Contributions of Concrete Recycling Technology toward Sustainable Development: Standards and Technologies Related to Recycled Aggregate Concrete in Japan (持続可能な発展に向けたコンクリートリサイクル技術への貢献－日本における再生骨材コンクリートの規格と技術)

UTC (University of Transport and Communications、 国立交通運輸大学*1)が授与

*1　本学協定校

In sincere gratitude for shaping his valuable knowledge in the keynote speech during the November 2020 third International Conference on Sustainability in Civil Engineering (ICSCE2020) held at Hanoi, Vietnam*2.

*2 https://icsce2020.sciencesconf.org/resource/page/id/12　(海外からはオンライン参加)

Abstract*3: Concrete waste contains harmful trace elements due to the use of cement, such as hexavalent chromium and lead. The most promising alternative materials are recycled aggregate concrete prepared using the aggregate replacement method, the uses of which are confined to concrete prepared from original mortar and/or original cement paste that contain toxic substances such as hexavalent chromium. The results of this study provide evidence for the effectiveness of using low-quality recycled aggregate concrete, such as of Class L, specified in the Japanese industrial standard (JIS) directive (JIS A 5023).

*3本学アジア研究所公募型PJ「アジアの建設工事における再生骨材コンクリートの普及展開」にて実施中。

ICSCE2020には道正研究室の大学院生3人も参加しました。一般発表論文は約180編でしたが、A、B、Cの3ランクに分類され、AはJournal (JMES)*4 、Bは Conference Proceedings、CはUTCのReportに掲載となりましたが、Aに2人Duc NGUYEN ANH (グェンアン ドゥク)さん (D1)とPhuong DAO THI(ダオティ フオン) さん(M1)が採択されました(一般発表からの採択：21編)。

Duc NGUYEN ANH etc., Material Design for Concrete Using Low-Quality Recycled Aggregate

Phuong DAO THI etc., Expanding the Use of Fly Ash as an Admixture in Concrete in Vietnam

*4 http://revue.ummto.dz/index.php/JMES/issue/view/184/showToc