Effect of Wet−dry Cycles and Water-to-cement Ratios on Cement Paste Carbonation
Zhiwei Zhao, Dayoung Oh, Ryoma Kitagaki, Tianlong Zheng, Ippei Maruyama
Journal of Advanced Concrete Technology, 23, 4, 205, 222, Japan Concrete Institute, 22 Apr. 2025
Scientific journal

Analysis of Mechanical Performance of Soil Solidification and Examination of Compatibility as Semi-Permanent House Material for Forcibly Displaced People
Dayoung Oh, Takafumi Noguchi, Ryoma Kitagaki
Powders, 4, 2, 10, 10, MDPI AG, 31 Mar. 2025
Scientific journal, This study aims to investigate the suitability of earthen housing for refugees and establish a more efficient system for selecting and adjusting materials by quantitatively analyzing the influence of various factors affecting the mechanical performance of earthen housing. This paper examined the impact of dry unit weight, particle size distribution of soil solidification, clay minerals, and pH on the mechanical performance of soil solidification through compressive strength testing. Additionally, the tensile strength resulting from capillary forces between particles was estimated using a prediction equation, and the effects of capillary forces and cohesive forces due to clay minerals were quantitatively assessed by comparing them with the results of the compressive strength experiments. In an alkaline environment, conflicting results were obtained regarding the effect of the dispersion of particles on compressive strength, depending on the presence or absence of clay minerals in the soil. Based on these results, the implementation of earthen houses constructed in the target refugee camp was evaluated, and strategies for building houses more efficiently under given conditions were discussed.

ITZ properties of LWA surroundings in high strength mortar according to LWA/sand with relative humidity
Sujeong Pyeon, Gyuyong Kim, Byungcheol Choi, Dayoung Oh, Yubin Leem, Ryoma Kitagaki, Jeongsoo Nam
Construction and Building Materials, Nov. 2024
Scientific journal

Natural carbonation boost for hardened cement fines by dripping technique
Dayoung Oh, Ryoma Kitagaki, Takayoshi Masuo, Zhijiang Li, Ryo Kurihara, Takafumi Noguchi, Ippei Maruyama
Cement and Concrete Composites, 105731, 105731, Elsevier BV, Aug. 2024
Scientific journal

水酸化カルシウム懸濁溶液を用いた炭酸化反応を促進するアミンのスクリーニング法の構築　　　　　　　　　　　　　　　
北垣亮馬, 潘談, 呉多英, 齊藤亮介
日本コンクリート工学会年次論文集, 46, 1489, 1494, Jun. 2024

The study on the carbonation promotion process of hardened cement paste in the dripping method　　　　　　　　　　　　　　　
Yamin Jin, Dayoung Oh, Ryoma Kitagaki
Proceedings of the Japan Concrete Institute, 46, 649, 654, Jun. 2024

Imaging methodology for density distribution and carbonation depth of concrete specimens using hyperspectral analysis　　　　　　　　　　　　　　　
Yuzhe Wang, Ryoma Kitagaki, Dayoung Oh
Proceedings of the Japan Concrete Institute, 46, 1783, 1788, Jun. 2024

Development of CO2 absorption evaluating device for building materials
Dayoung Oh, Ryoma Kitagaki, Takayoshi Masuo, Yasuhiro Kuroda
Energy Reports, 11, 4008, 4014, Jun. 2024
Scientific journal

Proposal of a formula for estimating the tensile strength of solidification with arbitrary particle size distribution
Dayoung Oh, Takafumi Noguchi, Yutaka Aikawa, Ryoma Kitagaki
Powder Technology, 436, 01 Mar. 2024
Scientific journal

The Initial Carbonation Behavior of Synthetic C-S-H by Relative Humidity
Tianlong Zheng, Junshan Zhang, Dayoung Oh, Ryoma Kitagaki
Lecture Notes in Civil Engineering, 574, 359, 365, 2024
International conference proceedings

The Effect of Wet-Dry Cycles on Carbonation Compared to the Constant Relative Humidity Conditions
Z. Zhao, D. Oh, R. Kitagaki, T. Masuo
Lecture Notes in Civil Engineering, 574, 352, 358, 2024
International conference proceedings

