigeo Koshikawa, Yoshihide Shimoyama, Masami Uzawa
Publikováno v: Journal of the Society of Materials Science, Japan. 55:114-121
Two-component mortar paste consisting of cement and silica fume was cured in water or steam, and its strength development, cement hydration capacity and silica fume reaction rate were analyzed to identify the role of the admixture, determine the opti
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::88fa8494677dbb118c4e4ff8fa8a63db
https://doi.org/10.2472/jsms.55.114
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10
X-ray Spectral Behavior in the Low/Hard States of Black Hole Candidates
Autor: T. Yamazaki, Atsumasa Yoshida, Masami Uzawa, Mariko Arai, Kazutaka Yamaoka
Publikováno v: Chinese Journal of Astronomy and Astrophysics. 5:273-278
We carried out systematic spectral analysis for 10 black hole candidates (BHCs) in the low/hard states, using archival RXTE and Beppo-SAX data which cover a broad energy range of 2–250 keV. For in total 156 observations, the simple analytic model,
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4a7d5b3ea5ef978fc77c811bf7d75be4
https://doi.org/10.1088/1009-9271/5/s1/273
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