2021/11/16 更新

写真a

アイリ アブドゥシャラーム
AILI Abudushalamu
AILI Abudushalamu
所属
大学院環境学研究科 都市環境学専攻 建築構造システム 特任講師
職名
特任講師

学位 3

  1. 工学博士 ( 2017年10月 ) 

  2. 工学修士 ( 2012年6月   国立土木学校(仏) ) 

  3. 工学学士 ( 2009年7月   清華大学(中国) ) 

研究キーワード 5

  1. 材料分析

  2. セメント化学

  3. poromechanics

  4. multi-physical couplings

  5. multi-scale modeling

経歴 3

  1. 名古屋大学   丸山研究室   特任助教

    2019年11月 - 2021年3月

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    国名:日本国

  2. 名古屋大学   丸山研究室   研究員

    2018年4月 - 2019年10月

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    国名:日本国

  3. 国立土木学校(仏)   研究員

    2017年11月 - 2018年6月

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    国名:フランス共和国

 

論文 7

  1. Time-dependent water vapor desorption isotherm model of hardened cement paste

    Rymes Jiri, Maruyama Ippei, Aili Abudushalamu

    CEMENT AND CONCRETE RESEARCH   150 巻   2021年12月

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    記述言語:日本語   出版者・発行元:Cement and Concrete Research  

    This study aims to enhance moisture transport modeling by elucidating the so-called anomalous water diffusion in cementitious materials. Water desorption isotherms are measured from samples at various drying stages using techniques with different durations to quantify the impact of the drying duration on the water sorption ability. A single water sorption isotherm does not solely give a relationship between the water content and relative humidity but also represents the state of microstructure. The continuous evolution of a desorption isotherm due to drying-induced microstructural rearrangement is demonstrated. For numerical modeling, the microstructural alteration can be explicitly considered through a dynamic desorption isotherm model, which governs the local thermodynamic equilibrium at the capillary meniscus. This approach is implemented into a multiphase transport code, whose ability to predict drying is validated using literature data. Finally, the effect of prolonged drying on the colloidal nature of the calcium-silicate-hydrate gel is discussed.

    DOI: 10.1016/j.cemconres.2021.106612

    Web of Science

    Scopus

  2. The Relative Humidity Range for the Development of Irreversible Shrinkage in Hardened Cement Paste

    Maruyama Ippei, Kishi Naoya, Aili Abudushalamu

    JOURNAL OF ADVANCED CONCRETE TECHNOLOGY   19 巻 ( 6 ) 頁: 585 - 592   2021年6月

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    記述言語:日本語   出版者・発行元:Journal of Advanced Concrete Technology  

    For better understanding of irreversible shrinkage, nine hardened cement paste (hcp) samples with three different cement types and three different water to cement ratio were prepared. Four different relative humidity conditioning histories containing the first desorption, re-humidification and the second desorption are investigated for all the specimens to obtain the length change and water sorption isotherms. The irreversible shrinkage strain was developed when the specimen was dried up to less than 80% relative humidity (RH), while other previous experiments in literatures showed that the shrinkage strain between 40% RH and 11% RH is reversible. It is concluded that the irreversible shrinkage strain is developed between 80% RH and 40% RH, which is also supported by the change in water vapor BET surface area of hardened cement paste after long-term drying.

    DOI: 10.3151/jact.19.585

    Web of Science

    Scopus

  3. Long-term use of modern Portland cement concrete: The impact of Al-tobermorite formation

    Maruyama Ippei, Rymes Jiri, Aili Abudushalamu, Sawada Shohei, Kontani Osamu, Ueda Shinya, Shimamoto Ryu

    MATERIALS & DESIGN   198 巻   2021年1月

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    記述言語:日本語   出版者・発行元:Materials and Design  

