著者

十河 茂幸

出版者

日経BP社

雑誌

日経コンストラクション (ISSN:09153470)

巻号頁・発行日

no.488, pp.74-77, 2010-01-22

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2001年に創設されたコンクリート診断士の試験が今年で10回目を迎える。日本コンクリート工学協会が認定する民間資格だが、コンクリートの診断や維持管理に対する知識と技術力を裏付ける資格として存在感が増している。「2010年版コンクリート診断士試験合格指南」(日経BP社刊)の共著者である十河茂幸氏に執筆を依頼し、今号から隔号で診断士試験の対策をお伝えする。

著者

大東 延幸 十河 茂幸

出版者

広島工業大学

雑誌

広島工業大学紀要. 研究編 (ISSN:13469975)

巻号頁・発行日

vol.50, pp.15-18, 2016-02

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The anti-aircraft strategy operation room, which used to be a facility of the old Japanese army and still exists in the precincts of Rijo-Castle, is a structure exposed to radiation in 1945 when the atomic bomb was dropped on Hiroshima. This structure has never been used since the end of World War II, and has become decrepit. No official documents of the structure remain, and the details of its present condition are not known well.On the 70th anniversary of the end of the war, a survey was conducted, and the architectural style, materials, anti-aircraft efficiency, and soundness of the structure were investigated by researchers. As a result of the survey, it was found that the structure had been built in a semibasement so that it could bear air raid, and that it was made of reinforced concrete. Through the observations of the parts which researchers were able to enter, it was found that the floors, the walls, and the ceilings had been largely exfoliated, and some kind of rapid countermeasures seem necessary to prevent the further deterioration. At the same time, as a result of interviews with people who know of the situations 70 years ago, it has become known to some extent how the inner parts of the structure were used. Based upon these findings, an exhibition of the anti-aircraft strategy operation room was held from July to September in 2015.It is not appropriate to make large-scale changes of the structure, because it is a historic relic located in the precincts of Hiroshima Castle. However, it is clear from the survey that the deterioration is continuing, and, it is recommended that some measures should be taken for its preservation and some good use in the future.

著者

大東 延幸 十河 茂幸

出版者

広島工業大学

雑誌

広島工業大学紀要. 研究編 (ISSN:13469975)

巻号頁・発行日

vol.51, pp.41-44, 2017-02

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The anti-aircraft strategy operation room, which used to be a facility of the old Japanese army and still exists in the precincts of Rijo-Castle, is a structure exposed to radiation in 1945 when the atomic bomb was dropped on Hiroshima. This structure has never been used since the end of World War II, and has become decrepit. No official documents of the structure remain, and the details of its present condition are not known well. These facilities were also investigated the current year following fiscal year 2015. (1) made a drawing of the anti-aircraft war room more in-depth than an investigation, (2) the interior where a crack around the ceiling of the approach structure in the anti-aircraft war room where was found newly was used,(3) the underground utility was checked around the anti-aircraft war room,(4) related literature search was performed, in fiscal year 2015 the current year. This structure was in Rijo-Castle, so all one which exists in Rijo-Castle couldn't change the current state for a historical site, so it was to investigate in the area which can be done by non-destruction.It's clear from an investigation that deterioration continues, and it's recommended that several ways will be taken for the preservation and some good use in the future. It'll be expected also to continue investigation activity from now on.

著者

上野 敦 十河 茂幸

出版者

公益社団法人 日本コンクリート工学会

雑誌

コンクリート工学 (ISSN:03871061)

巻号頁・発行日

vol.51, no.12, pp.967-974, 2013 (Released:2014-12-01)

参考文献数

3

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近年,骨材が多様化しており,物性の範囲も広くなっている。このため,既往の測定試験法ではその適用が困難となる場合がある。コンクリートの配(調)合設計上重要な意味を持つ,細骨材の密度および吸水率試験もその1つである。コンクリート基本技術調査委員会では,細骨材品質WGを設置し,細骨材に対する密度および吸水率試験法の整理を行い,それらの測定原理に基づいて,各種の細骨材にこれらの試験方法の適用が困難となる細骨材物性を検討してきた。本報告は,この活動の一環として実施した実験結果をまとめ,広範囲の物性を有する細骨材の密度および吸水率を,異なる測定原理の試験方法で測定した場合の結果の変動について検討したものである。

著者

十河 茂幸

出版者

日経BP社

雑誌

日経コンストラクション (ISSN:09153470)

巻号頁・発行日

no.499, pp.74-77, 2010-07-09

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試験は7月25日に全国の会場で一斉に実施される。今の段階になれば、受験者は既に様々な種類の過去問題に当たっているはずだ。これまでに覚えた問題のパターンや知識を試験で十分に生かすために、基本的な数値や分析方法などを直前に再確認しておく。記述式問題に割く時間は2問で計90分は欲しい。その時間を確保するためにも、四肢択一式問題に時間を掛けすぎないようにする。