Evaluation of Carbonation Degree of Hardened Cement Paste with Different Water-Cement Ratio in Wet-Dry Cycle
Zhiwei Zhao, Dayoung Oh, Yuzhe Wang, Ryoma Kitagaki, Takayoshi Masuo
16th International Conference on Durability of Building Materials and Components, CIMNE, Oct. 2023
International conference proceedings

Evaluate the ability to determine the carbonation depth of concrete by hyperspectral imaging
Yuzhe Wang, Dayoung Oh, Ryoma Kitagaki
16th International Conference on Durability of Building Materials and Components, CIMNE, Oct. 2023
International conference proceedings

ハイブリッド補修材で補修されたセメントペーストの炭酸化過程における長さ・質量変化率の湿度・CO2濃度依存性　　　　　　　　　　　　　　　
辻本亜美, 北垣亮馬, 呉多英
日本コンクリート工学会年次論文集, 45, 1, 1516, 1521, 2023

Development of Consolidation Plate with Red Clay for Wooden Structure Joint and Performance Evaluation under Different Curing Methods　　　　　　　　　　　　　　　
Dayoung Oh, Eunmi SHIN, Hyeonggil Choi, Juna LEE
Journal of the Korean Society for Advanced Composite Structures, 12, 2, 12, 20, Apr. 2021

Proposal of demolished concrete recycling system based on performance evaluation of inorganic building materials manufactured from waste concrete powder
Dayoung Oh, Takafumi Noguchi, Ryoma Kitagaki, Hyeonggil Choi
Renewable and Sustainable Energy Reviews, 135, Jan. 2021
Scientific journal

Modulus of elasticity of recycled aggregate concrete
Won Jun Park, Takafumi Noguchi, Sang Heon Shin, Da Young Oh
Magazine of Concrete Research, 67, 11, 585, 591, 01 Jun. 2015
Scientific journal

CO2 emission reduction by reuse of building material waste in the Japanese cement industry
Da Young Oh, Takafumi Noguchi, Ryoma Kitagaki, Won Jun Park
Renewable and Sustainable Energy Reviews, 38, 796, 810, Oct. 2014

東日本大震災における津波による住宅の塩害被害に関する調査　　　　　　　　　　　　　　　
福山 智子, 呉 多英, 西脇 智哉, 野口 貴文
コンクリート工学年次論文集, 34, 1, 838, 843, Jun. 2012

難民の住環境および難民住宅に適用可能な建築材料の検討
呉 多英, 野口 貴文, 日本建築学会関東支部研究報告集, 90, 435, 438, Mar. 2020
日本建築学会, Japanese

CARBONATION DEGREE OF C-S-H IN WET-DRY CYCLE　　　　　　　　　　　　　　　
Oh, D., Zhang, J., Zheng, T., Kitagaki, R.
International Conference on Research and Application of Carbonation Technology for Wastes and Concrete 2024, Dec. 2024

The initial carbonation behavior of synthetic C-S-H by relative humidity　　　　　　　　　　　　　　　
T. Zheng, J. Zhang, D. Oh, R. Kitagaki
International Conference on Concrete Sustainability (ICCS 2024), Sep. 2024

The effect of wet-dry cycles on carbonation compared to the constant relative humidity conditions　　　　　　　　　　　　　　　
Z. Zhao, D. Oh, R. Kitagaki, T. Masuo
International Conference on Concrete Sustainability (ICCS 2024), Sep. 2024

Comparing the degree of carbonation of hardened cement paste by wet-dry cycle carbonation methods　　　　　　　　　　　　　　　
D. Oh, Z. Zhao, Z. Li, Y. Jin, R. Kitagaki
RILEM Week 2024, Aug. 2024

コンクリート試料の密度分布と炭酸化深度を分析す るためのハイパースペクトルデータのイメージング　　　　　　　　　　　　　　　
王宇哲, 北垣亮馬, 呉多英
コンクリート工学年次大会2024年, Jun. 2024

THE STUDY ON THE CARBONATION PROMOTION PROCESS OF HARDENED CEMENT PASTE IN THE DRIPPING METHOD　　　　　　　　　　　　　　　
金亜銘, 呉多英, 北垣亮馬
コンクリート工学年次大会2024年, Jun. 2024

水酸化カルシウム懸濁溶液を用いた炭酸化反応を促 進するアミンのスクリーニング法の構築　　　　　　　　　　　　　　　
北垣亮馬, 潘談, 呉多英, 齊藤亮介
コンクリート工学年次大会2024年, Jun. 2024

