JCI-ACI ジョイントセミナー
JCI-ACI ジョイントセミナー
日本コンクリート工学会 (JCI) と米国コンクリート工学会 (ACI) は，2004年に交流協定を締結して国際交流事業を行なっています。その一環として，2013年に第一回JCI-ACI ジョイントセミナーが行われ， 2015年より隔年で日米交互にそれぞれの年次大会において同セミナーを開催して来ました。2021年の第5回ACI-JCI ジョイントセミナーがコロナ禍で延期となりましたが，本年2022年4月の2022 ACI Spring Convention にて無事開催されました。なお今回は，日米から2名ずつリモートで講演するヴァーチャルセッションの形式で行われました。今回は，初めての試みとして録画されたセッションを，そのままJCI 年次大会において公開するものです。また，講演は英語です。
今回公開するセッションの概略は以下の通りです。サステナブルなコンクリート構造物の設計法に関するテーマで報告が行われます。英文字幕も表示することが出来ますので，是非一度ご覧いただきたいと思います。
【セッションの題目】
− 発展するコンクリート構造物の設計法 − サステナブルな構造設計
【講演者と講演題目】
司会者：キース・ケスナー（CVM），三木朋広（神戸大学）
マイケル・ヘンリー氏（芝浦工業大学）
Evaluating the Sustainability of Concrete with Multicriteria Analysis
ロミオ・シウペカ氏（Greencraft LLC）
Hyaloclastite Natural Pozzolanic - A Substitute for
Fly Ash, Slag, Silica Fume and Metakaolin in
Normal and High Performance Concretes
今回公開するセッションの概略は以下の通りです。サステナブルなコンクリート構造物の設計法に関するテーマで報告が行われます。英文字幕も表示することが出来ますので，是非一度ご覧いただきたいと思います。
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年次大会に参加登録した方
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セミナーに参加登録した方
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| JCI-ACI ジョイントセミナー | 見逃し配信は終了しました。 | 見逃し配信は終了しました。 |
【セッションの題目】
− 発展するコンクリート構造物の設計法 − サステナブルな構造設計
【講演者と講演題目】
司会者：キース・ケスナー（CVM），三木朋広（神戸大学）
マイケル・ヘンリー氏（芝浦工業大学）
Evaluating the Sustainability of Concrete with Multicriteria Analysis
ロミオ・シウペカ氏（Greencraft LLC）
Hyaloclastite Natural Pozzolanic - A Substitute for
Fly Ash, Slag, Silica Fume and Metakaolin in
Normal and High Performance Concretes
丸山一平氏（名古屋大学）State-of-the Art on Development of Concrete and Related Technology
to Offset Carbon Emission in Japan
アンドリュー・テイラー氏 （KPFF Consulting Engineers）
Sustainability and the ACI Building Code: Plans for
the 2025 Edition of ACI 318
ACI/JCI - 5th Joint Seminar - Advancing the Design of Concrete Structures - Virtual Session - Sustainable Design Solutions
Concrete structure design is constantly evolving to incorporate new materials and analysis methods to produce structures that are both more robust and more efficient. The 5th ACI / JCI Joint Seminar, to be held at the ACI Convention in Spring 2023, will explore the advancement of design through sessions that focus on design of concrete components, advancements in concrete materials, design for seismic performance, and development of sustainable solutions. The ACI / JCI Joint Seminar is the fifth joint seminar co-sponsored by the American Concrete Institute and Japanese Concrete Institute. The seminars are intended to bring together researchers and practitioners from both organizations to share knowledge with the broader ACI / JCI communities and develop future collaborations.
As a special prequel, the Orlando Virtual session will explore topics in sustainability. The session will focus on new developments in sustainable concrete construction. The presentations will focus on development of methods to evaluate sustainability, measures to increase the sustainability of concrete construction and development of codes for sustainability.
