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For the Milestone Year

By T. Fukase

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Special Issue: Advancements in Classical and Contemporary Neutralization/Carbonation Research

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1. Overview/Review

   1.1 New Perspectives on Neutralization/Carbonation in the Building Field

   By T. Noguchi

   1.2 Transition of the Role of Carbonation Depth in the Durability Verification for Reinforced Concrete

   By T. Kishi, Y. Yokoyama and T. Kamada

   1.3 Mechanisms of Carbonation of Concrete

   By I. Maruyama, R. Kurihara and N. Saeki

   1.4 Neutralization/Carbonation Environmental Considerations

   By D. Atarashi

2. Mechanism

   2.1 CO2 Absorption and Products of Cements by Accelerated Carbonation

   By M. Umetsu, D. Kurokawa, T. Mori and E. Sakai

   2.2 Prospects for Proposing a New Carbonation Process from the Viewpoint of Carbonation of C-S-H

   By T. Saito

   2.3 Effect of Humidity and Moisture Condition on Concrete Carbonation

   By Y. Suda

   2.4 Carbonation for Ground Granulated Blast Furnace Slag Cement Concrete-Comparing Accelerated Condition and Real Condition-

   By T. Iyoda

   2.5 Studies on Carbonation Speed and Pore Structure of Concrete Cured by High Carbon-Dioxide and High Temperature Atmosphere

   By T. Torichigai, K. Watanabe, K. Seki and K. Yokozeki

3. Measurement Method

   3.1 Comparison of Carbonation Progress under Accelerated Condition and Some Exposure Sites

   By H. Sakuraba and H. Koga

   3.2 Use of Phenolphthalein Solutions in Fire Damage Investigation of Concrete Structures

   By T. Kinose, N. Yoshida and D. Atarashi

   3.3 Study on Carbonation Suppression Effect of Exterior Finishing Materials

   By K. Etchuya

   3.4 Investigation on Methods for Quantifying CO2 Contained in Concrete Materials

   By T. Nagase, H. Takahashi, K. Haga and I. Maruyama

   3.5 Evaluation Example of CO2 Fixation Amount in Carbonation-Cured Concrete

   By T. Mori, R. Yasuda and T. Higuchi

4. Regulations/Guidelines

   4.1 Regulations on Carbonation of Concrete in the Building Standards Law and Housing Quality Assurance Act

   By T. Kage

   4.2 Handling of Carbonation and Its Background in Standard Specifications for Concrete Structures

   By H. Ueda

   4.3 Revision of Guidelines for Evaluation of Carbonation Considering Water Action-Along with Publication of “Practical Guideline for Investigation, Repair and Strengthening of Cracked Concrete Structures 2022”-

   By S. Miyazato, T. Kondo, K. Imamoto and T. Kamada

5. Assessment in Existing Structures

   5.1 Dealing with Carbonation for Existing Buildings Surveys

   By H. Hamasaki

   5.2 Study on Reuse of Partially Carbonated Existing Underground Structure in the Gotanda Project

   By N. Miyoshi, M. Sakai, H. Kishi and T. Kido

   5.3 Promoting CO2 Fixation in Existing Concrete Structure Using Amine

   By R. Saito, Y. Elakneswaran, M. Tsujino and R. Kitagaki

6. Environmentally Consideration

   6.1 Evaluation of CO2 Fixation Amount in CCU Material with CO2 Fixed in Recycled Aggregate

   By M. Kojima, Y. Ikeo, Y. Nishioka and S. Kawajiri

   6.2 Experimental Study of CO2 Fixation Technology during Concrete Production

   By J. Matsumoto, O. Hashimoto, J. Sakamoto and T. Maruya

   6.3 Application to Mixing Water of Calcium Hydroxide Solution Injected by Carbon Dioxide

   By M. Shinsugi, K. Sakurai, Y. Ishizeki and K. Kawai