WEKO3
アイテム
各種二水セッコウから製造した半水セッコウの水和特性
http://hdl.handle.net/10649/289
http://hdl.handle.net/10649/289bb927974-c5bc-4c25-8197-095296b85e26
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
K1_12.pdf (436.3 kB)
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| アイテムタイプ | 紀要論文 / Departmental Bulletin Paper(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2011-02-15 | |||||
| タイトル | ||||||
| タイトル | 各種二水セッコウから製造した半水セッコウの水和特性 | |||||
| 言語 | ||||||
| 言語 | jpn | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | departmental bulletin paper | |||||
| 著者 |
斎藤, 勝一
× 斎藤, 勝一 |
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| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 758 | |||||
| 姓名 | サイトウ, カツイチ | |||||
| 著者別名 | ||||||
| 識別子Scheme | WEKO | |||||
| 識別子 | 759 | |||||
| 姓名 | Saito, Katsuichi | |||||
| 著者所属 | ||||||
| 値 | 長岡技術科学大学 | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In order to examine the hydration behavior calcium sulfate hemihydrate prepared from various gypsum, compressive strength test, X-ray diffraction analysis, microscopic observation and electric conductance measurement were performed. Obtained resules were as follows: (1) Compressive strength of sample increased as standing time increased. Also, in the case of gypsum obtained from desulfurized flue gas by using the direct lime method, it reached to the saturation value after being crude for one day. (2) The X-ray diffraction analysis showed that the crystallinity of the gypsum dose not affect the compressive strength. (3) From the results of microscopic observation it was found that comparatively large crystals appear for the hydration of the hemihydrate obtained as byproduct by applying the indirect gypsum method and the direct method to the manufacturing process of phosphoric acid, and that many small needle crystals appear interwinded for the hydration of hemihydtare obtained from desulfurized flue gas and from waste water. (4) From the results of electric conductance measurement, it was found that the gypsum obtained as byproduct in the production of phosphoric acid shows lower solubility and lower hydration rate than those obtained from flue gas or waste water. This is because higher degree of oversaturation of the latter produces more crystalline nuclei of hemihydrate compared with the former. | |||||
| 書誌情報 |
長岡技術科学大学研究報告 巻 1, p. 104-110, 発行日 1980-03-25 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0388-5631 | |||||
| 書誌レコードID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AN00177120 | |||||
| 著者版フラグ | ||||||
| 出版タイプ | VoR | |||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
| その他のタイトル | ||||||
| その他のタイトル | The hydration behavior of calcium sulfate hemihydvate prepared from various gypsum | |||||
| 出版者 | ||||||
| 出版者 | 長岡技術科学大学 | |||||