C/S 比および湿度による合成C-S-H の炭酸化挙動に 関する基礎的な研究　　　　　　　　　　　　　　　
呉多英, 鄭添龍, 張峻山, 北垣亮馬
セメント技術大会2024年, May 2024

Evaluation of Carbonation Degree of Hardened Cement Paste with Different Water-Cement Ratio in Wet-Dry Cycle　　　　　　　　　　　　　　　
Zhiwei ZHAO, Dayoung OH, Yuzhe WANG, Ryoma KITAGAKI, Takayoshi MASUO
XVI International Conference on Durability of Building Materials and Components (DBMC 2023)
10 Oct. 2023 - 13 Oct. 2023

Evaluate the ability to determine the carbonation depth of concrete by hyperspectral imaging　　　　　　　　　　　　　　　
Yuzhe Wang, Dayoung Oh, Ryoma Kitagaki
XVI International Conference on Durability of Building Materials and Components (DBMC 2023)
10 Oct. 2023 - 13 Oct. 2023

Mechanical properties of Hardened Cement Paste Containing Amines　　　　　　　　　　　　　　　
X. Zhuo, T. Pan, D. Oh, R. Kitagaki, Y. Elakneswaran, H. Senboku, R.Saito, K.Yano, Y. Yoda, M. Tsujino, A. Nishida
The 16th International Congress on the Chemistry of Cement 2023 (ICCC2023), 22 Sep. 2023
18 Sep. 2023 - 22 Sep. 2023

Promoting Carbonization of Hardened Cement Paste by Wet-Dry Cycle　　　　　　　　　　　　　　　
Dayoung OH, Zhiwei Zhao, Yuzhe Wang, Ryoma Kitagaki, Takayoshi Masuo, Takafumi Noguchi
The 16th International Congress on the Chemistry of Cement 2023 (ICCC2023), 22 Sep. 2023
18 Sep. 2023 - 22 Sep. 2023

モルタルの凍結融解抵抗性における化学混和剤の気泡による効果の再検証　　　　　　　　　　　　　　　
齊藤 陸斗, 北垣 亮馬, 呉 多英
日本建築学会大会学術講演梗概集2023年
12 Sep. 2023 - 15 Sep. 2023

ナノインデンテーション法を用いた弾性率測定に基づく養生日数と骨材の違いが遷移帯形成に及ぼす影響評価　　　　　　　　　　　　　　　
甲斐和樹, 北垣亮馬, Dayoung Oh, 依田侑也
日本建築学会大会学術講演梗概集2023年
12 Sep. 2023 - 15 Sep. 2023

発砲ポリウレタン断熱材のセル界面部における結合分解制御メカニズムの導入による資源循環技術　　　　　　　　　　　　　　　
池田智裕, 北垣亮馬, 任裕彬, 呉多英
日本建築学会大会学術講演梗概集2023年
12 Sep. 2023 - 15 Sep. 2023

促進紫外線暴露したポリウレタン塗膜の劣化による寸法変化メカニズムに関する基礎的研究　　　　　　　　　　　　　　　
鍋山哲史, 小師柚子, 北垣亮馬, 呉多英
日本建築学会大会学術講演梗概集2023年
12 Sep. 2023 - 15 Sep. 2023

画像相関法を用いたポリウレタン塗膜の寸法変化に関する研究　　　　　　　　　　　　　　　
小師柚子, 鍋山哲史, 北垣亮馬, 呉多英
日本建築学会大会学術講演梗概集2023年
12 Sep. 2023 - 15 Sep. 2023

pyGCMSを用いたセメント硬化体―高分子劣化メカニズムの解明手法の構築に関する研究　　　　　　　　　　　　　　　
北居航, 北垣亮馬, 呉多英, 小島静
日本建築学会大会学術講演梗概集2023年
12 Sep. 2023 - 15 Sep. 2023

相対湿度変化による合成C-S-Hの初期炭酸化挙動に関する研究　　　　　　　　　　　　　　　
呉多英, 鄭添龍, 尹戈喬, 李治江, 北垣亮馬
日本建築学会大会学術講演梗概集2023年
12 Sep. 2023 - 15 Sep. 2023

