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福井地方のコンクリー卜品質
http://hdl.handle.net/10098/4965
http://hdl.handle.net/10098/496561155c94-ce78-4c7c-9308-dc8e90318124
名前 / ファイル | ライセンス | アクション |
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AN00215401-13-01-001.pdf (633.3 kB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2012-02-15 | |||||
タイトル | ||||||
タイトル | 福井地方のコンクリー卜品質 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Quality of Concrete in Fukui District | |||||
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 |
川上, 英男
× 川上, 英男× KAWAKAMI, Hideo |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | This paper is presented to report on an investigation carried out recently in order to find the quality of concrete used for buildings in Fukui district. It covered 186 cases containing field-mixed concrete and ready-mixed concrete. 127 cases were examined by compression test of 381 standard specimens,while 59 cases were investigated by Schmidt hammer tests at 916 parts. In every case the mean value and the standard deviation of concrete strengths were calculated. The strength and the uniformity of concretes were judged using these values assuming that the strength of concretes follows Gaussian distribution. The main facts revealed by this work are as follows : 1. The uniformity of concrete quality in each case was rather satisfactory. 2. Strengths of concretes were not always high enough to satisfy the designed value. At least about 50% of all cases were considered to be lying under the needed strength. It is pointed that the cause of the low strength of the concrete can be sought in the neglect of the cement strength adjustment against those expected lower temperatures at the mixing design and in the failure of attaining the good workability of concrete. The latter failure, in case of ready-mixed concrete, will so frequent1y be liable to bring about the addition of too much water just before the placing. And this would originate from unreasonable low price compelled by an excessive price competition. A better concrete should be acquired by the appropriate mixing design provided that a reasonable price is well maintained | |||||
書誌情報 |
福井大学工学部研究報告 巻 13, 号 1, p. 1-9, 発行日 1965-03 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 4298373 | |||||
書誌レコードID | ||||||
識別子タイプ | NCID | |||||
関連識別子 | TD00003561 |