OH DAYOUNG
| Faculty of Engineering Division of Architecture Research Group of Structural Engineering and Materials | Assistant Professor |
Last Updated :2025/01/11
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Papers
- 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 - The initial carbonation behavior of synthetic C-S-H by relative humidity
Tianlong Zheng, Junshan Zhang, Dayoung Oh, Ryoma Kitagaki
Springer Proceedings (International Conference on Concrete Sustainability 2024), Sep. 2024 - The effect of wet-dry cycles on carbonation compared to the constant relative humidity conditions
Zhiwei Zhao, Dayoung Oh, Ryoma Kitagaki, Takayoshi Masuo
Springer Proceedings (International Conference on Concrete Sustainability 2024), Sep. 2024 - 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, 呉多英, 潘談, 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 CO
2 absorption evaluating device for building materials
Dayoung Oh, Ryoma Kitagaki, Takayoshi Masuo, Yasuhiro Kuroda
Energy Reports, 11, 4008, 4014, Jun. 2024
Scientific journal, Quantitative analysis, such as thermogravimetric analysis (TGA), is often used to evaluate the CO2 absorption of building materials. However, as interest in CO2 absorption of building materials increases, a more universal and practical evaluation method has been required. This paper explains the mechanism of the “simple and visible” CO2 absorption evaluation device produced by the authors as a prototype and reports the CO2 absorption evaluation method and results. Experiments using the device showed that the higher the water-to-cement ratio and the larger the specific surface area of the hardened cement paste, the higher the CO2 absorption rate. Compared to the TGA results, a slight error occurred, which appeared to be due to an increase in vapor pressure due to H2O generated through the carbonation reaction. The device is useful when it is difficult to use expensive equipment because quantitative evaluation is possible if basic physical information is known in advance. - 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, In this study, a formula for estimating the solidification tensile strength caused by interparticle force with arbitrary particle size distributions was proposed based on Rumpf's formula, originally designed for predicting the tensile strength of solidifications comprised of particles with identical diameters. To estimate the capillary force between unequal-sized spherical particles, the approximate solution of Lian et al. was used. The proposed tensile strength equation changes depending on interparticle force, particle size distribution, the packing fraction and average coordination number. Using the proposed formula, the tensile strength according to the difference in particle size distribution was calculated under certain environmental conditions. The results showed that even if the median value of particle size was the same, the tensile strength varied because the packing fraction and surface area of particles per unit volume varied depending on the particle size distribution. - 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, The rapid industrial development and global population growth of the past century have resulted in an exponential increase of resource consumption and thus caused elevated CO2 emissions that, in turn, are held responsible for global warming and associated environmental problems that require urgent solutions. Specifically, increase of cement production causes CO2 pollution and generates a significant amount of concrete waste. Waste concrete, the major component of construction waste, can be efficiently recycled and is mainly used as a roadbed or backfill material. However, as no further resource recycling is expected for waste concrete, more efficient and productive recycling systems are sought after. Herein, waste concrete powder is used to produce added-value inorganic building materials, namely recycled cement and solidification. The characteristics of recycled cement (manufactured through calcination) are evaluated in terms of free lime content, mineral composition, density, color, flow test and strength, and the performance of recycled cement is found to be identical to that of ordinary Portland cement. X-ray diffraction and compressive strength analyses of the solidification manufactured through hydrothermal synthesis show that blocks of the desired strengths can be produced by adjusting the degree of consolidation and curing conditions. Based on these results, this study proposes a concrete waste recycling system to reduce the amount of construction waste and prevent resource depletion. - 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, Various empirical equations have previously been suggested for estimating the modulus of elasticity of concrete from its compressive strength. In addition, a considerable number of practical and universal equations have been proposed for predicting the modulus of elasticity when the product includes coarse aggregates and various types of mineral additions. However, such equations are not applicable to the whole data for recycled aggregate concrete because its mechanical properties depend greatly on both the type of aggregates recycled and the ratio of the mix proportions within such concrete. In this study, more than 1300 experimental data obtained from studies performed between 1980 and 2012 in Japan and Korea were used to statistically analyse the relationship between compressive strength and modulus of elasticity. The compressive strength of recycled aggregate concrete was found to range between 18 and 65 MPa, and therefore a prediction equation is proposed for recycled aggregate concrete that considers the ratio and types of recycled coarse aggregates used. - CO
2 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
CO2 emitted from calcination processes in kilns comprises 60% of all emissions from cement production. The chemical components of building materials, demolished inorganic building materials (DIBMs), and waste concrete powder (WCP) are similar to those of cement minerals. Therefore, if DIBMs are used as a cement substitute material along with limestone, the quantity of disposed waste and the use of limestone will likely be reduced, as will CO 2 emissions during cement production. This study proposes a recycling method for recycled cement, using DIBMs and WCP as cement substitute materials, and the properties of trial recycled cement were evaluated. The mortar specimen using recycled cement showed a high compressive strength, as did the ordinary Portland cement mortar. According to the proposed composition, the producible recycled cement was derived from 0.5% to 9.1% of annual cement production (about 57.6 million tons) in Japan. Additionally, the CO2 reduction by usage of recycled cement ranged from 0.06 million tons to 0.72 million tons from the total annual CO2 emissions from cement production (about 29.4 million tons), using natural resources in Japan. © 2014 Elsevier Ltd. - 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
Other Activities and Achievements
Lectures, oral presentations, etc.
- 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, 呉多英, 潘談, 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
Research Themes
- 乾湿繰り返し環境下におけるC-S-HのCO2促進固定手法の提案
科学研究費助成事業
01 Apr. 2024 - 31 Mar. 2027
呉 多英
日本学術振興会, 若手研究, 北海道大学, 24K17386 - 乾湿繰り返し条件における合成C-S-Hの炭酸化挙動の評価に関する研究
科学研究費助成事業
31 Aug. 2023 - 31 Mar. 2025
呉 多英
日本学術振興会, 研究活動スタート支援, 北海道大学, 23K19155
Educational Organization
- Bachelor's degree program, School of Engineering
- Master's degree program, Graduate School of Engineering
- Doctoral (PhD) degree program, Graduate School of Engineering