    The distribution of compressive strength in thick concrete members exposed to various environments in a nuclear power plant undergoing decommissioning is investigated. X-ray diffraction data, scanning electron microscopy analysis, and chemical analysis data reveal that rock-forming minerals in the aggregate had reacted and portlandite had been consumed to form calcium alumino silicate hydrates (C-A-S-H) when evaporable water content was sufficient. In addition, the study confirms Al-tobermorite formation in modern concrete after 16.5 years of elevated temperature conditions ranging from 40 to 55 °C. It is concluded that an appropriate aggregate and binder combination for the concrete enhances the compressive strength of thick concrete members thanks to the reaction of rock-forming minerals with portlandite, and also strengthens the chemical stability through the formation of Al-tobermorite under elevated temperature conditions and sufficient evaporable water content.

    DOI: 10.1016/j.matdes.2020.109297

    Web of Science

    Scopus

  4. Review of Several Experimental Methods for Characterization of Micro- and Nano-Scale Pores in Cement-Based Material

    Aili Abudushalamu, Maruyama Ippei

    INTERNATIONAL JOURNAL OF CONCRETE STRUCTURES AND MATERIALS   14 巻 ( 1 )   2020年11月

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    記述言語:日本語   出版者・発行元:International Journal of Concrete Structures and Materials  

    Mechanical properties and durability of cement-based materials are largely affected by pore structures. This paper provides an overview of several experimental techniques to characterize pore size distribution and specific surface area, with focus on pores in calcium silicate hydrates. The reviewed experimental techniques are nitrogen and water vapor sorption isotherm, proton nuclear magnetic resonance (1H-NMR) and small-angle scattering (SAS). Different pretreatment methods are compared for sorption measurements. Pore size distribution and specific surface area are analyzed using data from different methods to understand difference and consistency of these methods. It is found that pore size distribution calculated from sorption isotherm is very sensitive to adsorption model. Though specific surface areas from different techniques are quite different from each other, they are all able to detect the microstructural alteration due to long-term drying.

    DOI: 10.1186/s40069-020-00431-y

    Web of Science

    Scopus

  5. Modeling Long-term Delayed Strains of Prestressed Concrete with Real Temperature and Relative Humidity History

    Aili Abudushalamu, Torrenti Jean-Michel

    JOURNAL OF ADVANCED CONCRETE TECHNOLOGY   18 巻 ( 7 ) 頁: 396-408   2020年7月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.3151/jact.18.396

    Web of Science

  6. Creep behavior of C-S-H under different drying relative humidities: Interpretation of microindentation tests and sorption measurements by multi-scale analysis

    Suwanmaneechot Piyapong, Aili Abudushalamu, Maruyama Ippei

    CEMENT AND CONCRETE RESEARCH   132 巻   2020年6月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1016/j.cemconres.2020.106036

    Web of Science

    Scopus

  7. Prediction of the delayed deformations of a nuclear power plant using MC2010 and new EC2 relations for concrete creep and shrinkage

    Torrenti J.M., Aili A.

    Proceedings of the fib Symposium 2020: Concrete Structures for Resilient Society     頁: 773 - 780   2020年

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    記述言語:日本語   出版者・発行元:Proceedings of the fib Symposium 2020: Concrete Structures for Resilient Society  

    The prediction of the delayed deformations of prestressed concrete structures like nuclear power plants (NPPs) is important in order to assess and/or extend the service life of such structures. It is also a safety concern because, in these structures, the prestressing is there to avoid tensile stresses and cracking in case of a severe accident (where an internal pressure is generated). In this paper, the relations proposed in MC2010 and in the future Eurocode 2 for the delayed strains (creep and shrinkage of concrete and relaxation of steel) are used to predict the behaviour of a NPP built 25 years ago. As proposed in the future Eurocode 2, the parameters of the relations giving the evolution of shrinkage and creep are fitted to measurements made on laboratory samples when the NPP was built. The influence of the temperature and of the relative humidity inside the containment are also taken into account. Finally, using the superposition principle in a biaxial context, the predicted delayed strains are compared with the measurements.

    Scopus

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