Learning Objectives:
(1) Discuss how advancements in concrete sustainability can be evaluated;
(2) Describe how industry codes and standards are changing to allow for greater sustainability to be incorporated into the design process;
(3) Recognize how new materials are being developed as a replacement for portland cement;
(4) Describe industry changes being used to minimize carbon dioxide emissions.
Evaluating the Sustainability of Concrete with Multicriteria Analysis
Presented By: Michael Henry
Affiliation: Shibaura Institute of Technology
Description: To address the environmental impacts associated with the construction of concrete structures, it is necessary to holistically evaluate concrete based on its sustainability, rather than just performance and cost. Multicriteria analysis (MCA) is one promising approach to the sustainability evaluation of concrete, as it has been applied to inform sustainable decision making in many other
fields. This presentation introduces a framework for quantitatively evaluating the sustainability of concrete materials using MCA and discusses how to improve the robustness of the evaluation by managing methodological uncertainties in the analytical process.
Hyaloclastite Natural Pozzolanic - A Substitute for Fly Ash, Slag, Silica Fume and Metakaolin in Normal and High Performance Concretes
Presented By: Romeo Ciupeca: Greencraft LLC, Norcross, GA
Description: Hyaloclastite is formed by magma that extrudes into a water rich environment causing a rapid quenching of the magma, which prevents lava crystallization generally resulting in fractured lava with high amorphous content. When Hyaloclastite is ground into a fine powder, the resulting natural pozzolan can be used as a replacement for fly ash, slag, silica fume or metakaolin. Coarser grinding gives properties similar to fly ash. Finer grinding significantly outperforms fly ash and slag, with properties equivalent to those of concretes with silica fume or metakaolin, at a lower cost. The ground hyaloclastite provides improved ASR resistance, reduced chloride permeability, reduced capillary absorption, and enhanced strength. Though it provides reductions in chloride diffusion similar to silica fume and metakaolin, its aging factor is similar to fly ash and slag resulting in enhanced properties over time. Air entrainment freezing and thawing performance are similar to control mixes at the same w/cm.
State-of-the Art on Development of Concrete and Related Technology to Offset Carbon Emission in Japan
Presented By: Ippei Maruyama
Affiliation: Nagoya University
Description: Portland cement is the most mass-produced human-made material on earth. Since the invention of Portland cement, it has become an indispensable material for building structures and social infrastructure, and it is now the cornerstone of modern society. The CO2 emitted by the cement industry is estimated to account for approximately 7% of the world's total emissions. From this background, the sector of concrete industry reacts against CO2 emissions. In this contribution, activities of government, societies, and each company in concrete sector of Japan are summarized and discuss the direction of the required research, activities, and pathway to collaboration.
Sustainability and the ACI Building Code: Plans for the 2025 Edition of ACI 318
Presented By: Andrew Taylor
Affiliation: KPFF Consulting Engineers
Description: The 2025 edition of the ACI 318 Building Code Requirements for Structural Concrete will contain a new Appendix that will provide guidelines for improving the sustainable design of reinforced concrete structures. This appendix is being written by a new ACI 318 Subcommittee N on sustainability. The membership of Subcommittee N includes structural engineers, concrete producers, and experts on the environmental impacts of the entire life cycle of structural concrete, including production, construction, and recycling. Globally, producers of engineered structural materials, such as concrete, have sought ways to reduce greenhouse gas emissions, without adversely affecting the engineering design properties, quality, consistency, and economy of the materials. Most efforts have focused on the production processes for the materials themselves: the objective has been to reduce the emission of greenhouse gases created during creation of the bulk material. There has been progress on this front, and materials producers continue to search for ways to reduce greenhouse gas emissions. What impacts, however, can be made on reducing the environmental impacts of concrete structures through innovations in the structural design process? This presentation explores areas of the ACI 318 Building Code Requirements for Structural Concrete that could be examined for opportunities to reduce greenhouse gas emissions directly or indirectly.