FUNDAMENTAL STUDY ON CARBONATION BOOSTING METHOD OF HARDENED CEMENT PASTE　　　　　　　　　　　　　　　
Dayoung OH, Ryoma KITAGAKI, Yuzhe WANG, Ryo KURIHARA, Ippei MARUYAMA, Takayoshi MASUO
RILEM Week 2023, 08 Sep. 2023
04 Sep. 2023 - 08 Sep. 2023

ハイブリッド補修材で補修されたセメントペーストの炭酸化過程における長さ・質量変化率の湿度・CO2濃度依存性　　　　　　　　　　　　　　　
辻本 亜美, 北垣 亮馬, 呉 多英
コンクリート工学年次大会2023年
05 Jul. 2023 - 07 Jul. 2023

Development of simple evaluation device for CO₂ uptake rate for various building materials　　　　　　　　　　　　　　　
北垣亮馬, OH Dayoung, 増尾孝義, 黒田泰弘
日本建築仕上学会大会学術講演会研究発表論文集, 2023
2023 - 2023

モルタルの凍結融解抵抗性における化学混和剤の気泡による効果の再検証　　　　　　　　　　　　　　　
松島克矢, 齊藤陸斗, 呉多英, 北垣亮馬
セメント技術大会講演要旨(CD-ROM), 2023
2023 - 2023

Water-resistance and compressive strength of earth with eggshell and sodium hydroxide　　　　　　　　　　　　　　　
OH Dayoung, 野口貴文
日本建築学会大会学術講演梗概集・建築デザイン発表梗概集(CD-ROM), 2021
2021 - 2021

8067 避難民の状況に基づいた避難民住宅の提案および要求条件の分析
呉 多英, 野口 貴文
建築社会システム, Sep. 2020, 日本建築学会, Japanese
Sep. 2020 - Sep. 2020

難民の住環境および難民住宅に適用可能な建築材料の検討
呉 多英, 野口 貴文
日本建築学会関東支部研究報告集, Mar. 2020, 日本建築学会, Japanese
Mar. 2020 - Mar. 2020

1697 Characterization of cement produced from inorganic construction waste
OH Dayoung, NOGUCHI Takafumi, KITAGAKI Ryoma
Summaries of technical papers of annual meeting, 30 Aug. 2013, Architectural Institute of Japan, Japanese
30 Aug. 2013 - 30 Aug. 2013

1541 Synthesis of Multi-Agent System Based on the Evolutionary Method And Its Applications to the Field of Concrete Industry
Oh Dayoung, Yamagishi Hideki, Kitagaki Ryoma, Noguchi Takafumi
Summaries of technical papers of annual meeting, 12 Sep. 2012, Architectural Institute of Japan, Japanese
12 Sep. 2012 - 12 Sep. 2012

1116 Relationship between Compressive Strength and Various Mechanical Properties of Recycled Aggregate Concrete : Part 2. Relationship with Tensile strength and Flexural strength
OH Dayoung, PARK Wonjun, SHIN Sangheon, NOGUCHI Takafumi
Summaries of technical papers of Annual Meeting Architectural Institute of Japan. A-1, Materials and construction, 20 Jul. 2011, Architectural Institute of Japan, Japanese
20 Jul. 2011 - 20 Jul. 2011

1117 Relationship between Compressive Strength and Various Mechanical Properties of Recycled Aggregate Concrete : Part 3. Relationship with Modulus of Elasticity
PARK Wonjun, OH Dayoung, SHIN Sangheon, NOGUCHI Takafumi
Summaries of technical papers of Annual Meeting Architectural Institute of Japan. A-1, Materials and construction, 20 Jul. 2011, Architectural Institute of Japan, Japanese
20 Jul. 2011 - 20 Jul. 2011

1115 Relationship between Compressive Strength and Various Mechanical Properties of Recycled Aggregate Concrete : Part 1. Relationship with Water-cement ratio and Density
SHIN Sangheon, PARK Wonjun, OH Dayoung, NOGUCHI Takafumi
Summaries of technical papers of Annual Meeting Architectural Institute of Japan. A-1, Materials and construction, 20 Jul. 2011, Architectural Institute of Japan, Japanese
20 Jul. 2011 - 20 Jul. 2011

再生骨材コンクリートにおける圧縮強度とヤング係数との関係　　　　　　　　　　　　　　　
朴元俊, 呉多英, 申尚憲, 野口貴文
セメント技術大会講演要旨(CD-ROM), 2011
2011 - 2011